engineer
Earth
Joined May 2017
- Tweets 165
- Following 156
- Followers 17,183
- Likes 208
Tune in now at nasa.gov/live to see @Astro_Christina and @Astro_Jessica replacing a failed power controller on the most critical power channel on @Space_Station. It's been amazing this week seeing the team at @NASA_Johnson adapting to this unexpected hardware issue.
Spacewalkers @Astro_Christina and @Astro_Jessica are outside in the vacuum of space getting their tools ready to replace a failed power controller that collects and distributes solar power to station systems. #AskNASA | nasa.gov/live
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During a recent three-ship formation training flight, @Astro_FarmerBob and I moved out of position briefly to capture this shot of @Astro_illini and @VicGlover flying over the SLS Pathfinder at @NASAStennis. Zoom in to see it!
NASA cleared a milestone in preparation for Green Run testing of its Space Launch System (SLS) core stage with an Aug. 23/24 lift and installation of the core stage pathfinder simulator onto the B-2 Test Stand at Stennis Space Center near Bay St. Louis, Miss.
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My chat with the Small Steps Giant Leaps podcast discussing @NASA_Astronauts training, my wonderful classmates, and thoughts on our return to the Moon, this time to stay. go.nasa.gov/2KMNBhJ
"I want the United States to land the first woman on the Moon."
🗣️Episode 17: ‘Astronaut Training’
@Astro_Woody discusses his experiences as the 2017 @NASA_Astronauts Class approaches the 2 year mark of extensive training for space travel. #Moon2024
🎧go.nasa.gov/2KMNBhJ
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Congrats team on a great EVA!
After 6 hours 32 mins, today's spacewalk with @AstroHague & @AstroDrewMorgan concludes. During this time, they installed a new docking port to the @Space_Station that will allow @Commercial_Crew vehicles from @BoeingSpace & @SpaceX to launch future crew: nitter.vloup.ch/i/broadcasts/1DX…
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Formation flights in @NASA T38's are a big step up in difficulty. As always, @Astro_FarmerBob was an amazing instructor as we joined our classmates @Astro_Raja, @Astro_Jenni, Jessica Watkins, and @Astro_Kutryk for super valuable afternoon of training.
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It was a huge honor talking with @AstroMCollins last week about his experiences on Apollo
50 years after his historic flight, Apollo 11 astronaut @AstroMCollins meets with our newest astronaut candidates from the class of 2017. They will be part of the team returning to the moon on #Artemis missions. Passing on wisdom from one generation of explorers to the next👨🚀🚀🌝
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Just watched the @apollo11movie and was blown away by what @NASA accomplished 50 years ago. Now we're going back to the Moon to stay, setting up a proving ground for getting humans to Mars.
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I wasn't alive to watch @NASA_Astronauts Armstrong, Collins, and Aldrin launch on their historic journey, but they sure inspired me - and my entire generation.
3, 2, 1 – Blast off!👨🚀🌙🚀
#OTD 50 years ago, Neil Armstrong, Michael Collins, and Buzz Aldrin left the planet to serve as the prime crew of the historic #Apollo11 lunar landing mission. #Apollo50th
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Happened to fly over Meteor Crater with @Astro_Raja on Friday just as the #MountainFire was starting in @TontoForest
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Two classmates out on a spacewalk together, so cool! Super inspired watching you guys out there @Astro_Christina and @AstroHague. Go 8 balls.
Spacewalkers Christina Koch (@Astro_Christina) and Nick Hague (@AstroHague) are setting up their work site with the South Atlantic Ocean passing 262 miles below. #AskNASA | nasa.gov/live
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Team effort: had a chance to see the room from which @csa_asc controllers work with @NASA_Johnson flight controllers to command robotic operations on the @Space_Station
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Super exciting news today!
…𝘵𝘰 𝘵𝘩𝘦 𝘔𝘰𝘰𝘯 𝘢𝘯𝘥 𝘣𝘢𝘤𝘬!🌙 @VP Pence has just announced the plan for our astronauts to return to the surface of the Moon by the year 2024. And this time, we’re visiting new territory – the South Pole! Follow along as we continue our journey of space exploration.
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That's a big end effector! Behind us is the Dextre manipulator, which attaches to the massive Canadarm2 above us. Excited to begin two weeks of robotics training here @csa_asc
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The Western US looks even more beautiful and interesting after my initial @NASA geology training. A great day out flight training with @AstroDuke over @GrandCanyonNPS, Glen Canyon, and @ZionNPS.
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It boggles my mind that the @MarsRovers were originally designed to last 90 days. 15 years later, what an amazing accomplishment for the @NASAJPL team.
Humanity’s greatest explorers aren’t always human.
Join us as we celebrate the achievements of @MarsRovers Opportunity at the completion of a 15 year mission: go.nasa.gov/2Sw1ara #ThanksOppy
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Great question. g falls off with the square of distance, so for Everest, which is about 0.0014 Earth radii in height, the falloff will be 0.0028g, or about 0.027 m/s^2. That's similar in magnitude to the effect of Earth's rotation. Earth's equatorial bulge plays a similar role.
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0.0059 m/s^2: acceleration of Earth's center of mass due to Sun's gravity
0.0023 m/s^2: Coriolis acceleration due to ISS pitch rate of an astronaut translating at 1 m/s through @Space_Station
3.3e-05 m/s^2: acceleration of Earth's center of mass due to Moon's gravity
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9.81 m/s^2: acceleration of object in freefall at Earth's surface
8.68 m/s^2: accel of @Space_Station center of mass
1.63 m/s^2: accel of object in freefall at Moon's surface
0.034 m/s^2: centripetal accel at equator (makes you slightly lighter) due to Earth's rotation
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