Space · Monday, 19 October 2026
Japan's MMX spacecraft is set to launch tonight to bring the first soil home from Phobos, a moon of Mars
Japan's space agency plans to launch MMX at 19:41 GMT on Monday, to land on Phobos, scoop up at least 10 grams of its soil and return it to Australia in 2031.
10 g
of Phobos soil, at the least, that MMX aims to carry home
collected in two landings with two different samplers
1/2,000
of Earth's gravity is all that Phobos has
so the lander has shock-absorbing legs to keep it from bouncing away
0.1%
of the soil is expected to be grains of Mars itself
thrown up to Phobos by old impacts on the planet, JAXA says
2031
when the capsule should parachute into Woomera, South Australia
the trip there and back takes about five years
The lead story — what happened
-
Japan's space agency, JAXA, plans to launch its MMX spacecraft at 19:41 GMT on Monday 19 October, which is 04:41 on Tuesday in Japan.
[3] [1] -
It will ride the H3, Japan's new main rocket, from Tanegashima Space Center, a launch site on an island in southern Japan.
[3] [2] -
The plan is to land on Phobos, the larger of Mars's two small moons, collect at least 10 grams of its soil and bring it to Earth in 2031.
[3] [4] -
That would be the first sample ever brought back from Mars or its moons.
[1] Several Russian attempts to land on Phobos, including one launched in 2011, failed.[2] -
Scientists have argued for more than a century about where Phobos came from.
[5] It is either a passing asteroid caught by Mars's gravity, or rubble thrown into orbit when something huge hit Mars.[1] -
The two ideas predict different chemistry, so the answer should be clear soon after the soil reaches a lab, says Sara Russell of the Natural History Museum, the mission's deputy for sample analysis.
[1] -
About 0.1% of the soil may be grains of Mars itself, blasted up to Phobos by old impacts on the planet, JAXA officials say.
[2] [4] -
Phobos has about one two-thousandth of Earth's gravity, so the spacecraft has four shock-absorbing legs to cut down bouncing when it lands.
[4] [2] -
First, a small four-wheeled rover called IDEFIX, built by the space agencies of France and Germany, will drop from about 40 metres up and explore for about 100 days.
[3] [2] [6] -
One of the two samplers is a NASA device that blows gas at the ground and catches the dust it throws up.
[2] It began as a prototype that members of the Planetary Society, a US public group that backs space science, paid for in 2013.[6] -
A NASA and European plan to fetch the rocks the Perseverance rover has collected on Mars was effectively cancelled when the US Congress stopped its money.
[1] China plans its own Mars sample trip, launching in 2028 and also returning in 2031.[1]
- 1Launch on the H32,027
- 2Arrives at Mars2,028
- 3Soil collected, from December 20282,029
- 4Leaves Mars2,031
- 5Capsule lands in Australia2,032
Who is involved
-
JAXA
Japan's space agency; it leads MMX and launches it on its own H3 rocket
-
Yasuhiro Kawakatsu
MMX project manager at JAXA; he calls Mars's moons "the most important unclimbed mountains in the solar system"
-
CNES and DLR
the space agencies of France and Germany; together they built the IDEFIX rover
-
NASA
the US space agency; it supplies a gas-blowing sampler and an instrument that reads Phobos's chemistry from orbit
-
The Planetary Society
a US public group that funds space science; its members paid for the sampler's first full prototype
How it unfolded
-
2013 Planetary Society members pay for the first full prototype of the gas-blowing sampler
[6] -
19 Oct 2026 MMX launches on an H3 at 19:41 GMT from Tanegashima
[3] -
Aug 2027 it reaches Mars and starts flying alongside Phobos
[3] [1] -
Dec 2028 the earliest date for collecting soil, says the acting head of NASA's planetary science
[3] -
2030 it leaves Mars, passing the smaller moon Deimos on the way
[3] [6] -
2031 the capsule parachutes into Woomera, South Australia
[1] [3]
Where this points
The first test is whether the H3 lifts off on time tonight; the harder one comes at Phobos, where NASA says soil could be collected from December 2028 at the earliest.
What is pushing on the whole day
The bar and the word are our reading of how hard each one is pushing today. The arrow is where it is heading. The evidence is in the stories below.
MMX will carry Phobos soil home in a capsule built to survive the heat of hitting Earth's air.
Blood from ten astronauts showed that spaceflight changed more genes in the younger crew members.
MMX carries 13 instruments from Japan, the US, France, Germany and Europe's space agency.
The rest of the day
6 more stories on this beat.
Each with its own sources. None of these is a link to the story above.
-
02
SpaceX flies a second Starfall capsule
SpaceX is due to launch Bandwagon-5, a shared ride on its Falcon 9 rocket, from Cape Canaveral in Florida at 10:30 UTC.
