Saturday, 5 September 2026
Saturday, 5 September 2026
- In brief
- 1In China a rocket company cannot sell shares until it has put something in orbit. Six new Chinese rockets have flown this year.
- 2A Chinese rocket stage broke apart in orbit
- 3NASA looks at buying rockets in blocks
- 4India's high-orbit imaging satellite is away
- 5A budget request would cut NASA science by nearly half
- 6New Horizons may stop sending solar-wind data
- 7BepiColombo lets go after eight years
- 8Europe's Spectrum rocket gets a second try
- 9Blue Origin starts a hangar while its rocket is grounded
- 10Europe's space agency signals it will lean on a satellite merger
- 11NASA is teaching astronauts to steer by the stars
- 12Swift's third telescope is still dark
- 13A student balloon flies for the twentieth year
- 14A quiet supersonic jet passes 25 test flights
- 15A founder of China's rocket programme died at 93
- 16ESA publishes the book it gave its ministers
- TruthThe truth, across the day
5 Sept · Space · In brief
Space · Saturday, 5 September 2026
Space, in brief
16 stories · 15 sources
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What is moving · 1 of 3
Money waiting to be raised
Four Chinese space firms announced fresh rounds in recent months, and investment arms of state-owned banks anchored two of them
What is moving · 2 of 3
Losses at the companies
LandSpace lost $253m in 2025 on $7.7m of sales
What is moving · 3 of 3
Checking from outside China
The US Space Force had logged no upper stage and no payload from Pallas-1's flight as of late Thursday
16 stories
- 1In China a rocket company cannot sell shares until it has put something in orbit. Six new Chinese rockets have flown this year.
- 2A Chinese rocket stage broke apart in orbit
- 3NASA looks at buying rockets in blocks
- 4India's high-orbit imaging satellite is away
- 5A budget request would cut NASA science by nearly half
In China a rocket company cannot sell shares until it has put something in orbit. Six new Chinese rockets have flown this year.
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A rocket company in China cannot sell shares on the Shanghai Stock Exchange until it has put a payload into orbit on a medium-to-large rocket with a reusable first stage.
The exchange took its listing application the day after its rocket reached orbit
Who is involved
The Shanghai Stock Exchange
one of mainland China's two main stock markets; last December it ruled that a rocket firm must have put a payload in orbit on a medium-to-large reusable rocket before it can list
Who is involved
LandSpace
a Beijing rocket maker; last month it landed the first stage of its Zhuque-3 rocket, the third company anywhere to land an orbital booster on legs, and it is furthest along toward a listing
Why it matters
Watch whether the US Space Force logs Pallas-1's upper stage, or Galactic Energy publishes the orbit it reached, because either would settle whether the flight that counts toward a listing went as described.
What's really going on
China's stock exchange has made a rocket launch part of a share sale: a company cannot list on the STAR Market until it has put a payload in orbit on a medium-to-large reusable rocket.
What's really going on
Galactic Energy says its Pallas-1 did exactly that on 31 August, and as of late Thursday the US Space Force had still not logged the rocket's upper stage or any payload from that flight.
Who gains
LandSpace
Landing a Zhuque-3 first stage last month is not only an engineering result now; under the December rule it is also the qualification the exchange asks for, and LandSpace is furthest along in the queue.
Who gains
CAS Space
Its listing application was accepted the day after Kinetica-2 reached orbit in March, turning one flight into a place in the queue for about $607m.
Who pays
Space Pioneer
Its Tianlong-3 failed on its first flight in April, and under the same rule that promotes its rivals it is stuck in listing preparation.
Who pays
Chinese share buyers
LandSpace wants about $1.1bn against $7.7m of sales and a $253m loss in 2025, and does not expect a profit before 2029.
Nobody knows yet
Whether Galactic Energy's Pallas-1 reached the orbit it was aiming for.
The company says it did. Chinese state media reported a success. The US Space Force had added neither the upper stage nor any payload to its catalogue as of late Thursday, and Galactic Energy has not published the height or tilt of the orbit.
Nobody knows yet
What Pallas-1 was carrying.
No payload has been named by the company or catalogued by anyone else.
