Space
AstrobiologyNAI
NASA Astrobiology Institute: we study life in the Universe!916,085 followers | Follow
Asteroid Watch
JPL's Near Earth Object Office coordinates NASA's efforts to detect, track & characterize potentially hazardous asteroids & comets that could approach Earth.873,412 followers | Follow
Buzz Aldrin
Astronaut, Apollo XI and Gemini 12; Doctorate from MIT in astronautics, Korean War veteran (fighter pilot of 66 missions). photo by Don Camp746,527 followers | Follow
Soichi Noguchi 野口 聡一
Long duration space flight on ISS! http://goo.gl/qmmf7 http://bit.ly/3ZMbEb http://bit.ly/bXNO6I http://bit.ly/bGfUrB http://linkd.in/ePb57v445,189 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.410,470 followers | Follow
Jose Hernandez
Retired NASA Astronaut and native of Stockton. Running for U.S. Congress in California's 10th District. Devoted husband, loving father, and a proud Democrat.233,571 followers | Follow
Jodrell Bank
Home of the world's third-largest steerable radio telescope, and the MERLIN National Facility. Part of the University of Manchester.227,227 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.217,993 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.214,718 followers | Follow
CassiniSaturn
Cruising around Saturn, its moons and the magnificent rings193,975 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.152,684 followers | Follow
NASA Astronauts
Hear from all NASA's astronauts on Twitter, plus updates on astronaut activities here.135,783 followers | Follow
Curiosity Rover
NASA's next mission to Mars. I'm currently en route to the Red Planet. Arrival anticipated Aug. 5, 2012.101,182 followers | Follow
Nicole Stott
NASA Astronaut STS-128, ISS Expeditions 20/21, STS-129, STS-133. Aquanaut NEEMO 9.94,136 followers | Follow
Mark Kelly
52,561 followers | Follow
Scott Kelly
31,488 followers | Follow
Esther Dyson
Internet court jEsther -- I occupy Esther Dyson. www.flickr.com/photos/edyson29,289 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.26,715 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!25,275 followers | Follow
Bill Nelson
U.S. Sen. Bill Nelson is the senior senator from the state of Florida.23,078 followers | Follow
Sandy Magnus
23,033 followers | Follow
NASA Marshall News
News about NASA's Marshall Space Flight Center - Space Shuttle, Rockets, Science, Engineering, & Space Station Science.22,634 followers | Follow
Cady Coleman
22,309 followers | Follow
Space Fellowship
An international news and information network dedicated to the space industry.22,170 followers | Follow
NASA Images
Largest collection of NASA related media from a single, searchable site.21,126 followers | Follow
Col. Tim Kopra
U.S. Army Astronaut, International Space Station Expedition 20 (STS-127). Ask me what it’s like to be Army Strong from the Space Station at goarmy.com/space.19,890 followers | Follow
NewHorizons2015
The First Space Mission to Explore Planet Pluto and the Kuiper Belt19,359 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 SAO19,053 followers | Follow
Jeff Williams
19,016 followers | Follow
NASA Watch
Covering NASA online since 1996. We're the source for NASA news.17,496 followers | Follow
Robert L. Satcher
Former NASA Astronaut. Comments and views expressed here are my own.15,858 followers | Follow
NASA's Juno Mission
Trekking to Jupiter to improve our understanding of the planet’s origins and the formation of planetary systems everywhere. Also at www.nasa.gov/juno15,023 followers | Follow
Space Center Fan
Dedicated fan of Kennedy Space Center, tweeting launch dates, tours, tickets & events in Florida, NASA, Space & more! Follows back15,009 followers | Follow
Astronomy Magazine
Astronomy informs, entertains, and inspires people who are interested in the science and hobby of astronomy.14,508 followers | Follow
ESA Planck
A European Space Agency (ESA) spacecraft to understand the origin and evolution of our Universe14,220 followers | Follow
