Deepspace2311
Kevin Spacey
Former shoe salesman now making a go at film and theater. Wish me luck... | @TriggerStreet @TriggLA2,339,789 followers | Follow
AstrobiologyNAI
NASA Astrobiology Institute: we study life in the Universe!916,028 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.874,247 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 Camp746,760 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.218,564 followers | Follow
CassiniSaturn
Cruising around Saturn, its moons and the magnificent rings194,267 followers | Follow
NASA Astronauts
Hear from all NASA's astronauts on Twitter, plus updates on astronaut activities here.136,107 followers | Follow
Curiosity Rover
NASA's next mission to Mars. I'm currently en route to the Red Planet. Arrival anticipated Aug. 5, 2012.101,458 followers | Follow
Nicole Stott
NASA Astronaut STS-128, ISS Expeditions 20/21, STS-129, STS-133. Aquanaut NEEMO 9.94,301 followers | Follow
Rick Oliver
⋆≡☼≡⋆ Great interest in: Astronomy ♣ Time pieces ♥ Paranormal ♠ Travel ♦ Outdoors ♣ Cats ♥ Music ♠ Wine ♦ Stamps & Coins ♣ Having a Superior Time! ⋆≡☼≡⋆39,764 followers | Follow
Bob Richards
Space entrepreneur. Orphan of Apollo. A Founder of the International Space University, Singularity University, SEDS, Odyssey Moon & Moon Express (CEO).38,143 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.36,222 followers | Follow
Institute of Physics
Official twitter account for the Institute of Physics (IOP). Lena from the press office tweets physics news and research, IOP activities and events.29,180 followers | Follow
SmithsonianAirSpace
The Smithsonian National Air and Space Museum maintains the largest collection of historic air & space objects in the world.26,407 followers | Follow
Bill Nelson
U.S. Sen. Bill Nelson is the senior senator from the state of Florida.23,119 followers | Follow
Space Fellowship
An international news and information network dedicated to the space industry.22,165 followers | Follow
NewHorizons2015
The First Space Mission to Explore Planet Pluto and the Kuiper Belt19,426 followers | Follow
Google Lunar X PRIZE
The official Google Lunar X PRIZE Twitter account. Going back to the moon, and taking you with us.15,692 followers | Follow
Space Center Fan
Dedicated fan of Kennedy Space Center, tweeting launch dates, tours, tickets & events in Florida, NASA, Space & more! Follows back15,019 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.12,667 followers | Follow
AmericanIndianMuseum
The Smithsonian's National Museum of the American Indian is committed to advancing knowledge and understanding of the Native cultures of the Western Hemisphere.11,957 followers | Follow
Perlan Project
The Perlan Project is a research project to study atmospheric conditions utilizing sailplanes designed to fly at extremely high altitudes.11,315 followers | Follow
WI Astronomy
A Wisconsin based Space and Astronomy News public outreach website.11,095 followers | Follow
Am Geophysical Union
Official account of the American Geophysical Union, the world's largest organization of Earth and space scientists.10,277 followers | Follow
Spacevidcast
Making Space Commonplace! New media company looking to the stars.9,981 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.9,546 followers | Follow
Brian Krueger, PhD
Science news site and Blog Network masquerading as a social network for the sciences. Enjoy the news and our science rants.8,521 followers | Follow
WorldSciFest
The World Science Festival is a tribute to imagination, ingenuity, and inventiveness. The 2012 Festival is May 30th to June 3rd, in New York City. #WSF127,740 followers | Follow
AIP Publishing
Highly cited, highly respected, and highly relevant, AIP's archival journals are the cornerstone of many physics collections.7,245 followers | Follow
A Geek Mom (Shannon)
Self-employed web geek; Space Tweep; Space Camp (1987) & NASATweetup alumnus since Nov. 2009 (STS-129 KSC). My tweets are my own.6,633 followers | Follow
Deborah Berebichez
A physicist with a deep passion for communicating science to the masses. Secondary life as philosopher and actor. Made in Mexico.6,587 followers | Follow
Jen Scheer
Former Space Shuttle technician. Artist, photographer, inventor. Space Tweep Society founder, @FragileOasis contributor, and 2010 Shorty Award winner.6,570 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/Twanifesto6,447 followers | Follow
- Jeff Goldstein
-Astrophysicist, educator, writer, nat'l cntr director (http://ncesse.org), @Huffingtonpost blogger | Science education in a new light. Blog on the Universe5,927 followers | Follow