The short version
That's the story in short.
The whole story has 12 more parts.
or swipe up for the next storyor scroll on for the next story ↓
The whole story, in 12 parts ↓
Part 1 of 12 · Who else is involved
CAS Space
a company spun out of the Chinese Academy of Sciences, China's main state research body; its listing application was accepted a day after its rocket reached orbit
Part 1 of 12 · Who else is involved
Galactic Energy
a Beijing rocket maker; it flew Pallas-1 for the first time on 31 August and began listing preparation in October 2025
Part 2 of 12
The exchange issued that rule last December.
Part 2 of 12
It sits inside a pathway China built so companies that are not yet making a profit can still list.
Part 3 of 12
The wider reform came in June 2025, when Chinese regulators widened the STAR Market's listing standards for loss-making technology firms, commercial space among them.
Part 3 of 12
Instead of a revenue or profit floor they ask for state authorisation, a large market and staged results.
Part 4 of 12
The STAR Market is China's stock market for domestic technology companies, set up as an answer to Nasdaq in the United States.
Part 5 of 12
So a launch now does two jobs at once.
Part 5 of 12
CAS Space, a company spun out of the Chinese Academy of Sciences, reached orbit with its Kinetica-2 rocket in March, and the exchange accepted its listing application the next day.
Part 6 of 12
Space Pioneer's Tianlong-3 rocket failed on its first flight in April.
Part 6 of 12
The company entered listing preparation in 2025 and is still sitting there.
Part 7 of 12
None of these firms makes money.
Part 7 of 12
LandSpace is asking share buyers for about $1.1bn against $7.7m of sales in 2025 and a loss of $253m, and does not expect a profit before 2029.
Part 8 of 12
CAS Space is seeking about $607m.
Part 8 of 12
It lost $105m on $34m of sales in 2024.
Part 9 of 12
Six new Chinese rockets have flown for the first time this year, and five of them have a first stage built to be recovered.
Part 9 of 12
The listing rule asks for exactly that kind of rocket.
Part 10 of 12
Galactic Energy flew its Pallas-1 rocket for the first time on 31 August from the Jiuquan launch centre in north-west China, and says it reached the orbit it was aiming for.
Part 10 of 12
Pallas-1 can lift about 7,000 kilograms to low orbit, a few hundred kilometres up.
Part 11 of 12
Galactic Energy began listing preparation in October 2025 and has not yet filed an application.
Part 11 of 12
It wants to try landing a first stage late this year.
Part 12 of 12
The US Space Force had not added Pallas-1's upper stage or any payload to its catalogue of objects in orbit as of late Thursday, which is unusual after a launch that worked.
Part 12 of 12
Jonathan McDowell, who keeps a widely followed record of spaceflight activity, wrote that he could not regard the launch as confirmed.
4 sources
In China a rocket company cannot sell shares until it has put something in orbit. Six new Chinese rockets have flown this year.
The full story
In China a rocket company cannot sell shares until it has put something in orbit. Six new Chinese rockets have flown this year.
A rocket company in China cannot sell shares on the Shanghai Stock Exchange until it has put a payload into orbit on a medium-to-large rocket with a reusable first stage.
The exchange issued that rule last December. It sits inside a pathway China built so companies that are not yet making a profit can still list.
The wider reform came in June 2025, when Chinese regulators widened the STAR Market's listing standards for loss-making technology firms, commercial space among them. Instead of a revenue or profit floor they ask for state authorisation, a large market and staged results.
The STAR Market is China's stock market for domestic technology companies, set up as an answer to Nasdaq in the United States.
So a launch now does two jobs at once. CAS Space, a company spun out of the Chinese Academy of Sciences, reached orbit with its Kinetica-2 rocket in March, and the exchange accepted its listing application the next day.
Space Pioneer's Tianlong-3 rocket failed on its first flight in April. The company entered listing preparation in 2025 and is still sitting there.
None of these firms makes money. LandSpace is asking share buyers for about $1.1bn against $7.7m of sales in 2025 and a loss of $253m, and does not expect a profit before 2029.
CAS Space is seeking about $607m. It lost $105m on $34m of sales in 2024.
