Outer Space
Asteroid Watch
JPL's Near Earth Object Office coordinates NASA's efforts to detect, track & characterize potentially hazardous asteroids & comets that could approach Earth.872,210 followers | Follow
Astro Pic Of The Day
Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.407,802 followers | Follow
The SETI Institute
We believe we are conducting the most profound search in human history — to know our beginnings and our place among the stars.217,410 followers | Follow
NASA Kepler
The Kepler Mission is designed to survey our region of the Milky Way galaxy to discover Earth-size planets in the habitable zone.214,374 followers | Follow
CassiniSaturn
Cruising around Saturn, its moons and the magnificent rings193,615 followers | Follow
Spirit and Oppy
Roaming the Red Planet on six wheels since Jan 2004. The official mission Twitter of the Spirit and Opportunity rovers.152,568 followers | Follow
NASA Astronauts
Hear from all NASA's astronauts on Twitter, plus updates on astronaut activities here.135,583 followers | Follow
Curiosity Rover
NASA's next mission to Mars. I'm currently en route to the Red Planet. Arrival anticipated Aug. 5, 2012.100,965 followers | Follow
Johnson Space Center
NASA's JSC is the lead center for the International Space Station and the Orion spacecraft, and the home of the Mission Control Center and NASA astronaut corps.65,173 followers | Follow
NASA Technology
The official Twitter account for NASA's Office of the Chief Technologist41,996 followers | Follow
NASA Social
Follow us for announcements on social media @NASA and for info about upcoming NASA Socials38,749 followers | Follow
NASA Webb Telescope
NASA's James Webb Space Telescope will give us an amazing look at the universe! The project is working to a 2018 launch date.26,598 followers | Follow
LCROSS_NASA
NASA mission to explore the Moon to look for water ice at the poles! And I found it! My mission (and my tweets) ended Oct 9, 2009. But, I'm forever on the moon!25,239 followers | Follow
NASA Images
Largest collection of NASA related media from a single, searchable site.21,047 followers | Follow
Chandra Observatory
Chandra's ongoing mission is to study the X-ray Universe, including black holes, new stars, and clusters of galaxies. Operated for NASA by SAO18,982 followers | Follow
NASA Watch
Covering NASA online since 1996. We're the source for NASA news.17,389 followers | Follow
NASA Blueshift
Blueshift: Bringing the Universe down to Earth with podcasts, blogs, and more!13,315 followers | Follow
NASA Voyager
The official account for NASA’s twin Voyager 1 & 2 spacecraft, the longest currently-operating spacecraft in deep space.10,033 followers | Follow
UARS Reentry
Tracking the orbital decay of UARS. Providing information on getting a visual on its atmospheric reentry. | note: This is not a NASA official account |8,502 followers | Follow
chad myers
Severe Weather Expert and Science reporter for CNN. I try to make complex science a little more understandable. Promoting cool science 1 tweet at a time.5,347 followers | Follow
Moon Express, Inc.
MoonEx is a privately funded lunar transportation and data services company establishing new avenues for commercial space activities beyond Earth orbit.3,619 followers | Follow
Spaceflight101
Space News, Up-To-The-Second Mission Coverage and More - You can feel free to ask any question, just @ reply.2,975 followers | Follow
Space & Astronomy
Space Projects, Planets, Solar System, Universe, Space Travel, Spacecraft, Rockets, Astronomy.2,362 followers | Follow
Our Solar System
A nice place about 28,000 light years from the center of the Milky Way galaxy in the Orion spiral arm.2,119 followers | Follow
ROSAT Reentry
Tracking the orbital decay of ROSAT. Providing & collating information on getting a visual of its atmospheric re-entry.1,969 followers | Follow
Bill Cooke
1,855 followers | Follow
SPACETRAiLS
#Headlines from orbit! #Spacetrails Worldwide collected space news brought together in one spot. When it happens we'll be the first to let you know.1,791 followers | Follow
AstronomyCalgary
Calgary's top astronomy organizations (TELUS Spark, RASC, RAO) collaborate on public astronomy events around the city. Join us on Facebook.com/AstronomyCalgary895 followers | Follow
Altair Lunar Lander
This is the official NASA Altair Lunar Lander twitter page. Learn how Altair's going to provide astronauts a base on the moon.827 followers | Follow
Orbital Horizon
Orbital Horizon provides Space Relations/Outreach, Suborbital Spaceflight bookings and related Space Development Solutions.687 followers | Follow
Mark Rigby
Brisbane Planetarium Curator. It is so satisfying to spark that sense of wonder about the Universe in others. And I love to travel and to talk to good friends.452 followers | Follow
Curated by Doug Braun
Interesting outer space accounts such as NASA, various interplanetory missions, related organizations, etc.