Daryn Kagan
Host of The Daryn Kagan Show:Great Music/Uplifting Stories! Author, Columnist. All about spreading inspiring news on as many platforms as possible.5,479 followers | Follow
lowflyingrocks
I mention every near earth object that passes within 0.2AU of Earth. @tomtaylor made me.4,962 followers | Follow
William Pomerantz
Vice President for Special Projects at Virgin Galactic. Former head of the $30 million Google Lunar X PRIZE. Opinions here are my own, not my employer's.4,807 followers | Follow
ATKRocketNews
Official news and updates for ATK’s Propulsion Systems including launches, ground tests and other milestones.4,520 followers | Follow
Astronomy Blog *☁⋆*
Looking upwards. Mostly from the UK. Views are mine (should go without saying). Government warning: may (or may not) contain jokes.4,294 followers | Follow
Gene J. Mikulka
Spaceflight Observer Producer & Editor, Talking Space Panelist, Amateur Astronomer, Grad Student, House Rabbit Advocate. Opinions here are my own.3,937 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.3,882 followers | Follow
Story Musgrave
thinker, astronaut, poet, landscape architect, doctor, speaker, marine, artist, professor, innovator3,880 followers | Follow
Stuart Clark
Astronomer, journalist, author and speaker. Author of The Sun Kings and The Sky's Dark Labyrinth trilogy, the history of astronomy – dramatised!3,777 followers | Follow
Wayne Hale
Former Space Shuttle Program Manager & Flight Director for 40 missions. Now retired from NASA after 32 years. Currently consults for SAS & a full time grandpa.3,714 followers | Follow
Erika Vick
Experience NASA! Former Space Shuttle engineer. My opinions are my own and do not necessarily reflect those of my employer.3,506 followers | Follow
Colin Stuart
Freelance science communicator, writer & broadcaster. Freelance astronomer for Royal Observatory, Greenwich (views mine).3,412 followers | Follow
The Jodcast
An astronomy podcast from the University of Manchester's Jodrell Bank Observatory.3,019 followers | Follow
SETI Institute
Our mission is to explore, understand and explain the origin, nature and prevalence of life in the universe2,931 followers | Follow
Jorge Salazar
Science journalist and broadcaster - EarthSky, a clear voice for science2,745 followers | Follow
Scott Forman
Science Screen Report, an award winning classroom series (DVD/Streaming) designed to get kids interested in science. Provided free to schools.2,523 followers | Follow
Hilary Maybaum
Science writer and editor, non-practicing oceanographer, one-time Alvin diver, hiker, kayaker, crossword puzzler, candy eater2,518 followers | Follow
Sally Ride Science
Sally Ride Science™ is an innovative science education company dedicated to igniting students' interests in science, technology, engineering, and math.2,341 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.2,264 followers | Follow
Applied Physics Lab
The Johns Hopkins University Applied Physics Laboratory (APL) is a not-for-profit center for engineering, research, and development.2,233 followers | Follow
spasmunkey
NASA physiologist, shuttle hugger, space geek. I love airplanes, science and Star Wars movies. Outdoorsy gal. My tweets are my own.1,984 followers | Follow
santacruzweekly
Weekly Newspaper for Santa Cruz County; formerly Metro Santa Cruz.1,857 followers | Follow
Michael J. Laine
Think Big! There is a profound difference between 'difficult', 'very hard' and 'impossible'. We're building an Elevator to Space. Really. www.liftport.com1,769 followers | Follow
Ralf Schoofs
In my early days the lunar landings aroused my interest in space. Now I am an artist and illustrator! Have a look at my #spaceart designs!1,704 followers | Follow
Dr. Heather Good
Heather Good EdD is editor of http://FoundonMars.com Attendee of STS-134 Tweetup!!1,692 followers | Follow
Dennis D. McDonald
Strategy, collaboration, project planning, project management. Plus occasional book and movie reviews.1,689 followers | Follow
Joel Raupe
Principal Investigator, Lunar Pioneer Research Group; Promoting extended human activity on Earth's Moon1,686 followers | Follow
Space Elevator
From concept to reality. News and information for the Space Elevator advocate, professional and enthusiasts. A service of @SpaceRef.1,682 followers | Follow
TheSpacewriter
Science writer & voice-over artist, specializing in astronomy/space science; write/narrate articles, documentaries and Webcasts. I also have political views!1,662 followers | Follow
Patrick M.