Six new Chinese rockets have flown for the first time this year, and five of them have a first stage built to be recovered. The listing rule asks for exactly that kind of rocket.
Galactic Energy flew its Pallas-1 rocket for the first time on 31 August from the Jiuquan launch centre in north-west China, and says it reached the orbit it was aiming for. Pallas-1 can lift about 7,000 kilograms to low orbit, a few hundred kilometres up.
Galactic Energy began listing preparation in October 2025 and has not yet filed an application. It wants to try landing a first stage late this year.
The US Space Force had not added Pallas-1's upper stage or any payload to its catalogue of objects in orbit as of late Thursday, which is unusual after a launch that worked. Jonathan McDowell, who keeps a widely followed record of spaceflight activity, wrote that he could not regard the launch as confirmed.
Why it matters. Watch whether the US Space Force logs Pallas-1's upper stage, or Galactic Energy publishes the orbit it reached, because either would settle whether the flight that counts toward a listing went as described.
A Chinese rocket stage broke apart in orbit
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The upper stage of a Chinese Long March 6C rocket has fragmented in orbit, less than two days after it delivered seven satellites on 24 August.
The tracking company LeoLabs spotted the break-up and estimated tens to hundreds of pieces. The Long March 6 family has done this before.
The US Space Force catalogued more than 1,200 pieces from two Long March 6A upper stages that came apart in 2022 and 2024.
Both rockets use the same engine, the YF-115, burning kerosene and liquid oxygen.
Why it matters
The stage sits low enough that the pieces should burn up in the atmosphere within a few years. Until they do, every satellite crossing that height has more to dodge.
Who pays
Operators flying at the Long March 6C stage's height
Tens to hundreds of new fragments crossing those orbits mean more warnings, more dodging and more fuel spent.
Nobody knows yet
How many pieces the Long March 6C upper stage broke into, and why it broke.
LeoLabs put it at tens to hundreds and no cause has been given. The same engine has been on two earlier break-ups in this rocket family.
1 source
A Chinese rocket stage broke apart in orbit
The full story
A Chinese rocket stage broke apart in orbit
The upper stage of a Chinese Long March 6C rocket has fragmented in orbit, less than two days after it delivered seven satellites on 24 August. The tracking company LeoLabs spotted the break-up and estimated tens to hundreds of pieces. The Long March 6 family has done this before. The US Space Force catalogued more than 1,200 pieces from two Long March 6A upper stages that came apart in 2022 and 2024. Both rockets use the same engine, the YF-115, burning kerosene and liquid oxygen.
Why it matters. The stage sits low enough that the pieces should burn up in the atmosphere within a few years. Until they do, every satellite crossing that height has more to dodge.
NASA looks at buying rockets in blocks
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NASA is folding almost all of its launch buying into one new office, called Commercial Access to Space, and is weighing orders in bulk.
Pete Wilczynski, the official there responsible for science missions, said the agency may buy five, ten, fifteen or twenty rockets in a single purchase.
Until now it has bought rides mission by mission.
The US Space Force already works this way, promising SpaceX and United Launch Alliance a set number of launches over several years.
Why it matters
Supporters say a guaranteed order book brings the price down and gives launch companies assured business, which matters most to new entrants.
Why it matters
It also means NASA commits the money long before the flights.
How it works
Why the money is decided before anyone can see whether it works
How it works
A rocket costs almost all its money before it flies once, so buyers judge it on something earlier - and companies aim at that instead.
How it works · step 1 of 5
Building a rocket costs years of money
How it works · step 2 of 5
The flight that would settle whether it works comes at the end
How it works · step 3 of 5
So the people paying pick something earlier to judge on
How it works · step 4 of 5
A contract won, an engine test, a landed booster, a filing accepted
How it works · step 5 of 5
Companies aim at that earlier thing, because that is where the money is
The twist
China skipped the stand-in. Its stock exchange made an actual flight the condition, so a Chinese rocket firm's next launch date is also the date its share sale can move.