NASA Blueshift
Blueshift: Bringing the Universe down to Earth with podcasts, blogs, and more!13,373 followers | Follow
Sky and Telescope
The Essential Magazine of Astronomy. Sky and Telescope is the world's leading compendium of information about the science and hobby of astronomy.12,617 followers | Follow
UK Space Agency
The official Twitter account of the UK Space Agency. The Agency is at the heart of UK efforts to explore and benefit from space.12,115 followers | Follow
ESA Operations
From low Earth to deep space: keeping up with space operations at ESA - Europe's space agency.11,968 followers | Follow
ESA Herschel
A European Space Agency (ESA) mission. Both the most sensitive far-infrared telescope ever put into space &, at 3.5m, the largest space telescope of any kind.10,576 followers | Follow
Spacevidcast
Making Space Commonplace! New media company looking to the stars.9,950 followers | Follow
Richard Garriott
Computer Gaming Pioneer and Private Astronaut (1st 2nd Generation)7,856 followers | Follow
Spitzer Telescope
Capturing the infrared spectrum since 2003. For the official feed follow @NASAspitzer.7,741 followers | Follow
WISE mission — NASA
NASA's Wide-field Infrared Survey Explorer: Mapping the Sky in Infrared Light. Keywords: NASA WISE spacecraft wide field infrared survey explorer7,683 followers | Follow
Hubble Daily Image
Get a picture of the day from the Hubble Space Telescope, NASA's famed orbiting observatory.6,622 followers | Follow
NASA's Dawn Mission
The first true spaceship with two ports of call, the most massive objects in the asteroid belt: Vesta and Ceres. Tweets from Dawn's outreach & media team6,459 followers | Follow
Exoplanetology.com
The Art and Science of New Worlds. Explores the impact of Exoplanet discoveries on Humanity's Culture and Future. http://bit.ly/Twanifesto6,438 followers | Follow
Infrared observatory
NASA's Spitzer Space Telescope - the infrared Great Observatory. Observes asteroids, comets, extrasolar planets, stars, galaxies and more...6,150 followers | Follow
Planet Hunters
With your help, we are looking for planets around other stars. We're using data from NASA's Kepler mission.4,104 followers | Follow
AstroSpaceNow.com
We obsessively track breaking news and interesting content about astronomy and space exploration over the blogosphere and Twitter so you don't have to.3,876 followers | Follow
Story Musgrave
thinker, astronaut, poet, landscape architect, doctor, speaker, marine, artist, professor, innovator3,855 followers | Follow
PhysOrg Space News
PhysOrg.com: Space, Earth, Environment, Astronomy News Stories3,246 followers | Follow
NASA's MAVEN Mission
MAVEN, set to launch in 2013, will explore Mars' upper atmosphere, ionosphere & interactions with the sun & solar wind. http://lasp.colorado.edu/maven2,960 followers | Follow
Will Gater
Astronomer, science writer & space geek. Author of The Cosmic Keyhole, The Night Sky Month by Month & co-author of The Practical Astronomer.2,719 followers | Follow
SpaceOps 2010
Highly anticipated conference bringing together global space operations professionals1,863 followers | Follow
VMC - Mars Webcam
The Visual Monitoring Camera (VMC) is mounted on Mars Express, ESA's deep-space probe now orbiting the Red Planet.1,517 followers | Follow
Astrophysics Papers
New Astrophysics submissions to arxiv.org (not affiliated with arxiv.org)714 followers | Follow
We Are Astronomers
We are Astronomers is an exciting new 360° Fulldome digital planetarium show launching 23 May 2009 across the UK.649 followers | Follow
Megan Donahue
I'm an astronomy professor at Michigan State University. I run. I play bass guitar and classical piano. I have 3 beautiful children!567 followers | Follow
SISSA Astrophysics
The astrophysics group of the International School for Advanced Studies (SISSA) in Trieste196 followers | Follow
Ken Reightler
148 followers | Follow