There is simply nothing better than looking into deep space to soothe the mind and put things into perspective. IT & Content Geek. Spaceflight. Tech Rocks!1,652 followers | Follow
Ron Atkins
New Space Is A Place. And We're Going There! All the latest on SpaceX, Virgin Galactic, Bigelow Aerospace, XCOR, Blue Origin, et cetera. Go Yankees!1,646 followers | Follow
The Mars Society
The Earth is the cradle of humanity, but mankind cannot stay in the cradle forever. On To Mars!1,432 followers | Follow
Deirdre Kelleghan
Am an amateur astronomer, I paint and enjoy writing. Informal Educational Outreach for children http://www.deirdrekelleghan.net/blog.html1,388 followers | Follow
mrdoornbos
Founder of evadot.com and spaceupdc.org- there's a good chance I'll be voiding a warranty today1,367 followers | Follow
DouglasMallette
CEO @ Cybernated Farm Systems (CFS); Author: Turning Point; Public Speaker for Science, Technology, Engineering & Humanity; Systems Engineer; Husband & Father1,362 followers | Follow
Dark Sky Festival
9th Annual Dark Sky Festival at Harmony. April 14, 2012 Be Part of the Solution, Fight Light Pollution!1,345 followers | Follow
Project Galileo
On-line telescope for schools across the UK For more info, visit: http://projectgalileo.org.uk Squidoo Lens: http://is.gd/nTQP1,344 followers | Follow
Rebecca Setzer
A star loving bird watching nature enthusiast with a knack for the knotting. I guess that makes me an AstroBirdKnitologist1,308 followers | Follow
NewSpace News
Follow @SpaceFrontier's @NewSpaceNews to stay informed about developments in entrepreneurial space. Editor: @JVTumber | Sponsored by @SpaceIsle1,305 followers | Follow
Stephen Braham
Quantum Cosmologist turned Arctic-going IT-exploring Rocket Scientist1,296 followers | Follow
Tiptheplanet
A Green wiki that everyone should edit. Also see @brightgreen Like us on Facebook - http://www.facebook.com/pages/Tip-The-Planet/1218618678364531,270 followers | Follow
Mark Zaugg
SysAdmin (Windows, Mac, Linux), Space Cadet, Curler, Roadie, F1 Snob, Politico, Geocacher, Professional Babbler, The (Almost) Perfect Dad, Dweeboid at large.1,267 followers | Follow
Science House
Science House is an outreach organization dedicated to promoting science throughout the world through seed-stage investments and a private foundation.1,212 followers | Follow
SciencePassion
Follow your Science Passion Here! We will be feeding all Science News, Updates and Tips. We hope to help you pursue and follow your Passion1,212 followers | Follow
Roger Weiss
NASA/JSC ISS Research; Certified NASA Nerd, Space Geek, Family Man, Beatles Freak, Celtic Music Fan; maybe also a bit o' a poet, but don't really know it.1,208 followers | Follow
Wynyard Planetarium
Astronomy based education and entertainment resources of Stockton-on-Tees Borough Council; supported by CaDAS & DAS. Tweets by Ed Restall (Director)1,189 followers | Follow
leia in la la land
Former advertising director/copywriter turned OCD news junkie.1,139 followers | Follow
The Cosmos Review
space & poetry quotes - literary magazine celebrating and commemorating humankind’s relationship with the cosmos through poetry. Space Frontier Foundation1,118 followers | Follow
Richie Jarvis
UK Astronomer, Astrophotographer, and presenter of Under British Skies on http://astronomy.fm each month...1,116 followers | Follow
Ewan Bryce