Seen the same day
the same step, one buyer along: NASA would commit to five or twenty launches at once, so what it judges is the company, not any of the flights it is paying for
Seen the same day
the money came first, in the order this chain describes: Isar has 200 million euros from the European Space Agency and its rocket has never reached orbit
Seen the same day
a $78 million building is going up at Cape Canaveral for a rocket that has not flown since May, because the contract was judged years before the flights
Seen the same day
the same argument at the other end, aimed at governments: a 144-page case for what the agency will do, written to be read before the money is voted
The catch
A stand-in can be a good one. Landing a booster really does show a company can land boosters.
The catch
The trouble starts when a company can pass the test without being able to do the job the test was standing in for.
The whole
Nobody here is cheating.
The whole
A Chinese regulator, a NASA buying office and a European agency each have to hand out money now, and none of them can wait for the flight.
The whole
Most of us have been judged the same way at least once, on a school result or a job title, by someone who had to decide before they could know.
Why it works on people
A rocket launch comes with video and a countdown. A line that never appears in a tracking catalogue comes with nothing to look at, so the success is seen by millions and the doubt by almost nobody.
Who gains
SpaceX and United Launch Alliance
NASA is looking at the bulk-buying scheme the US Space Force already runs, which guarantees those two a set number of launches over several years.
Nobody knows yet
Whether NASA will actually buy rockets in blocks, and how many at a time.
An official named five, ten, fifteen and twenty as possibilities. No purchase has been announced and the new office was only set up this year.
1 source
NASA looks at buying rockets in blocks
The full story
NASA looks at buying rockets in blocks
NASA is folding almost all of its launch buying into one new office, called Commercial Access to Space, and is weighing orders in bulk. Pete Wilczynski, the official there responsible for science missions, said the agency may buy five, ten, fifteen or twenty rockets in a single purchase. Until now it has bought rides mission by mission. The US Space Force already works this way, promising SpaceX and United Launch Alliance a set number of launches over several years.
Why it matters. Supporters say a guaranteed order book brings the price down and gives launch companies assured business, which matters most to new entrants.
India's high-orbit imaging satellite is away
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India's GSLV Mark II rocket lifted off from the Satish Dhawan Space Centre on 3 September and released the EOS-05 satellite about 18 minutes later.
The 2,367-kilogram spacecraft is on its way to geosynchronous orbit, 35,786 kilometres up, where a satellite circles at the same rate the Earth turns and so stays above one spot.
It is India's first imaging satellite sent to that height, and its telescope resolves detail down to about 42 metres.
Why it matters
India lost the satellite EOS-05 replaces when the same rocket's third stage failed in 2021.
Why it matters
From that height it can watch the subcontinent and its borders continuously instead of waiting to pass overhead.
Who gains
India's navy
EOS-05 is meant for civilian and military use, and the Economic Times reported the Indian Navy's interest in a constant watch on the subcontinent and its borders from 35,786 kilometres up.
Nobody knows yet
Whether India's EOS-05 reaches its final orbit.
The rocket left it in a transfer orbit below the target, so the satellite has to raise itself the rest of the way over the coming weeks.
Good news
India's GSLV Mark II put an imaging satellite on its way to a 35,786-kilometre orbit on 3 September. The same rocket lost the satellite this one replaces in 2021, and has now flown five times in a row without failing.
2 sources
India's high-orbit imaging satellite is away
The full story
India's high-orbit imaging satellite is away
India's GSLV Mark II rocket lifted off from the Satish Dhawan Space Centre on 3 September and released the EOS-05 satellite about 18 minutes later. The 2,367-kilogram spacecraft is on its way to geosynchronous orbit, 35,786 kilometres up, where a satellite circles at the same rate the Earth turns and so stays above one spot. It is India's first imaging satellite sent to that height, and its telescope resolves detail down to about 42 metres.
Why it matters. India lost the satellite EOS-05 replaces when the same rocket's third stage failed in 2021. From that height it can watch the subcontinent and its borders continuously instead of waiting to pass overhead.
A budget request would cut NASA science by nearly half
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The US president's budget request for 2027 would cut NASA's science spending by 46%.
The Planetary Society, a space advocacy group campaigning against it, says up to 53 missions would end, close to half of NASA's science fleet. Nothing is settled.
