Space

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MarsPhoenix

I dig Mars!
175,226 followers |

Phil Plait

Astronomer, author, skeptic, father, punster.
164,351 followers |

Virtual Astronomer

Astronomy, Science, Nature and more, Creator of #Meteorwatch, writer for Universe Today and the BBC. Making Stargazing fun and accessible to all.
23,802 followers |

David Bradley

Science news, views, interviews and tech talk from Science Writer David Bradley based in Cambridge, England, UK.
15,002 followers |

Space Center Fan

Dedicated fan of Kennedy Space Center, tweeting launch dates, tours, tickets & events in Florida, NASA, Space & more! Follows back
14,811 followers |

elakdawalla

I'm the Planetary Society blogger, once a planetary geologist, now a writer and mom, writing about great space images and mission news.
12,989 followers |

Year of Astronomy

The Universe: yours to discover
10,837 followers |

Spacevidcast

Making Space Commonplace! New media company looking to the stars.
8,950 followers |

ESO

The European Southern Observatory (ESO) is the most productive observatory in the world. This official account is managed by @oanasandu
7,114 followers |

Exoplanetology.com

The Art and Science of New Worlds. Explores the impact of Exoplanet discoveries on Humanity's Culture and Future. http://bit.ly/Twanifesto
5,603 followers |

- Jeff Goldstein

-Astrophysicist, educator, writer, nat'l cntr director (http://ncesse.org), @Huffingtonpost blogger | Science education in a new light. Blog on the Universe
5,593 followers |

Lucy Rogers

Fellow Institution of Mechanical Engineers, Fellow Royal Astronomical Society, Author. Saving the world from space debris.
4,906 followers |

Daniel Fischer

All things astronomy and space (and then some) - in tiny bits and pieces but mostly with links to more ... :-)
4,381 followers |

Catherine

Astrophysicist, science communicator, over-thinker. Autoimmune illness girl, passionate advocate. Lover of beautiful things in all forms. Kiwi in US. Dogs rule.
4,340 followers |

HiRISE

High-Resolution Imaging Science Experiment on Mars Reconnaissance Orbiter (MRO). Taking beautiful 25 cm/px pics of Mars 24/7. Request your own images w/ HiWish!
3,846 followers |

Nicole

Astronomer. Educator. Maker of tiny comets. Finishing my Ph.D, and soon working on http://cosmoquest.org/
3,324 followers |

Colin Stuart

Freelance science communicator, writer & broadcaster. Freelance astronomer for Royal Observatory, Greenwich (views mine).
3,077 followers |

tavianne

Astronomy, Space, Night Sky, Photography, and a little politics
2,818 followers |

mactavish

Love: Astronomy, all aspects of physical geography, and finding ways to be happy.
2,665 followers |

Stacey

work @NASA (*this is not official NASA Twitter*); Space Geek & Political Junkie (R). Also mom of 2 juggling work and play day by day
2,525 followers |

Will Gater

Astronomer, science writer & space geek. Author of The Cosmic Keyhole, The Night Sky Month by Month & co-author of The Practical Astronomer.
2,450 followers |

mars_stu

Astronomy writer and Outreach Educator and frustrated martian! :-)
2,381 followers |

Jenny ★

ScienceWriter & Broadcaster StarWatcher MusicLover Harpist BookWorm BSLUser WooBasher Atheist! http://astronomy.fm/under-british-skies/
2,198 followers |

Professor Astronomy

Astronomy researcher at the University of Texas at Austin
2,127 followers |

Alice Sheppard

MSc Astrophysics mature student, Galaxy Zoo mod, co-founder of Cardiff and Hackney Skeptics in the Pub, citizen science maniac, and general dazed waffler
2,108 followers |

Susan Niebur

Women make up half the bodies in the solar system -- why not half the scientists?
1,942 followers |

Waddell Robey

Independent research writer/editor and exploration advocate, engineer,space-nut,amateur astronomer, old pilot, bold sailor, SCUBA lover.**CHESAPEAKE GUARDIAN**
1,929 followers |

