ESA Rosetta Mission ‏@ESA_Rosetta 9m9 minutes ago

A new week in #space begins 232million km from Earth, 322million km from the Sun, ~81km from #67P. #LivingWithAComet pic.twitter.com/4auRB7HTqv

Douglas H. Wheelock ‏@Astro_Wheels 9h9 hours ago

Poignant words of hope from friend, Piers Sellers. Life, love, and our fragile planet. http://www.nytimes.com/2016/01/17/opinion/sunday/cancer-and-climate-change.html?smid=tw-share&_r=1 … pic.twitter.com/pm8DUBKPlf

Scott Kelly ‏@StationCDRKelly 13h13 hours ago

#SpaceFlower out in the sun for the first time! #YearInSpace pic.twitter.com/Cghu9XGv1J

NASA JPL ‏@NASAJPL 16h16 hours ago

It's launch day! Watch #Jason3 live on http://www.nasa.gov/ntv . Launch set for 10:42am PT (1:42pm ET, 18:42 UTC) pic.twitter.com/PzCbboLolz

Tim Peake ‏@astro_timpeake 19h19 hours ago

In the airlock, waiting for the last molecules of air to escape into space before opening the hatch. #spacewalk pic.twitter.com/Bwmdm5Bl3b

SpaceX ‏@SpaceX Jan 16

Out at sea for tomorrow's launch and landing attempt pic.twitter.com/9LMsj6qryI

EarthSky ‏@earthskyscience Jan 16

Worth a retweet! Rare aurora near Earth’s North Pole. http://bit.ly/1Zr4ITk  Photo by Kevin Rawlings. pic.twitter.com/kqFiJO43HN

New Scientist ‏@newscientist 56m56 minutes ago

This year molecule-sized cars will race - and it will kickstart the nanobot revolution http://ow.ly/X7jJO  pic.twitter.com/2F4CB6jcLG

NASA ‏@NASA 11h11 hours ago

#Jason3 satellite in orbit to monitor sea level rise! Solar arrays deployed & power positive http://www.nesdis.noaa.gov/jason-3  pic.twitter.com/SUL22dTzqs

NASA HQ PHOTO ‏@nasahqphoto 13h13 hours ago

Launch of the @Spacex rocket w/#Jason3 @NASA @NOAA @CNES @NASAseaLevel https://flic.kr/s/aHsksJfs3Q  pic.twitter.com/c2LvyZtx07

NASA History Office ‏@NASAhistory 17h17 hours ago

#HappyBirthday to actor @jamesearljones, voice of @starwars Darth Vader pic.twitter.com/46nekvlBQx

SPACE.com ‏@SPACEdotcom 20h20 hours ago

These Spidery 'Veins' On Mars Are Just Plain Weird http://oak.ctx.ly/r/4747e  @NASA pic.twitter.com/y0JPGgBVi7

World and Science ‏@WorldAndScience Jan 16

Interesting fact - 98% of the 7 billion billion billion atoms in the human body are replaced every year! pic.twitter.com/nSU8iwgLdu

AsapSCIENCE ‏@AsapSCIENCE Jan 16

The lifespan of a tree. (via @ScienceDump) pic.twitter.com/USkyxkah3C

Astro Pic Of The Day ‏@apod 2h2 hours ago

Proxima Centauri: The Closest Star: http://apod.it/160118  (follow link for explanation) pic.twitter.com/aE9ANKrzl5

NASA Social ‏@NASASocial 14h14 hours ago

Weather is 100% go for a 1:42pm ET launch of #Jason3. Fog is not a constraint. Watch live: http://www.nasa.gov/nasatv  pic.twitter.com/NzYOLw2Ycx

NASA Earth ‏@NASAEarth 17h17 hours ago

#Jason3 is set to launch at 1:42pm ET (10:42am PT) to monitor sea level rise, aid in hurricane prediction. @NOAA pic.twitter.com/0tR0jVE4A7

Universe Today ‏@universetoday Jan 16

SpaceX Launching NASA Jason-3 Satellite Jan. 17; with Barge Rocket Landing - Watch Live http://www.universetoday.com/126834/spacex-launching-nasa-jason-3-ocean-surveillance-satellite-jan-17-barge-rocket-landing-watch-live/ … pic.twitter.com/dg2n4JOwPL

Spaceflight Now ‏@SpaceflightNow Jan 16

Photos of SpaceX’s Falcon 9 rocket poised on its hillside launch pad in California today: http://spaceflightnow.com/2016/01/16/photos-falcon-9-poised-on-hillside-launch-pad-in-california/ … pic.twitter.com/Qrj18yW0fS

ISS Research ‏@ISS_Research Jan 16

The new zinnia flowers are the first grown in the #Veggie facility and represent decades of plant research in space. pic.twitter.com/JlUG3icDRd