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On flight day 19 for our @NASA_Orion spacecraft, four limiters responsible for downstream power switched off due to an issue with a power conditioning distribution unit.

The system is healthy, and there was no interruption to any critical systems: go.nasa.gov/3HaKBco
#NASAArtemis #Artemis



Part of an ancient river delta in Jezero Crater, Mars, as seen today by the @NASAPersevere rover. mars.nasa.gov/mars2020
#NASASolarSystem


The Sun as seen today in ultraviolet light by @NASASun's Solar Dynamics Observatory in Earth orbit. sdo.gsfc.nasa.gov/
#NASASolarSystem


The Pacific Ocean as seen today from @Space_Station eol.jsc.nasa.gov/ES
Learn about @NASAEarth's many missions to observe our home planet: nasa.gov/earth
#NASASolarSystem


We are all connected by water. As we get closer to launching SWOT, we’re focusing on #TrackingWorldWater and want to hear from you! 🌊

Share a photo, video, or questions about the mission and we might share it on the launch broadcast. Submit today ➡️ go.nasa.gov/3usJ368
#NASAEarth



Today we're celebrating retired NASA astronaut and @USCG commander, Bruce Melnick! Along with being the first Coast Guard Aviator to participate in NASA's space program on STS-41 and -49, he was also the first Coastie in space!
#NASAhistory


About 670 million light-years away in the constellation Eridanus, two galaxies are caught in a celestial embrace. The merging galaxies are distorted by gravity and twisted into a colossal ring, leaving their cores nestled side by side.
go.nasa.gov/3iFph4p
#NASAExoplanets
in reply to NASA

I wonder what it looks like today, 670 million years later?
We can only speculate...
in reply to NASA

The showstoppers in the foreground are brilliant but I just sat with this open staring at all that’s going on in the distance. Takes my breath away that we can see this.


Some massive star clusters shine bright for our Fermi telescope’s gamma-ray eyes due to the numerous fast-spinning pulsars they are likely to contain. This sky map highlights three of our galaxy’s largest globular clusters plus a few notable binary star systems. #StarrySights
#NASAUniverse


An observatory that will capture light from Earth’s outer atmosphere is set to launch in 2025 with a new name – The Carruthers Geocorona Observatory – in honor of Dr. George R. Carruthers, who designed & built the first lunar telescope, flown on Apollo 16. go.nasa.gov/3XRVMNb
#NASA
#NASA


Four astronauts took Monday off following a weekend of spacewalk activities. The rest of the Exp 68 crew worked on electronics, life support, and spacesuit maintenance. blogs.nasa.gov/spacestation/20…
#ISS
#iss


The nitrogen in your DNA was once inside a small star. 🧬 That star shed its outer layers at the end of its life, forming a planetary nebula and freeing its nitrogen to become part of our solar system. #MondayMotivation
#NASAUniverse



You can also track the #Artemis I mission in our "Eyes on the Solar System" real-time 3D simulation: eyes.nasa.gov/apps/solar-syste…

[Video embedded in original tweet]
#NASASolarSystem



The (Amino) Truth is Out There 👽

#OTD in 1970, Dr. Cyril Ponnamperuma at @NASAAmes and coauthors reported they had positively identified extraterrestrial amino acids in the Murchison meteorite. It was the 1st conclusive proof of chemical evolution beyond Earth. #AlienAminoAcids
#NASAhistory



We have retrieved signal with @NASA_Orion after an expected loss of signal when the spacecraft flew directly behind the Moon.

You can see Earth in the distance. That's us. #Artemis
nasa.gov/artemislive
#NASA



.@NASA_Orion is only 1,550 miles away from the Moon right now.

The spacecraft will fly about 79 miles above the lunar surface at 11:42am ET (16:42 UTC).
#NASA

#NASA


LIVE NOW: @NASA_Orion is harnessing the Moon’s gravity to accelerate back toward Earth.

The spacecraft is expected to fly about 79 miles above the lunar surface at 11:42am ET (1642 UTC). #Artemis twitter.com/i/broadcasts/1yoKM…

[Video embedded in original tweet]
#NASA



.@NASA_Orion is closing in on the Moon, about 5,058 miles above the lunar surface. Orion is traveling at a velocity of 3,933 miles per hour. #Artemis
#NASAArtemis #Artemis
in reply to NASA

I really wish you would specify a reference frame when you give these speeds.


Let’s go supergiant spotting!

This new #StarrySights image shows NGC 2002, an open star cluster 30 light-years across.

At its center, you can spy red supergiants – massive stars that are fusing helium after exhausting their hydrogen fuel: go.nasa.gov/3isScZs
#Hubble



Pleiades: The Seven Sisters Star Cluster apod.nasa.gov/apod/ap221205.ht… #APOD
#APOD



Pleiades: The Seven Sisters Star Cluster

Image Credit & Copyright: Blake Estes (iTelescope Siding Spring Obs.) & Christian Sasse

apod.nasa.gov/apod/ap221205.ht… #APOD

#APOD
in reply to (moving) APOD

The Japanese word for the Pleiades star cluster is Subaru and their logo is a stylized rendition of same. The more you know. ☄️
in reply to (moving) APOD

I am always amazed at space photos that show how MANY stars there are, besides the ones that we can see in a really dark night sky.


Feeling starstruck? 🤩

This Hubble image shows a young star cluster named NGC 2040.