On 1 September the US House of Representatives voted 370 to 38 for a stopgap bill that funds US federal agencies to 11 December at flat rates.
Congress is unlikely to take up the 2027 budget before the November elections.
Why it matters
The Planetary Society expects no substantial action on the 2027 budget for the rest of this Congress.
Why it matters
Until that is settled, every NASA mission in today's edition is waiting on it.
Nobody knows yet
What will happen to the proposed 46% cut to NASA's science budget.
Congress is funding the US government at flat rates only to 11 December, and is not expected to take up the 2027 budget before the November elections.
The full story
A budget request would cut NASA science by nearly half
The US president's budget request for 2027 would cut NASA's science spending by 46%. The Planetary Society, a space advocacy group campaigning against it, says up to 53 missions would end, close to half of NASA's science fleet. Nothing is settled. On 1 September the US House of Representatives voted 370 to 38 for a stopgap bill that funds US federal agencies to 11 December at flat rates. Congress is unlikely to take up the 2027 budget before the November elections.
Why it matters. The Planetary Society expects no substantial action on the 2027 budget for the rest of this Congress.
New Horizons may stop sending solar-wind data
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New Horizons, the NASA probe that flew past Pluto in 2015 and is now in the Kuiper Belt beyond it, may lose one of its two science programmes in October.
Two instruments, SWAP and PEPSSI, have measured the solar wind without a break since 2006.
That side of the mission needs about $2 million a year for staff and for bringing the data down, and has not had it since 2024.
Alan Stern, who leads the mission, says the probe reaches the shock front where the solar wind slows within a couple of years, and the outer edge of the Sun's bubble within about ten.
Why it matters
Stern says these two instruments are the only chance anyone will have to measure those boundaries and then study interstellar space after the Voyagers, which carry older instruments.
Who pays
Researchers who study the solar wind
New Horizons' SWAP and PEPSSI have an unbroken record since 2006 and may stop in October for want of about $2 million a year.
Nobody knows yet
Whether New Horizons keeps sending solar-wind data past October.
The instruments work. The roughly $2 million a year to staff mission control and bring the data down has not been found since 2024, and no decision has been published.
1 source
New Horizons may stop sending solar-wind data
The full story
New Horizons may stop sending solar-wind data
New Horizons, the NASA probe that flew past Pluto in 2015 and is now in the Kuiper Belt beyond it, may lose one of its two science programmes in October. Two instruments, SWAP and PEPSSI, have measured the solar wind without a break since 2006. That side of the mission needs about $2 million a year for staff and for bringing the data down, and has not had it since 2024. Alan Stern, who leads the mission, says the probe reaches the shock front where the solar wind slows within a couple of years, and the outer edge of the Sun's bubble within about ten.
Why it matters. Stern says these two instruments are the only chance anyone will have to measure those boundaries and then study interstellar space after the Voyagers, which carry older instruments.
BepiColombo lets go after eight years
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BepiColombo, a joint European and Japanese mission to Mercury, has separated from the module that carried and powered it since 2018.
Europe's MPO orbiter and Japan's Mio orbiter are now on their own for a six-month approach.
They enter orbit around Mercury on 21 November, then run 16 manoeuvres to lower and reshape it, and begin science on 6 April 2027.
Getting there took one flyby of Earth, two of Venus and six of Mercury.
Why it matters
A spacecraft falling towards the Sun keeps speeding up, so most of a trip to Mercury is spent shedding speed rather than gaining it.
Why it matters
That is why the arrival takes six months.
Good news
BepiColombo let go of the module that had carried it since 2018. Its two orbiters reach Mercury on 21 November and start work in April 2027.
1 source
BepiColombo lets go after eight years
The full story
BepiColombo lets go after eight years
BepiColombo, a joint European and Japanese mission to Mercury, has separated from the module that carried and powered it since 2018. Europe's MPO orbiter and Japan's Mio orbiter are now on their own for a six-month approach. They enter orbit around Mercury on 21 November, then run 16 manoeuvres to lower and reshape it, and begin science on 6 April 2027. Getting there took one flyby of Earth, two of Venus and six of Mercury.