[8] [9] Its 32 payloads include SpaceX's second Starfall, a flat disc 3.1 metres wide and 0.75 metres tall that can bring up to 1,000 kg home under a parachute.[9] SpaceX has not said what this one carries.[8] Varda's W-7, a much smaller capsule, carries a new cancer drug called PROTAC to see whether it forms better crystals in weightlessness.[8] It can reach up to 25 times the speed of sound coming home.[9] Why it matters — A capsule that waits in orbit and lands when told turns a trip to space into a delivery service for drugs and experiments.
[9] Forecasters gave the weather only a 55% chance of being good enough to launch.[8] -
03
Starship's next two flights get dates
SpaceX aims to fly Starship Flight 15 no earlier than 8 November, and Elon Musk says it will try to catch both the booster and the upper stage.
[10] SpaceX has caught boosters at Starbase, its Texas site, but never tried with the upper stage.[7] Engines were taken off that flight's upper stage for an extra test with super-cold liquid, possibly linked to an engine software fault on Flight 14, reports NASASpaceflight, a space news site.[10] Flight 16 is aimed at December and could be the first Starship launch from Florida.[10] Starship launches planned in 20265Launches a year Starbase may host now25Even with two more flights, this year ends far below the limit SpaceX already has in Texas. Why it matters — That would make only five Starship launches in 2026, against 25 a year Starbase is already allowed.
[10] Catching the upper stage would open the way to flying a used one again, NASASpaceflight says.[10] -
04
Younger astronauts' genes changed more
A study of blood from ten astronauts on the International Space Station found that spaceflight changed the activity of more genes in the younger crew members.
[12] The astronauts were 34 to 61 years old at launch, and their blood was taken between 75 and 210 days into their missions.[12] Longer missions changed more genes too.[12] Younger astronauts also showed more strain in mitochondria, the parts of a cell that make its energy.[12] The NASA-led team published it on 12 October in npj Microgravity, a journal about life in weightlessness.[12] - 1Youngest astronaut at launch34 years
- 2Oldest astronaut at launch61 years
Ten crew members, 27 years apart at the ends. The younger ones showed the bigger changes. Why it matters — The authors say nobody yet knows whether the stronger response helps the body or harms it.
[12] The last blood samples were taken at 210 days, so the study cannot show what happens on longer trips.[12] -
05
Space plants bred to cope better
Small plants grown on the space station showed fewer signs of stress when they were bred to build up putrescine, a natural chemical that plants make, a University of Wisconsin-Madison team reports.
[13] The plants were thale cress, a small weed scientists use as a standard lab plant.[13] Ordinary seedlings in orbit grew longer leaf stalks, a sign usually seen in plants short of oxygen, and switched on many stress genes.[13] The bred plants switched on fewer stress genes, and their stalks stretched less.[13] The paper came out on 15 October.[13] Why it matters — Long trips will need plants that grow food and refresh the air for crews far from Earth, and the authors say changing this chemical's pathway could help.
[13] -
06
Artemis II crew wins the Hawking Medal
The four astronauts who flew around the Moon on Artemis II this year received the Stephen Hawking Medal for science communication on Saturday 17 October.
[11] NASA's Reid Wiseman and Victor Glover and Canada's Jeremy Hansen collected it at the opening of Starmus, a science festival in Tenerife, in Spain's Canary Islands.[11] NASA's Christina Koch, the fourth crew member, was not there.[11] Stephen Hawking and Starmus set up the medal in 2016, and earlier winners include Buzz Aldrin, David Attenborough and Jane Goodall.[11] Why it matters — The prize is for sharing the flight with people on the ground, through live calls, interviews and photos from the trip.
[11] Film director Ridley Scott was also honoured in this, the medal's tenth year.[11] -
07
Pakistan names a date for its first astronaut
Pakistan's first astronaut will fly from a Chinese launch site on 25 November, Ahsan Iqbal, Pakistan's planning minister, said on Sunday.
[14] The astronaut will be one of two Pakistani pilots, Zeeshan Ali and Khurram Daud, whom China picked in April and has been training in Beijing.[14] China itself has not said which of them will fly, or when.[14] In orbit the chosen pilot will run Pakistan's science experiments rather than fly the spacecraft, an official at Suparco, Pakistan's space agency, told Reuters.[14] Why it matters — The spacecraft, the launch site, the trainers and the language spoken in orbit are all Chinese, so the date depends on China's own plans.
[14] Iqbal also said Pakistan aims to land on the Moon by 2035.[14]
Why a capsule coming home from space is blunt, not pointed
A capsule falling from orbit is too fast to slow gently, so its wide, flat front piles up squeezed air ahead that takes most of the heat.
The twist
A pointed nose would let the hottest air touch its tip, and the tip would burn away. A blunt front keeps that air a little way off, so most of the heat is carried around the capsule instead of into it.
The picture
How it works
- A capsule coming home from orbit is moving at up to 25 times the speed of sound
- To land, it must lose almost all of that speed in the air
- The air in front cannot get out of the way, so it is squeezed and gets very hot
- A wide, flat front makes that squeezed air pile up a short distance ahead of the capsule
- Most of that heat flows away around the sides with the air, instead of into the capsule
- A heat shield takes what is left, and a parachute does the slow last part
The same force, elsewhere today
Where this chain is also running, in today's other stories.
