Lee Saper

“In our lifetimes”

@NASAMars @NASAJPL @NASASolarSystem Nice fresh secondaries in the CTX image ☄️

Ansel Adams on Mars? Some striking black-and-white images from four current NASA missions. 📸 1) A fissure in Elysium Planitia - MRO 2) A dust devil caught in Jezero Crater - Perseverance 3) Boxwork formations in Gale Crater - Curiosity 4) A channel in Arabia Terra - Odyssey

10,000 digits of π visualized in MATLAB! Code ➡️ spr.ly/6017h4fjJ #PiDay

@AJamesMcCarthy @fascinatingonX Why take literally one of the most fake-looking actually real things and make it look horrendous. Is the actual hexagon not insane/beautiful enough?

@fascinatingonX FYI this image is fake. Here are real photos of the hexagon, captured by Cassini

Working alongside JPL/Caltech, we've developed a Near-Earth Objects (NEO) Hunter mission concept for planetary defense using Blue Ring. NEO Hunter tests multiple asteroid-deflection techniques, including ion-beam deflection and robust direct kinetic impact, helping protect Earth from potential threats. This is another example of how commercial platforms like Blue Ring can conduct low-cost, high-priority science, exploration, and planetary defense missions.

On March 10, 2006, NASA’s Mars Reconnaissance Orbiter successfully entered Martian orbit. Check out this @NASAMars thread for some highlights from MRO’s 20 years (and counting!) at the Red Planet 🔽

@McMasterDaily Want

Outside Micrometer Holster $12.28 each 21145A21 Stay strapped, you never know when you'll have to measure something 🤠

@NASAAdmin This will also support science on A3 and beyond. More confidence in the suits, spacecraft and conops means more bandwidth for utilization activities (the good stuff!)

…and this is how we’re going back.

This is how we got to the Moon and did the near-impossible in the 1960s…

@DJSnM Pain

According to a NASA report Lunar Trailblazer failed because the software pointed the solar panels *away* from the Sun. The NASA panel says Lockheed did not properly test the solar panel pointing software before launch. npr.org/2026/02/26/nx-…

@astroEdLu “Tens” or “tenths”?!

JWST observes asteroid 2024YR4 again Feb 26. It will be a 5 hour 36 minute exposure! Probability of impact with the Moon in 2032 could drop to zero, or be as high a few tens of percent. We will see!

@AJamesMcCarthy This annoying thing photobombed my shot of Orion smh…

Who has the best cell phone camera for astrophotography? Can you get a better shot of the Orion Nebula than I did with my iPhone 17? The Orion Nebula is in Orion’s scabbard, visible from everywhere in the world this time of year (if you don’t have clouds)

@ThePrimalDino This is awesome

Service modules for Artemis III and Artemis IV. Artemis III is currently scheduled to be the first crewed lunar landing since Apollo 17, and Artemis IV is set to be the debut flight of the SLS block 1b rocket, delivering the IHAB module to the Lunar Gateway!

@Marco_Langbroek 13?!!

13 years ago #today, a small (~18 meter diameter) asteroid impacted over #Chelyabinsk, Russia, and exploded at 22 km altitude, shattering windows. Thousands of small (and a few larger) fragments like these rained down. It was the largest impact of the last 100 years.

@JohnHolbein1 Is it a COI if the research was conducted under the influence of caffeine?

Nutrition research is so broken.

NASA's Cassini spacecraft zoomed by Saturn's icy moon Enceladus on Oct. 14, 2015, capturing this stunning image of the moon's north pole jpl.nasa.gov/images/pia1966… #Space #Astronomy @CassiniSaturn

@astro_reid @USAspaceenjoyer Ha!

@USAspaceenjoyer Don’t tempt me.

A 360° ROLL????

@AJamesMcCarthy @EAR68 The A2 lunar flyby will be iconic

@EAR68 Sharing iconic moments from the broadcast will be important, if the launch is poorly timed there will be other opportunities to share the event

A plea to restaurant/bar owners: Treat the Artemis II launch like a sporting event. Put it on all your tvs. Let patrons celebrate the brave crew as they return to the moon for the first time in 54 years. This is a shared human success and should be experienced as such.

@RadishHarmers Imagine doing it twice and having 2 billion dollars

The sheer scale of a billion dollars can be hard to understand. Let me put it in perspective for you. You would have to earn a dollar a day for a billion days straight to have that much money.