Why it matters. A spacecraft falling towards the Sun keeps speeding up, so most of a trip to Mercury is spent shedding speed rather than gaining it. That is why the arrival takes six months.
Europe's Spectrum rocket gets a second try
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Isar Aerospace, a German company, has a week-long window to launch its Spectrum rocket from Andoya in northern Norway, opening on Friday.
The first Spectrum flew for about 30 seconds in 2025 before failing. This one carries several CubeSats, small satellites built to a standard box size.
Norway is in national mourning for King Harald V, and Norway's government said the flight may go ahead before his funeral on 9 September.
Isar won a 200 million euro contract from the European Space Agency last month.
Why it matters
None of Europe's launch startups has reached orbit.
Why it matters
Isar, Spain's PLD Space and Rocket Factory Augsburg all won agency contracts this year, and Isar is the one now standing on a pad.
How it works
the money came first, in the order this chain describes: Isar has 200 million euros from the European Space Agency and its rocket has never reached orbit
The idea, in story 3: Why the money is decided before anyone can see whether it works →Nobody knows yet
Whether Isar Aerospace's Spectrum flew in its Norwegian window.
The week-long window opened on Friday, and Isar has been stopped several times since January by technical problems and by the range not being free.
1 source
Europe's Spectrum rocket gets a second try
The full story
Europe's Spectrum rocket gets a second try
Isar Aerospace, a German company, has a week-long window to launch its Spectrum rocket from Andoya in northern Norway, opening on Friday. The first Spectrum flew for about 30 seconds in 2025 before failing. This one carries several CubeSats, small satellites built to a standard box size. Norway is in national mourning for King Harald V, and Norway's government said the flight may go ahead before his funeral on 9 September. Isar won a 200 million euro contract from the European Space Agency last month.
Why it matters. None of Europe's launch startups has reached orbit. Isar, Spain's PLD Space and Rocket Factory Augsburg all won agency contracts this year, and Isar is the one now standing on a pad.
Blue Origin starts a hangar while its rocket is grounded
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Blue Origin, Jeff Bezos's rocket company, broke ground on a satellite processing building at Cape Canaveral in Florida.
The 120,000-square-foot hangar was ordered by the US Space Force under a $78 million contract awarded last year and is due in 2028.
It will hold four bays for preparing satellites and two for sealing them inside a rocket, and any company flying military payloads can use it.
Blue Origin's own New Glenn rocket has not flown since its launch pad exploded in May.
Why it matters
A launch site's buildings get used by everyone who flies from it.
Why it matters
This one is paid for by the US Space Force and will serve Blue Origin's rivals as well as Blue Origin.
How it works
a $78 million building is going up at Cape Canaveral for a rocket that has not flown since May, because the contract was judged years before the flights
The idea, in story 3: Why the money is decided before anyone can see whether it works →Who gains
Blue Origin
A $78 million US Space Force contract pays it to build a satellite hangar at Cape Canaveral while its own New Glenn rocket is grounded.
1 source
Blue Origin starts a hangar while its rocket is grounded
The full story
Blue Origin starts a hangar while its rocket is grounded
Blue Origin, Jeff Bezos's rocket company, broke ground on a satellite processing building at Cape Canaveral in Florida. The 120,000-square-foot hangar was ordered by the US Space Force under a $78 million contract awarded last year and is due in 2028. It will hold four bays for preparing satellites and two for sealing them inside a rocket, and any company flying military payloads can use it. Blue Origin's own New Glenn rocket has not flown since its launch pad exploded in May.
Why it matters. A launch site's buildings get used by everyone who flies from it. This one is paid for by the US Space Force and will serve Blue Origin's rivals as well as Blue Origin.
Europe's space agency signals it will lean on a satellite merger
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Airbus, Thales and Leonardo want to combine their satellite-making arms into one company, a deal codenamed Project Bromo that is waiting on competition regulators.
Josef Aschbacher, who runs the European Space Agency, would not say whether he supports it.
He did say the agency accounts for about 60% of public spending on satellites in Europe and can use industrial policy to keep the industry healthy.
Germany's OHB, the biggest European satellite maker left outside the deal, says it could weaken its suppliers.