Astro junkie, weekday road warrior, quasi malt head, gamer & temporal trekker. Laying down a rubber road to freedom two wheels at a time.1,078 followers | Follow
Bellatrix Orionis
Mad amateur astronomer interested in debating life the Universe and whether you'd get a decent cup of tea on a space journey1,018 followers | Follow
Dr Adriana Caselotti
Particle Physicist & Space Enthusiast. Amateur astronomer.998 followers | Follow
Karin Fornazier
PhD student (particle physics, LHCb, charm physics), ballet addicted. Interested in astrobiology, history and philosophy of science964 followers | Follow
Michael Salotti
Virginia State Parks, astronomy, geology, and anything dealing with nature. NASA STS-133 Tweetup917 followers | Follow
Mark Ratterman
FAA Electronics Tech, space exploration fan+married to 1 Talking Space Podcast with News, Interviews, Space Flight/Exploration... Look for me on Google +879 followers | Follow
Spacearium
I'm work as a journalist covering the space program and NASA and Exec. Dir. at an R&D company working on next generation space power and propulsion technology.872 followers | Follow
Julio Vannini
President of the Amateur Astronomers Society of Nicaragua (ANASA), Space Tweep, SEDA/LIADA NC, AWB NC, Trek fan and Free Software Promoter using OpenSuSE.865 followers | Follow
Sarah Murray
A chemist in Manchester,UK with many likes, including chatting to and reading about what other scientists are up to.Award winning STEM Ambassador 4 Manchester.856 followers | Follow
Patricia Phillips
Space & science writer, poet, SpaceTweep,ex-NASA PIO, Native American storyteller. Rheumatoid arthritis warrior, wishes she could dance again.829 followers | Follow
Charissa S.
*Burgh Verified* planetarium elf/laserist, #STS129 & @NASAGlenn #nasatweetup alum. Pittsburgh to the core. I JUST REALLY LOVE HOCKEY AND SPACE, GUYS.824 followers | Follow
David Evans
I have discovered 19 sungrazing comets with the SOHO Space Telescope. Main interest: h-alpha solar photography.762 followers | Follow
Jeff Burton
An observational astronomer forced to make a living as a system architect.543 followers | Follow
Jan DuRaine
Life is what you make it. Don't stop living till they close the lid.538 followers | Follow
Galaxy Wire
GALAXY WIRE brings the universe to your desktop, with live space news, videos, and photos from across the internet.360 followers | Follow
Jeffrey Brown
Dad, disabled Navy veteran, Debian Linux systems/network wizard, philosopher, chess player, environmentalist.315 followers | Follow
Charles Bell
IAU MPC Observatory code H47 Vicksburg; Comet and Minor Planet Astrometry, Observation and Study301 followers | Follow
Nick Evetts
My Interests are Amateur Radio, Astronomy, Cooking,HomeBrewing,Gardening,Scouting,Sea Fishing & the Weather.253 followers | Follow
Nicola Sarzi-Amade
Vice President of Scorpius Space Launch Company and Systems Engineer at Microcosm. PhD in Astronautics.150 followers | Follow
Thomas Kennedy
MBA,economist,classical pianist,consultant, enjoy fine wine/dining,astronomy,pro basketball,running,auto racing,writing. Also http://Twitter.com/TheBearEconomy138 followers | Follow
Scott Reed
Hi I'm Scotty I'm in a wheel chair ,Its aways My dream i can talk NASA or with others NASA crews someday now with twitter i can do that125 followers | Follow
Lithium Cyanide
Astrophysicist in training, vegan, guitarist, REM fan, podcaster, probably slightly deranged. Live with @ratsarenice106 followers | Follow
