Space Related Twitter Accounts

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See also, list of twitter accounts: Official NASA | ...sorted by followers | Space Related (all others) | ...sorted by followers | NOAA
List on this twitter page: http://twitter.com/#!/tweetupspace/space-related/members
Total on this page: 170

This page is for twitter accounts that are not official NASA accounts. For example, companies and space contractors, private space (like @spacex) and so on.

Contents

Commercial Space

See also @flyingjenny's list here: http://twitter.com/#!/flyingjenny/space-entities/members
Total in this list: 15

Private/commercial space is comprised of non-governmental entities that currently offer – or are planning to offer – equipment and services geared towards spaceflight, both robotic and human spaceflight. For more info, see List of private spaceflight companies (Wikipedia)

@BoeingDefense Boeing Defense, Space & Security provides technologies that connect and protect, from the battlespace to outer space to cyberspace. http://www.boeing.com/bds/
@ISS_CASIS ISS National Lab The ISS U.S. National Laboratory is managed by the Center for the Advancement of Science in Space (CASIS). Kennedy Space Center, FL · http://www.iss-casis.org
@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. http://masten-space.com
@NanoRacks Entrepreneurial space company with permanent hardware in orbit. Commercial contributor to the U.S. National Lab on Space Station. Space 4 Everyone! International Space Station · http://NanoRacks.com
@OrbitalSciences Orbital Sciences of Dulles, Virginia. http://www.orbital.com
@PlanetaryRsrcs Planetary Resources The asteroid mining company. Bellevue, Washington · http://planetaryresources.com
@SpaceAdventures Vienna, VA The world’s premier private space exploration company. http://www.spaceadventures.com
@SpacePort_NM Spaceport America - The world's first purpose-built commercial spaceport. http://www.spaceportamerica.com
@SpaceX SpaceX is the future of space. Founded by Elon Musk, we design/manufacture/launch the American rockets & spacecraft revolutionizing space transportation. http://www.spacex.com
@TheNASTARCenter Southampton, PA, ETC's NASTAR Center is the premier air and space training, research, and education facility in the world. Our mission is to optimize human performance in extreme environments. http://www.nastarcenter.com/
@ULALaunch Denver, CO, United Launch Alliance. Atlas V, Delta II, and Delta IV launch vehicles. http://www.ulalaunch.com
@UnRocket Unreasonable Rocket http://unreasonablerocket.blogspot.com
@VirginGalactic The world's first commercial spaceline. http://www.virgingalactic.com
@SpaceAngels Space Angels Network, USA, Premier source of aerospace dealflow for investors and of early-stage capital for aerospace-related ventures. http://www.spaceangelsnetwork.com
@GoZeroG ZERO-G, Vienna, VA, a privately held space entertainment and tourism company http://www.gozerog.com

US Military Space & Other Government

Total in this list: 7
@45thSpaceWing The Official Patrick Air Force Base Twitter - News from Cape Canaveral, the Eastern Range and Patrick! Bringing space to you! http://www.patrick.af.mil
@AFSpace Official Air Force Space Command Twitter: Stay up to date on all things AF Space! http://www.afspc.af.mil
@100YSS 100 Year Starship™, DARPA's 100 Year Starship™ Study seeks to develop a sustainable model for long-term, private-sector investment into disciplines needed for interstellar travel. http://100YSS.org
@NOAA NOAA provides science, service and stewardship to protect life and property, and conserve/protect the Earth's natural resources. (Follows are not endorsements). National (Formerly @usNOAAgov) · http://www.noaa.gov
@NOAASatellites NOAA Satellite and Information Service - The Office of Satellite and Product Operations highlights satellite imagery, hazard products, direct services, etc. Suitland, MD · http://www.ospo.noaa.gov/
@TeamAFRL Air Force Research Laboratory
@AFOSR Arlington, VA, Air Force Office of Scientific Research (AFOSR) is the basic research component of the Air Force Research Laboratory (AFRL). http://www.afosr.af.mil

Nanosats & Hobby Space

Total in this list: 3
@SurreyNanosats Surrey Nanosats, Guildford, Surrey, UK, Join us getting geeky about STRaND-1: our smartphone nanosatellite we can’t wait to launch. Don’t miss our #SpaceApp contest on FB -Your app could fly in space! http://www.facebook.com/nanosats
@SurreySat Surrey Satellites, Guildford, UK, Changing the Economics of Space - SSTL is the World's premier small satellite manufacturer http://www.sstl.co.uk
@AMSAT_UK AMSAT-UK Providing valuable assistance to the Amateur satellite programme. @m0tfo UK · amsat-uk.org

SpaceUp Accounts

Total in this list: 15

SpaceUp is an unconference for space, here are all the accounts. See http://spaceup.org