ASkyFullofStars

Astronomy, Space, Night Sky
1,576 followers |

LunarMark

A Chemical Engineer and a Lunar Astronomer. I'm also a science educator and write about the history of science.
1,504 followers |

C.C. Petersen

Science writer & voice-over artist, specializing in astronomy/space science; write/narrate articles, documentaries and Webcasts. I also have political views!
1,480 followers |

Ryan L. Kobrick, PhD

Executive Director, Yuri’s Night @YurisNight & Postdoc @MITMVL. I'm a CDN/USA globetrotter & astronaut hopeful. Love 2 play hockey, sail & ski. Rock the planet!
1,418 followers |

Sarah Kendrew

postdoc astronomer
1,369 followers |

Evie Marom

Space Crazy, Aerospace Engineer, Rocket Propulsion, FIRE Button Presser, Green Energy Enthusiast, Science Geek, Atheist, Snowboarder, Silly, Funny, Awesome..
1,342 followers |

Paul Sutherland

Space and astronomy writer. The Sun Spaceman but freelance contributor to many papers. Author of Where Did Pluto Go? I run the Skymania News site.
1,307 followers |

Null Session

Astronomer. Scientist. Blogger. Photographer. Mac user. Atheist. Single. Skeptic. Futurist. Primate. Secret Agent. Sock Monkey.
1,139 followers |

Alun

Ancient Historian/Archaeologist currently at the Annals of Botany & somewhere I can't talk about. These views do not reflect any of my employers.
1,040 followers |

Jason Marshall

Author of The Math Dude's Quick and Dirty Guide to Algebra, host of The Math Dude's Quick and Dirty Tips podcast, and professional astrophysicist.
995 followers |

Ryan Anderson

I study Mars and shoot things with lasers. I also read and blog and write.
991 followers |

Andrew Jaffe

Astrophysics, cosmology and more
817 followers |

Mike Simonsen

Astronomer, variable star junkie, writer, blogger, gardener, musician, madman
814 followers |

Stephen Serjeant

Astronomer at the Open University, roped into various OU/BBC things too. The views here do not necessarily blah blah.
811 followers |

Patricia Phillips

Space & science writer, poet, SpaceTweep,ex-NASA PIO, Native American storyteller. Rheumatoid arthritis warrior, wishes she could dance again.
794 followers |

aadhu ahid

astronomy enthusiast, stargazer, flashpacker, ex-lawyer, mostly harmless
676 followers |

Jonathan Tedds

Astronomer & research liaison, University of Leicester; Project lead: BRISSkit. Primary school chair of governors, musical dalliances, politics, thought & sport
581 followers |

Mike Peel

Astronomer, Wikimedian and photographer. Postdoc researcher at Jodrell Bank and Wikimedia UK trustee. All tweets are my own.
579 followers |

Hannah H

I'm a 17 y/o astronomy geek, an Open Uni student, blogger for @galaxyzoo and @_SigmaOrionis, writer and admin for the @youngastros, podcaster and a tad insane.
542 followers |

Richard Drumm

AKA Richard Drumm The Astronomy Bum, President, Charlottesville Astronomical Society
532 followers |

Dr. John D. Johnson

Champion of Science. Invoker of Logic. Promoter of Reason. Educator. Security Professional. Astronomer. Blogger. Skeptic.
424 followers |

Skymania

Latest astronomy and space news. Tips on choosing a telescope. Night sky guide.
389 followers |

Hal Hensley

I love most anything that involves astronomy, space, science, photography, music & computers.
322 followers |

Charles Bell

IAU MPC Observatory code H47 Vicksburg; Comet and Minor Planet Astrometry, Observation and Study
291 followers |

Craig

Researcher in planetary science and remote sensing geology. I play with thermal cameras, neutron detectors and video games. I like physics and electronics.
190 followers |

rstuik

Astronomer, Engineer, Wannebee Photographer
112 followers |

Misty Dawn Davies

New Mom. New PhD grad. Contractor for NASA Ames Research Center.
109 followers |

Curated by David Bradley

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Space, astronomy, stars, galaxies, planets, astronomers
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