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LIVE: How does the @Space_Station serve as a testbed for deep space exploration to the Moon and Mars? In a #SpaceStation20th panel, experts discuss @ISS_Research and technologies that will help enable missions with @NASAArtemis astronauts. Watch: http://www.nasa.gov/live pic.twitter.com/U3wzvXFJcl

On Jan. 6, @NorthropGrumman's #Cygnus spacecraft named in memory of Kalpana Chawla — the 1st female astronaut of Indian descent — is leaving the @Space_Station & will conduct an extended mission in orbit. Watch with us starting at 9:45am ET! Details: https://go.nasa.gov/3n1pGL4 pic.twitter.com/WVXKeWdGRa

Want to know more about our solar system but don’t know where to start? We’ve got you covered. Here’s what you need to know about: Mars Ocean Worlds Near-Earth Objects And so much more : https://go.nasa.gov/3pCwNLT pic.twitter.com/nE4fceiEm5

The @Space_Station’s unique microgravity environment lets us do science that we cannot do on Earth. Here’s what we learned this year from @ISS_Research aboard our orbiting laboratory: https://go.nasa.gov/3hmMjbT pic.twitter.com/DiQNHN4Rwy

It's winter in the Northern Hemisphere on Earth, but we're not the only place with ice and snow! From the frozen polar craters of Mercury to methane frost on the mountains of Pluto, season's greetings from around the solar system: http://youtu.be/49-2VDRBRX4 pic.twitter.com/k11CPE8Ma7

A wrinkle in time and space. This mesmerizing image depicts magnetic fields in galaxy NGC 1068 as revealed by our @SOFIAtelescope. Gaze into the magnetic fingerprint of a galaxy: https://go.nasa.gov/3pr6N63 pic.twitter.com/w5E4NCZixY

We remember Dr. George Carruthers, who passed away Dec. 26. During his career at the U.S. Naval Research Laboratory, Dr. Carruthers invented the first Moon-based astronomy observatory, which was placed by Apollo 16 astronauts on the lunar surface: https://go.nasa.gov/3hlnq08 pic.twitter.com/7oo7ON5BpB

On Wed., Dec. 30 at 10:40am ET, Shannon Walker of @NASA_Astronauts & @Astro_Soichi of @JAXA_en will answer questions from pre-K & early elementary school students who are part of the @NOGGINKids community. Watch this live Earth-to-space call on NASA TV: https://go.nasa.gov/3aUoWFr pic.twitter.com/YwsEGBD0Fd

On a Mission Gravity Assist Curious Universe Houston, We Have A Podcast Enjoy one of our many podcasts: from engineering feats, to guided tours of the solar system, to the human stories behind the Apollo Moon landing. Listen and subscribe: http://www.nasa.gov/podcasts pic.twitter.com/6AzUYX2q6W

How did we get here? How do stars and planets come into being? What happens during a star's life, and what fate will its planets meet when it dies? Come along on this interactive interstellar journey through time: https://go.nasa.gov/3h2SvFS pic.twitter.com/Yi0OVA7k43

Be your own explorer at home — the universe is waiting. Subscribe to our weekly NASA newsletter and catch up on the latest updates in space, plus online activities and other content for kids, adults or the whole family. Sign up here: http://nasa.gov/subscribe pic.twitter.com/2SplNSGLJ0

Newborn stars, hidden behind thick dust, are revealed in this image of the Christmas Tree Cluster. Infant stars appear as pink and red specks toward the center and appear to have formed in regularly spaced intervals that resemble a snowflake's pattern: https://go.nasa.gov/3rxnC0M pic.twitter.com/i51mxqldfw

Our galaxy contains billions of stars, our Sun among them. If each of those stars has not just one planet, but, like ours, a whole system, then the number of exoplanets (planets beyond our solar system) is truly astronomical: into the trillions. https://go.nasa.gov/37thFdn pic.twitter.com/TswDFAFjvJ

Unwrapped a new device? Download the #NASA_App app to explore the universe & discover our home planet: http://www.nasa.gov/nasaapp pic.twitter.com/vnUzkeZNsw

A spectacular view of the "northern lights" as seen from the @Space_Station! This 2017 image shows the station's solar arrays in the foreground and entrancing reds and greens of the auroras, dancing above Earth. Enjoy more images like this: https://go.nasa.gov/2JjdSpM pic.twitter.com/Dv1bd6eFZB

The first time three humans spent #Christmas in space was over 50 years ago during Apollo 8. This year, current @Space_Station crew members will soar 250 miles above Earth in a much larger spacecraft. Here’s how they'll ring in the holiday season: https://go.nasa.gov/3mN4SHd pic.twitter.com/wN1wonLD3y

Have yourself a merry little GIFmas. Check out our holiday-themed GIFs on @GIPHY by searching "nasaholiday" and add some cheer to your social media game: http://giphy.com/nasa/astronauts-in-the-holiday-spirit … pic.twitter.com/y51Q0PsUDy