Lee Saper @lsaper
@NASAJPL | Planetary Science | Geochemistry & Petrology | Artemis Lunar Surface Science Team | Views are my own. leesaper.com Pasadena, CA Joined November 2012-
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Lee Saper retweeted
Photo finish! 🏁📸 On June 14, Perseverance completed a Martian “marathon” by surpassing 26.2 miles (42.195 kilometers) of travel. The day before, NASA’s Mars Reconnaissance Orbiter snapped this view of the rover and its tracks from space.
Lee Saper retweeted
Today marks 17 years since NASA's Lunar Reconnaissance Orbiter (LRO) began orbiting the Moon and collecting detailed data about its surface. Here's one of our favorite spots as seen by LRO: the Apollo 11 landing site featuring the descent stage of the lunar module at center!
Lee Saper retweeted
This Apollo 17 photo (AS17-146-22386) taken by mission commander Gene Cernan is particularly interesting, not because there are UAPs or UFOs in it but because we can see the LRV with Jack Schmitt at it and then waaaaaay in the distance, the LM is just a tiny little point of gold.
Lee Saper retweeted
Absolutely stunning views coming back from Curiosity today as she continues on up the valley she's exploring... look at the ground! Credits: NASA/JPL-Caltech/S Atkinson
Lee Saper retweeted
Absolutely stunning views coming back from Curiosity today as she continues on up the valley she's exploring... look at the ground! Credits: NASA/JPL-Caltech/S Atkinson
The magmatic component tells us that H isotopes were homogenized during formation of ancient Martian mantle reservoirs, while the hydrosphere component supports rapid H loss from the juvenile Martian atmosphere.
We used SIMS to measure ages and hydrogen isotopes in phosphate minerals from Teghaza 001. The phosphates record mixing between magmatic water and a D-rich component with an imprint of the ancient Martian hydrosphere.
Excited to share our new paper: A Noachian hydrosphere component in the 4.1-Ga Martian meteorite Teghaza 001. science.org/doi/10.1126/sc… Teghaza 001 is a rare piece of previously unsampled ancient Martian crust, a plagioclase-rich gabbroic rock that formed >4.1 billion years ago.
@astro_Pettit One my all time favorites of your videos / experiments
@ForrestMeyen @LunarOutpostInc Congrats Forrest! 🏎️
@willmenaker Playoffs got everybody pulling up from half court
We are still doing extraordinary things
POV: You’re coming home after a journey around the Moon. 🌕 Before reentering Earth’s atmosphere at the end of Artemis II, the Orion spacecraft’s crew module — carrying the astronauts — separated from the service module that provided propulsion and power throughout the mission.
Jaw-dropping 3D visualization of all known exoplanets in our cosmic neighborhood! Thinking about all the moons of those planets… eyes.nasa.gov/apps/exo/#/
Lee Saper retweeted
#Artemis II - Exploration Mission-2 Date taken 2026.04.07 ~00:34:18 GMT NIKON D5 eol.jsc.nasa.gov/SearchPhotos/p… Artemis II Crew / NASA JSC / ESRS / j. Roger
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