Why it matters
Aschbacher is describing a buyer's power, not a regulator's. The agency does not approve the merger, and it decides who gets the orders afterwards.
Who pays
OHB
Germany's satellite maker says the Airbus, Thales and Leonardo merger could weaken the suppliers it depends on.
1 source
Europe's space agency signals it will lean on a satellite merger
The full story
Europe's space agency signals it will lean on a satellite merger
Airbus, Thales and Leonardo want to combine their satellite-making arms into one company, a deal codenamed Project Bromo that is waiting on competition regulators. Josef Aschbacher, who runs the European Space Agency, would not say whether he supports it. He did say the agency accounts for about 60% of public spending on satellites in Europe and can use industrial policy to keep the industry healthy. Germany's OHB, the biggest European satellite maker left outside the deal, says it could weaken its suppliers.
Why it matters. Aschbacher is describing a buyer's power, not a regulator's. The agency does not approve the merger, and it decides who gets the orders afterwards.
NASA is teaching astronauts to steer by the stars
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NASA is looking again at the sextant, a hand-held instrument about 300 years old that measures the angle between two things in the sky so a navigator can work out where they are.
Greg Holt, who manages navigation for the Orion capsule, told the BBC that the further a crew travels, the less they can lean on Earth-based systems.
In 2018 two astronauts on the space station, Serena Aunon-Chancellor and Alexander Gerst, tested a hand-held sextant in orbit.
Why it matters
A crew far from Earth that loses radio contact also loses the radio ranging that tells the ground where they are.
Why it matters
The stars are the one reference still available to them.
1 source
NASA is teaching astronauts to steer by the stars
The full story
NASA is teaching astronauts to steer by the stars
NASA is looking again at the sextant, a hand-held instrument about 300 years old that measures the angle between two things in the sky so a navigator can work out where they are. Greg Holt, who manages navigation for the Orion capsule, told the BBC that the further a crew travels, the less they can lean on Earth-based systems. In 2018 two astronauts on the space station, Serena Aunon-Chancellor and Alexander Gerst, tested a hand-held sextant in orbit.
Why it matters. A crew far from Earth that loses radio contact also loses the radio ranging that tells the ground where they are. The stars are the one reference still available to them.
Swift's third telescope is still dark
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Two of the three instruments on NASA's Swift observatory started working again on 26 August, after seven months switched off to slow the spacecraft's fall through the thin upper air.
The third, the Burst Alert Telescope, remains off; it was stopped in April to save power. NASA says the team hopes to restart it within weeks.
Swift launched in 2004, and a mission to grab it and raise its orbit was abandoned in August after the rescue craft lost attitude control.
Why it matters
The Burst Alert Telescope is the instrument that catches sudden explosions in the sky and tells other telescopes where to look. Until it is back, Swift cannot do that job.
Good news
Two of Swift's three telescopes began observing again on 26 August, after seven months switched off to slow the spacecraft's fall.
1 source
Swift's third telescope is still dark
The full story
Swift's third telescope is still dark
Two of the three instruments on NASA's Swift observatory started working again on 26 August, after seven months switched off to slow the spacecraft's fall through the thin upper air. The third, the Burst Alert Telescope, remains off; it was stopped in April to save power. NASA says the team hopes to restart it within weeks. Swift launched in 2004, and a mission to grab it and raise its orbit was abandoned in August after the rescue craft lost attitude control.
Why it matters. The Burst Alert Telescope is the instrument that catches sudden explosions in the sky and tells other telescopes where to look. Until it is back, Swift cannot do that job.
A student balloon flies for the twentieth year
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NASA launched its High-Altitude Student Platform on a scientific balloon from Fort Sumner in New Mexico at 8:05 a.m. local time.
The balloon carried student-built experiments to about 122,000 feet and stayed up for 6 hours and 45 minutes. It was the twentieth flight of the programme.
Over two decades more than 1,900 students from about 25 institutions in the United States have flown an experiment on it. It is run with the Louisiana Space Grant Consortium.
Why it matters
The programme is run with the Louisiana Space Grant Consortium and NASA's balloon office in Texas.
Why it matters
At that height the air is thin enough for some instruments to behave much as they would in space, for a tiny fraction of what a launch costs.
