Space
AstrobiologyNAI
NASA Astrobiology Institute: we study life in the Universe!916,076 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.872,394 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 Camp746,329 followers | Follow
Neil deGrasse Tyson
Astrophysicist, American Museum of Natural History. Author: Space Chronicle, The Pluto Files,. Host: StarTalk Radio http://StarTalkRadio.net487,114 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/ePb57v444,654 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.233,361 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.217,560 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.214,479 followers | Follow
CassiniSaturn
Cruising around Saturn, its moons and the magnificent rings193,735 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.152,613 followers | Follow
NASA Astronauts
Hear from all NASA's astronauts on Twitter, plus updates on astronaut activities here.135,644 followers | Follow
Douglas H. Wheelock
Test Pilot; NASA Astronaut: STS-120 & ISS-25; Space Station Commander; Living a life of faith inspired by quiet moments...107,149 followers | Follow
Curiosity Rover
NASA's next mission to Mars. I'm currently en route to the Red Planet. Arrival anticipated Aug. 5, 2012.101,049 followers | Follow
Nicole Stott
NASA Astronaut, STS-133, STS-128, STS-129 & ISS Expeditions 20/21. NEEMO 9.94,052 followers | Follow
Mark Kelly
52,513 followers | Follow
NASA Goddard
Tweeting the best in NASA astronomy, Earth sciences and robotic exploration for the Goddard Space Flight Center.47,110 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.26,645 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!25,246 followers | Follow
Sandy Magnus
22,989 followers | Follow
Cady Coleman
22,279 followers | Follow
- NASA Wallops
22,267 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.19,842 followers | Follow
NewHorizons2015
The First Space Mission to Explore Planet Pluto and the Kuiper Belt19,293 followers | Follow
Jeff Williams
19,008 followers | Follow
NASA Watch
Covering NASA online since 1996. We're the source for NASA news.17,437 followers | Follow
Robert L. Satcher
Former NASA Astronaut. Comments and views expressed here are my own.15,851 followers | Follow
Space Center Fan
Dedicated fan of Kennedy Space Center, tweeting launch dates, tours, tickets & events in Florida, NASA, Space & more! Follows back15,013 followers | Follow
ESA Planck
A European Space Agency (ESA) spacecraft to understand the origin and evolution of our Universe14,185 followers | Follow
ESA Operations
From low Earth to deep space: keeping up with space operations at ESA - Europe's space agency.11,888 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.10,551 followers | Follow
U.S. HSF Committee
The Committee will conduct an independent review of ongoing U.S. human space flight plans and programs, as well as alternatives.9,501 followers | Follow
Houston Control
A Capsule Communicator is a person who communicates with the space crew. Usually located within Mission Control and usually another astronaut7,680 followers | Follow
Dr. Bernard Harris
Physician. Astronaut. Entreprenuer. Author. Founder, The Harris Foundation. Managing Partner, Vesalius Ventures.6,342 followers | Follow
Apollo 11 Eagle
The lunar module was named Eagle after the bald eagle depicted on the insignia; the bald eagle is the national bird of the United States6,250 followers | Follow
Year of Astronomy UK
Keep up to date with everything that's happening in the UK during the International Year of Astronomy 20095,590 followers | Follow
Scott Maxwell
On a small red light in the night sky lives four hundred pounds of thinking metal sent from Earth. I tell that metal what to do, and it does it.5,111 followers | Follow
Dr. Bruce Betts
A planetary scientist giving you fun random space facts and easy astronomy in a short attention span format.4,338 followers | Follow
Chris B - NSF
NASASpaceFlight Managing Editor. Shuttle Hugger/NASA Pimper. Insists orbiters are called *she* not *it*. York City FC PROMOTED!! Best animal: Horses, FACT.4,179 followers | Follow
Story Musgrave
thinker, astronaut, poet, landscape architect, doctor, speaker, marine, artist, professor, innovator3,855 followers | Follow
Irene Klotz
Journalist specializing in NASA, space science, commercial space. Media consultant.3,594 followers | Follow
ApolloPlus40
Nature News twitters the Apollo 11 moon mission as it happened -- 40 years on2,554 followers | Follow
Andy Scheer
Former space shuttle technician now helping retire the program to make way for the future! My tweets are my own and do not reflect those of my employer or NASA.2,269 followers | Follow
Marc Boucher
CEO at @SpaceRef a new media company focused on the space sector. Entrepreneur, technologist, publisher of @SpaceQuarterly magazine & online since '91.2,059 followers | Follow
spasmunkey
NASA physiologist, shuttle hugger, space geek. I love airplanes, science and Star Wars movies. Outdoorsy gal. My tweets are my own.1,976 followers | Follow
Bickering Planets
1,135 followers | Follow
Charles F. Radley
http://facebook.com/charles.radley - Associate Fellow American Institute of Aeronautics and Astronautics544 followers | Follow
