
Professor in the School of Earth & Space Exploration at ASU. Planetary scientist. Sending a tiny spacecraft to the Moon to map water @lunahmap.
Tempe, AZ
Joined May 2008
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NASA should apply the CLPS mindset of low-cost, fast-turnaround, commercial partnerships not just to lunar landers, but also to science missions and instruments. Iteration and risk tolerance accelerate lunar access—let's do the same for payloads. Thoughts?
spacenews.com/why-nasa-shoul…
Craig retweeted
If you care about science at NASA, this is royally sucks.
arstechnica.com/space/2025/0…
Craig retweeted
Over 200 JPLers have lost everything. Every single project I work on includes at least one, most multiple. Everyone at JPL is affected, everyone is utterly heartbroken for our community.
Ways you can help: giving.caltech.edu/areas-to-…
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Craig retweeted
We have a ride to the Moon! Exciting news for Lunar-VISE!!! 🚀@FireflyAerospace has been selected as the official lander and rover provider that will take us to the lunar surface in 2028!
#LunarVISE #fireflyaerospace #ForwardtotheMoon
This team is unstoppable! Firefly was awarded another NASA CLPS task order for a third lunar mission in 2028. This time we'll utilize our Blue Ghost lander, Elytra Dark orbital vehicle, and a rover to investigate the unexplored Gruithuisen Domes. fireflyspace.com/news/firefl…
Craig retweeted
Somewhere in the Heavens the UESC Marathon awaits.
Marathon will be coming to PlayStation 5, Xbox Series X|S, and PC and is now available to wishlist on PlayStation 5 and Steam.
Craig retweeted
Pew, pew, pew! Do you see those five white circles on the rock? They’re laser blasts!
Last month, I zapped what might be another pure sulfur rock with my ChemCam instrument. It’ll analyze the elemental composition and could give us more clues into how the pure sulfur formed.
Craig retweeted
Wow, diffusion models (used in AI image generation) are also game engines - a type of world simulation.
By predicting the next frame of the classic shooter DOOM, you get a playable game at 20 fps without any underlying real game engine.
This video is from the diffusion model.
Craig retweeted
A quick reminder that @SESEASU is eligible to host @HSFdn #51PegbFellows in planetary astronomy. Applications for this postdoc opportunity are due Oct 4. More info here: hsfoundation.org/programs/sc…
Craig retweeted
What is a proton made of?
Early scattering experiments probing the substructure of the proton found an interesting result. Instead of being made just from point-like particles (quarks), there seemed to be more going on inside the proton
A🧵1/6
Craig retweeted
My 12-year landiversary is a few days away 🎉
From finding evidence Mars once had habitable environments to discovering rocks made of pure sulfur, I’ve done a lot since landing here in 2012.
Do you have any favorite moments of my journey?

ALT The Curiosity rover is shown in a selfie in a rocky area of Mars. The image is a rust color and the rover is lightly covered in Martian dust. It is slightly off center to the right and is staring at the camera on its robotic arm that took the photo. Next to the left side of the rover is a large reddish rock. In the background are small hills and haze along the horizon.
In science, just like in politics, it takes courage and integrity to do what you think is the right thing despite what it might mean for you personally. Power and authority are real. What you do with it and how you help others matters the most.
Craig retweeted
Thoroughly enjoyed this evening’s public panel at the #10thMars conference! Thanks for your perspectives, @minwadhwa, @PlanetaryNoora, @abbyfrae, @astro_watkins, and moderator @bethanyehlmann!
Craig retweeted
*Cronch* I ran over a rock and found crystals inside!
It's pure sulfur. (And no, it doesn’t smell.) Elemental sulfur is something we’ve never seen before on Mars. We don't know much about these yellow crystals yet, but my team is excited to investigate. go.nasa.gov/4bPdSow
Congrats Tom and Scout!
Happy Monday!
This week's PSI Planetary Pet is the well-trained and smart Scout, a 6-year-old Belgian Malinois, getting ready for a search. Scout and PSI's @PrettymanTom just passed the first of three tests required for Live-Find certification.
Craig retweeted
Classic Marathon is now on Steam!
Save the universe and remember to frog blast the vent core! Congrats to the Aleph One Developers!
store.steampowered.com/app/2…
Craig retweeted
Image of Apollo 11 and 12 taken by India's Moon orbiter. Disproving Moon landing deniers
A fantastic line of inquiry and fun to read the responses. While I’m a supporter of Moon and Mars exploration, I also think it’s important for planetary scientists and space explorers to be aware of the alternatives. This can only help strengthen their “why”.
Craig retweeted
The Exp 71 crew soared into the Moon’s shadow during the solar eclipse on Monday afternoon while working on cargo transfers, spacesuits, and science. More... go.nasa.gov/3xtBOzt
Station Orbits into Eclipse, Crew Works Research and Spacesuits
The Exp 71 crew soared into the Moon’s shadow during the solar #eclipse on Monday afternoon while working on cargo transfers, spacesuits, and science. More... https://go.nasa.gov/3xtBOzt
Craig retweeted
The stunning view of the umbra from the International Space Station. From NASA live.
#Eclipse2024






