Good news
A NASA balloon carried student-built experiments to about 122,000 feet over New Mexico for the twentieth year running. More than 1,900 students from about 25 institutions have flown something on it.
The full story
A student balloon flies for the twentieth year
NASA launched its High-Altitude Student Platform on a scientific balloon from Fort Sumner in New Mexico at 8:05 a.m. local time. The balloon carried student-built experiments to about 122,000 feet and stayed up for 6 hours and 45 minutes. It was the twentieth flight of the programme. Over two decades more than 1,900 students from about 25 institutions in the United States have flown an experiment on it. It is run with the Louisiana Space Grant Consortium.
Why it matters. The programme is run with the Louisiana Space Grant Consortium and NASA's balloon office in Texas.
A quiet supersonic jet passes 25 test flights
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NASA's X-59 experimental aircraft has now flown 25 test flights and is meeting the marks its team set.
Later this year it moves to a new phase in which NASA measures the sonic thumps it is designed to make when flying faster than sound.
The aircraft is shaped so the shock waves spread out instead of arriving together, which is what turns a bang into a thump.
Why it matters
Airliners are barred from flying faster than sound over land in many countries because of the bang. Any new rule would have to be written around measurements like these.
The full story
A quiet supersonic jet passes 25 test flights
NASA's X-59 experimental aircraft has now flown 25 test flights and is meeting the marks its team set. Later this year it moves to a new phase in which NASA measures the sonic thumps it is designed to make when flying faster than sound.
Why it matters. Airliners are barred from flying faster than sound over land in many countries because of the bang. Any new rule would have to be written around measurements like these.
A founder of China's rocket programme died at 93
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Liu Jiyuan, a pioneer of China's aerospace programme, died in Beijing at 93 after an illness, the country's main space contractor said on Wednesday.
Reuters carried the announcement the same day. He belonged to the generation that built China's state rocket and satellite programme, the one the country's launch industry grew out of.
Why it matters
The firms now queuing to sell shares came from that programme. CAS Space, one of them, is a spin-off of the Chinese Academy of Sciences.
2 sources
A founder of China's rocket programme died at 93
The full story
A founder of China's rocket programme died at 93
Liu Jiyuan, a pioneer of China's aerospace programme, died in Beijing at 93 after an illness, the country's main space contractor said on Wednesday. Reuters carried the announcement the same day. He belonged to the generation that built China's state rocket and satellite programme, the one the country's launch industry grew out of.
Why it matters. The firms now queuing to sell shares came from that programme. CAS Space, one of them, is a spin-off of the Chinese Academy of Sciences.
ESA publishes the book it gave its ministers
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The European Space Agency has put the first chapter of Elevation online.
It is a 144-page book handed to European ministers and delegates at the agency's ministerial council in Bremen, Germany, and it sets out the agency's work through Strategy 2040, the plan written by its director general Josef Aschbacher.
The remaining chapters follow over the coming weeks. A ministerial council is where member governments agree what the agency will do and what they will pay for.
Why it matters
A ministerial council is where ESA's member governments agree what the agency will do and what each of them will pay for.
Why it matters
The book is the case being made to the people in that room.
How it works
the same argument at the other end, aimed at governments: a 144-page case for what the agency will do, written to be read before the money is voted
The idea, in story 3: Why the money is decided before anyone can see whether it works →The full story
ESA publishes the book it gave its ministers
The European Space Agency has put the first chapter of Elevation online. It is a 144-page book handed to European ministers and delegates at the agency's ministerial council in Bremen, Germany, and it sets out the agency's work through Strategy 2040, the plan written by its director general Josef Aschbacher. The remaining chapters follow over the coming weeks. A ministerial council is where member governments agree what the agency will do and what they will pay for.
Why it matters. A ministerial council is where ESA's member governments agree what the agency will do and what each of them will pay for.
The truth, across the day
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Nobody knows yet
Whether Rocket Lab launched Japan's Strix radar satellite on 2 September.
The flight had already slipped from 31 August, and the report we have was written before the window opened.
1 source
The truth, across the day
That's the whole Space day.
16 stories, 15 sources.