@SpaceUpConf an unconference for space enthusiasts http://spaceup.org
@SpaceUpBHM Birmingham, AL, USA Tweeting the SpaceUp Birmingham!
@SpaceUpDC Washington, DC, USA, Hello DC. Join us for great talks on robots, nuclear rockets, & whether getting a haircut in space is worth the effort. Inspire us and we'll try to inspire you! http://spaceupdc.org
@SpaceUpHou Houston, TX, USA We nurture new and radical concepts, help develop partnerships, and is meant for you to create a future worth living in. You decide what happens next. http://spaceuphouston.org
@SpaceUpLA Los Angeles, CA, USA, A space unconference for people who care about space and want to play a part in it. http://spaceupla.org
@SpaceUpNM New Mexico, USA #SpaceUp #NASA #Spaceport #VirginGalactic #NASATweetup. Hoping to find other space geeks in New Mexico for a first event. http://spaceup.org
@SpaceUpNY New York City, NY, USA the official Twitter account of SpaceUp NY http://www.spaceupny.org
@SpaceUpSanDiego San Diego, CA, USA, a SpaceUp unconference, Feb 12-13 at UC San Diego http://spaceup.org/sandiego
@SpaceUpEU Genk, Belgium, a SpaceUp unconference, Sept 22-23 at Cosmodrome Genk, Belgium http://spaceup.eu/
@SpaceUpStgt Stuttgart, Germany, a SpaceUp unconference, Oct 27 at Uni Stuttgart, Germany http://spaceup.org/near-you/stuttgart
@SpaceUpPL Warsaw, Poland, a SpaceUp unconference, Nov 24-25 at PIAP, Warsaw, Poland http://www.spaceuppl.com
@SpaceUpIndia Bangalore, India, a SpaceUp unconference, Dec 1 2012, Bangalore, India http://spaceupindia.org/
@SpaceUpSaudi Jeddah, Saudi Arabia, a SpaceUp unconference, January 2013 (?) http://spaceup.org/near-you
@SpaceUpParis Paris, France, a SpaceUp unconference, May 2013
@SpaceUpUK London, UK, a SpaceUp unconference, TBD 2013

Other countries

Main

Total in this list: 23
@spacegovuk UK Space Agency, Swindon, England, The official Twitter account of the UK Space Agency. The Agency is at the heart of UK efforts to explore and benefit from space., http://www.bis.gov.uk/ukspaceagency
@CSA_ASC Canadian Space Agency Saint-Hubert, Quebec, Canada http://www.asc-csa.gc.ca/eng/default.asp (English)
@ASC_CSA Agence Spatiale Canadienne Saint-Hubert, Quebec, Canada http://www.asc-csa.gc.ca/fra/default.asp (French)
@CNES_France Paris, France, French Space Agency CNES. L'actu du CNES, l'agence spatiale française http://www.cnes.fr
@DLR_de Köln / Cologne, Germany, Deutsches Zentrum für Luft- und Raumfahrt (DLR). Es twittert das Online-Team der DLR-Kommunikation. For Updates in english please follow @DLR_en http://www.dlr.de
@DLR_en German space agency (DLR), German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) Sign up for news at http://bit.ly/dAlcfV Follow @DLR_de for updates in German http://www.dlr.de/en/
@ESA European Space Agency, keeping you posted on European space activities. http://www.esa.int
@esaACT The Advanced Concepts Team of the European Space Agency. Pages we read http://www.esa.int/gsp/ACT/index.htm
@ESA_es ESA España - http://www.esa.int/esaCP/Spain.html
@ESA_Italia ESA l'Agenzia Spaziale Europea. Notizie sulle attivitá spaziali fornite in italiano dall'Agenzia Spaziale Europea http://www.esa.int/esaCP/Italy.html
@ESA_nl De Europese ruimtevaartorganisatie ESA houdt je in het Nederlands op de hoogte van Europese ruimteactiviteiten. http://www.esa.nl
@ESAOperations Darmstadt, Germany, From low Earth to deep space: keeping up with spacecraft operations at ESA - Europe's space agency. More via: http://www.esa.int/ops http://blogs.esa.int/atv
@ESAscience Science @ the European Space Agency ESA, keeping you posted on European space science activities. http://sci.esa.int
@ESO_Observatory Garching, Germany, The European Southern Observatory (ESO) is the most productive observatory in the world. This official account is managed by @oanasandu http://www.eso.org
@fka_roscosmos Russian Space Agency Roscosmos. ФЕДЕРАЛЬНОЕ КОСМИЧЕСКОЕ АГЕНТСТВО ( РОСКОСМОС ) http://www.federalspace.ru/
@HollandSpaceCen Holland Space Center - communicate and educate Space and Astronomy for youngsters! Follow us! Inspired by European Space Agency. Attendee #spacetweetup Sept18 http://www.hollandspacecenter.nl
@ISRO Indian Space Research Organization (ISRO) http://www.isro.org/
@JAXA_en Chofu-City, Tokyo, Japanese Space Agency, english language Twitter account. Follow @JAXA_jp for updates in Japanese. JAXA performs various activities related to aerospace as an organization, from basic research in the aerospace field to development and utilization. http://www.jaxa.jp/index_e.html
@JAXA_jp 東京都調布市 JAXA(宇宙航空研究開発機構)は、宇宙航空分野の基礎研究から開発・利用に至るまで一貫して行うことのできる機関です。 Twitterでは、主にJAXAウェブサイトの更新情報をお伝えしています。 http://www.jaxa.jp
@MARS_500 Account for the 520-day ESA-supported Mars mission simulation in Moscow in 2010-2011. Virtual landing in November 2011!
@MST_Aerospace MST Aerospace is the exclusive technology broker for ESA – the European Space Agency. This is our international aerospace news channel (English/German language) http://www.mst-aerospace.de
@SpaceTweetup Cologne, Germany Follow us for announcements & info on DLR/ESA Tweetups. Next SpaceTweetup: 18 Sep 2011 at DLR's German Aerospace Day, Cologne, Germany. http://bit.ly/pJFxNG
@SpaceAtSurrey Surrey Space Centre. Welcome to the Surrey Space Centre Twitter, the home of world class space research at @UniOfSurrey! Guildford, United Kingdom · http://www.surrey.ac.uk/ssc