The stars seen here are very loosely clustered, share a common origin, and are drifting together through space! Discover more: go.nasa.gov/3H5xyZB
#Hubble



#ICYMI: @NASA_Astronauts Josh Cassada and Frank Rubio installed a new roll-out solar array on the station and watched as it unfurled (seen here in time-lapse) during a spacewalk on Saturday, Dec. 3, 2022. More... go.nasa.gov/3VvYuGm
#ISS


Venus's surface is shrouded in mystery thanks to its ultra-thick atmosphere, but when the Pioneer Venus Orbiter reached orbit 44 years ago on Dec. 4, 1978, it sent back detailed data about the planet…for another 14 years!

More about the mission: go.nasa.gov/3H4FI4A
#NASAhistory



Gemini VII astronauts Jim Lovell and Frank Borman launched to Earth orbit #OTD in 1965 for a 14-day endurance mission to see how humans could handle extended periods in space and perform a rendezvous with another craft.

More about the Gemini VII mission: go.nasa.gov/3Fm6GmY
#NASAhistory

in reply to NASA

I had not seen this specific spacesuit before. More streamlined than the later Apollo era suits.


We’re planning one of our biggest feats ever – bringing Mars samples to Earth – and you can play a part.

We're looking for your feedback on Mars Sample Return in a series of in-person meetings. Find details and updated meeting locations here: go.nasa.gov/3gniufj
#NASA

#NASA
in reply to NASA

Bring lots of ziploc bags. You might want to double bag the pointy ones. 😐
in reply to NASA

Link doesn't go anywhere (yet?)
Do us all a favor and please do not hire Musk to bring back Mars sample returns.


youtube.com/watch?v=0fKBhvDjuy…

Video: Powers of Ten

Video Credit & Copyright: Charles & Ray Eames (Eames Office)

apod.nasa.gov/apod/ap221204.ht… #APOD

#APOD
in reply to (moving) APOD

I remember watching this at the Durban Astronomical Society meeting in the 1990s.
in reply to (moving) APOD

Don't remember seeing this before (even if I am the correct age), I really enjoyed this video #learning @APoD:


There’s nothing like a weekend road trip – and you can follow @NASA_Orion’s journey as it heads back to Earth! We’ve listed all the ways you can keep up-to-date with the #Artemis I mission, including the live tracker, in this @Tumblr post: bit.ly/3VAlAeF
#NASA


As we prepare for future #Artemis missions, our astronauts aboard the @Space_Station are performing experiments that will lay the foundation of long-duration space travel.

Learn about the challenges and solutions our astronauts could help to address: go.nasa.gov/3Urehou
#NASAArtemis #Artemis

in reply to NASA

How will the lack of nature, specifically trees and their pheromones impact people over long term absence from them?
in reply to NASA

how’s that UAP investigation going? Is Bill Nelson shitting a chicken over it yet? Because that would be telling.


.@NASA_Astronauts Josh Cassada and Frank Rubio ended their spacewalk at 2:21pm ET today after successfully installing a new roll-out solar array on the station. blogs.nasa.gov/spacestation/20…
#ISS
#iss


The third and newest roll-out solar array (iROSA 3A) has been installed and unfurled on the station's Starboard truss segment and is generating power. A fourth roll-out solar array will be installed on another spacewalk planned for Dec. 19. nasa.gov/live
#ISS
#iss


A panoramic view of the Earth from @nasa spacewalker Josh Cassada's helmet cam as the space station orbited over Spain's northwest coast earlier today. nasa.gov/live
#ISS
#iss @NASA


The roll-out solar array successfully unfurled to its full length of 60 feet after its installation today on the station's Starboard-4 truss segment. nasa.gov/live
#ISS
#iss
in reply to NASA

Marvel Movies: “I built a best friend robot to help me toss together this quantum invincible suit last night that becomes 100 times its size and covers me when I touch my watch”
Actual Life: “y’all, we’re STOKED, the panel opened and none of the myriad possible terrible things occurred”


The roll-out solar array has been installed on its mounting bracket on the Starboard-4 truss segment and will soon be mated to cables and deployed. nasa.gov/live
#ISS
#iss
in reply to NASA

I like how the solar cell array sparkles with purple rectangles


#StarrySights & starry sounds!

This is a data sonification of the star cluster Caldwell 73. Scientists assigned sounds to different aspects of the image for a new way of experiencing the information in it!

Listen to more sonifications: go.nasa.gov/3Vs7IUa
#Hubble



Astronauts Corps, then Peace Corps

#OTD in 1969, President Nixon announced that Neil Armstrong would serve as Chairman of the Presidential Advisory Committee for the @PeaceCorps, a role Armstrong would serve from 1971–1973.

A video on Armstrong's life: go.nasa.gov/3umHlDi
#NASAhistory



.@nasa spacewalker Josh Cassada has released the roll-out solar array from its attachment point and rides the #Canadarm2 robotic arm to its installation site. nasa.gov/live
#ISS


.@nasa spacewalker Josh Cassada is releasing the bolts on the roll-out solar array to remove it from its attachment point before installing it on the station. nasa.gov/live
#ISS
#iss @NASA
in reply to NASA

it’s amazing to see that in space, just as down here in the gravity well, there is that little jerk, right at the end, when fastening a bolt. Power tools are the same all over the place.


Two @NASA_Astronauts set their spacesuits to battery power at 7:16am ET today beginning a spacewalk to install a roll-out solar array on the station. blogs.nasa.gov/spacestation/20…
#ISS
#iss

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