Space
Neil deGrasse Tyson
Astrophysicist, American Museum of Natural History. Author: Space Chronicle, The Pluto Files,. Host: StarTalk Radio http://StarTalkRadio.net495,799 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.416,643 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.219,306 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.215,533 followers | Follow
CassiniSaturn
Cruising around Saturn, its moons and the magnificent rings194,767 followers | Follow
NASA Astronauts
Hear from all NASA's astronauts on Twitter, plus updates on astronaut activities here.136,372 followers | Follow
Nicole Stott
NASA Astronaut STS-128, ISS Expeditions 20/21, STS-129, STS-133. Aquanaut NEEMO 9.94,495 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.66,398 followers | Follow
Naoko Yamazaki
Mission Specialist Astronaut on STS-131. Retired from JAXA in Aug'11. Dreams for space will continue...☆ (Not a NASA/JAXA official site. JAXA公式サイトではありません。)65,421 followers | Follow
Mark Kelly
52,644 followers | Follow
NASA Social
Follow us for announcements on social media @NASA and for info about upcoming NASA Socials39,162 followers | Follow
Virtual Astronomer
The Basil Fawlty of Astronomy, Science, Nature and more. Making Stargazing fun and accessible to all. Not your typical astronomer. Loves cycling & baking too.36,184 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!25,394 followers | Follow
Cady Coleman
22,581 followers | Follow
Space Fellowship
An international news and information network dedicated to the space industry.22,167 followers | Follow
NewHorizons2015
The First Space Mission to Explore Planet Pluto and the Kuiper Belt19,547 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 SAO19,217 followers | Follow
Robert L. Satcher
Former NASA Astronaut. Comments and views expressed here are my own.15,900 followers | Follow
Emily Lakdawalla
I'm the Planetary Society blogger, once a planetary geologist, now a writer and mom, writing about great space images and mission news.15,015 followers | Follow
Spacevidcast
Making Space Commonplace! New media company looking to the stars.10,021 followers | Follow
Carolyn Porco
Planetary scientist, leader of the Cassini imaging team, director of CICLOPS, & author-to-be. Opinions are my own.9,187 followers | Follow
Dan Burbank
8,331 followers | Follow
Solar Stormwatch
We're building a prediction of Earth-bound solar storms, using classifications made by Solar Stormwatch members.7,539 followers | Follow
Dr. Robert L.Satcher
Former NASA Astronaut. Comments and views expressed here are my own.7,319 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 team6,526 followers | Follow
mastenspace
Who are we? We build and fly reusable launch vehicles. It's an awesome job and amazing technology. Follow us for awesome videos and news. We fly.1,648 followers | Follow
LunarLanderChallenge
Northrop Grumman Lunar Lander Challenge, presented by X PRIZE, and prize money from NASA812 followers | Follow