-
SpaceX's second Starfall capsule
It is a disc 3.1 metres wide and only 0.75 metres tall, so it meets the air with its broad face before a parachute takes over.
-
Varda's W-7 capsule
It comes home at up to 25 times the speed of sound, and its front must keep that heat away from the drug crystals inside.
-
Japan's MMX
Only its small return capsule comes home, built to survive the heat of hitting Earth's air before a parachute sets it down in Australia.
-
Starship's catch attempt
SpaceX wants to catch the upper stage after its fall through the air and fly it again, so the whole craft, not just a small capsule, has to come through the heat.
Where you've seen this
Parachutes
a wide canopy is the blunt front at low speed: it meets as much air as it can, so it slows down
Skydivers
spreading arms and legs flat makes a body meet more air, so it falls more slowly
Shooting stars
a grain of comet dust glows because the air squeezed in front of it gets hot, and a small grain burns away completely
The catch
A blunt front lowers the heat that gets in but does not remove it, so the heat shield still takes a great deal. A capsule coming back from Mars, like MMX's, arrives even faster than one coming down from orbit.
And the whole of it
Every astronaut who has come home from orbit rode down behind a broad front like this. The scientists who will open the Phobos soil in 2031 are counting on a capsule falling through the air that nobody on the ground can steer once it begins.
What is really going on
Japan is about to try to bring back the first soil from Mars or its moons, after a NASA and European plan to fetch rocks from Mars itself lost its money in the US Congress.
Who gains
-
JAXA, Japan's space agency
— If the soil comes home in 2031, Japan holds the first material from Mars or its moons, with the NASA and European plan cancelled.
[1] -
Honeybee Robotics, owned by Blue Origin
— Its gas-blowing sampler, first paid for by Planetary Society members, flies to a moon of Mars on MMX.
[6] -
SpaceX
— Starfall adds a second business to launching: bringing research and products back from orbit, up to 1,000 kg a trip.
[9] -
Exolaunch, a company that books rocket space for satellites
— It arranged 22 of the 32 payloads on today's Falcon 9, and has arranged 890 payloads on rockets so far.
[9] -
Xona Space Systems
— Its four Pulsar satellites on today's flight start a planned fleet of about 250, selling a location signal at least 100 times stronger than GPS.
[9]
Who pays
-
Scientists who chose the Perseverance rover's Mars samples
— Their rock tubes sit on Mars with no ride home, since the plan to fetch them was effectively cancelled when US money stopped.
[1] -
Satellite companies waiting for Starship
— Operators fear a shortage of rides as SpaceX moves from Falcon 9 to Starship, and Starship flies only five times in 2026.
[7] [10] -
Younger astronauts
— Their blood showed more genes thrown off course in space, and more strain on the parts of their cells that make energy.
[12] -
Small satellite companies
— They pay $350,000 to fly up to 50 kg on a SpaceX shared ride, and go when SpaceX and the weather allow.
[9] [8]
What nobody knows yet
Open questions from across today’s stories — ours included.
-
01
Whether MMX gets off the ground tonight.
The launch is set for 19:41 GMT, after this edition went out, and none of our sources gave a weather forecast for it.
[3] -
02
What Phobos is made of, and so where it came from.
Its shape and surface look like an asteroid's, but its round orbit over Mars's equator fits rubble from an impact, and no sample has ever been studied.
[5] [3] -
03
Whether a wheeled rover can drive on Phobos at all.
IDEFIX is the first rover sent to so small a world, and finding out whether wheels work in such weak gravity is part of its job.
[5] -
04
How wide Phobos is.
Our sources give about 20 km across and about 27 km at its widest, because it is lumpy and each measures a different way.
[1] [2] -
05
What SpaceX's second Starfall capsule is carrying.
SpaceX did not say what, if anything, is on board this flight.
[8] -
06
Whether Varda's cancer drug comes back in a better form.
Varda is testing whether PROTAC crystals grown in weightlessness dissolve better, and the answer waits on the capsule landing.
[8] [9] -
07
Whether the bigger gene changes in younger astronauts help or harm.
The authors say this still has to be found out, and the study covered only ten people.
[12] -
08
Whether SpaceX can catch a Starship upper stage, and fly from Florida this year.
It has never tried the catch, and much first-time work at its Florida pad still has to succeed, NASASpaceflight reports.
[7] [10]
Members of the Planetary Society paid in 2013 for the first full prototype of a sampler that blows gas at the ground. A version of it is on board MMX, due to launch tonight for a moon of Mars.
Also true today
- The four astronauts who flew around the Moon on Artemis II received the Stephen Hawking Medal on Saturday for sharing their trip with people on Earth.
- Small plants bred to make more putrescine switched on fewer stress genes on the space station than ordinary plants did.
More from Space
Across the beats