Astronauts

See also this page: CollectSpace - Astronauts you can follow on Twitter

Only put foreign country astronauts in this list, NASA astronauts should go in the Official NASA list (see bar on top).

Total in this list: 32
@OlegMKS Oleg Artemyev - Космонавт-испытатель #Роскосмос Россия. Бортинженер #МКС - Test Cosmonaut #Roskosmos Russia. Flight Engineer #ISS #Exp39/40 #Exp40
@Msuraev Макс Сураев - Лётчик-Космонавт
@AntonAstrey Anton Shkaplerov - Russian cosmonaut. Former Russian Air Force fighter pilot. International Space Station Exp 29/30. Next start: Nov 2014 for Exp 42/43.
@Astro_Jeremy Jeremy R. Hansen - Canadian Space Agency Astronaut since 2009. Ontario-native and former CF-18 fighter pilot.
@Astro_DavidS David Saint-Jacques - Astronaute de l'Agence spatiale canadienne; médecin, ingénieur, astrophysicien. Canadian Space Agency Astronaut; doctor, engineer, astrophysicist.
@Astro_Andre André Kuipers - 11dys in space '04.Next:Soyuz TMA-3M,December'11,ISS Expedition 30/31.ESAs PromISSe mission.Return May'12. Yes,moon landings were real.No,never seen a UFO. http://blogs.esa.int/andre-kuipers/
@Astro_Andreas Andreas Mogensen - European Space Agency astronaut of Danish nationality and aerospace engineer.

http://videnskab.dk/profil/andreas-mogensen

@AstroDaveMD Dave Williams - Canadian Astronaut, Aquanaut, Speaker and Physician http://astronautdavewilliams.com
@Astro_Alex Alexander Gerst - European of German nationality, @ESA astronaut, geophysicist, volcanologist and explorer. Living and working on the International Space Station.
@Astro_Luca Luca Parmitano - I'm a European astronaut of Italian nationality. I'm currently training for ISS expedition 36.
@Astro_Naoko 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。)
@Astro_Paolo Paolo Nespoli, European Space Agency Astronaut, Flight Engineer of ISS Expedition 26/27 (Dec 2010 - May 2011)
@AstroSamantha Samantha Cristoforetti - European Space Agency astronaut. Italian Air Force officer.Training to fly to the ISS one day. Honoured to be part of the great endeavour of space exploration. http://www.esa.int/spaceflight
@Astro_Satoshi Satoshi Furukawa (on ISS right now; Expedition 28/29) - 米国(ヒューストン)、ロシア、日本(筑波)など http://iss.jaxa.jp/
@Astro_Soichi Soichi Noguchi 野口 聡一, Long duration space flight on ISS! http://amzn.to/noWkp3 http://bit.ly/3ZMbEb http://bit.ly/bXNO6I http://bit.ly/bGfUrB http://linkd.in/ePb57v
@CFuglesang Christer Fuglesang - Swedish physicist and an ESA astronaut
@astro_timpeake Tim Peake - ESA astronaut, test pilot and British Army Air Corps officer. Preparing for Exp 46/47 to the International Space Station, launch Nov 2015.
@Aki_Hoshide 星出 彰彦 (JAXA宇宙飛行士) - JAXA宇宙飛行士。 2008年6月、スペースシャトル「ディスカバリー号」でSTS-124/1Jミッションに参加、国際宇宙ステーション(ISS)「きぼう」日本実験棟の組立に携わる。2012年7月〜11月、ISSに長期滞在。
@Astro_Wakata Koichi Wakata - JAXA Astronaut, ISS Expedition 39 Commander
@Thom_astro Astronaute européen français, ingénieur & pilote Air France | Volera vers l'ISS en Nov 2016
@spacetihon Nikolay Tikhonov
@Astro_Kimiya 油井 亀美也 Kimiya.Yui - 2009年2月 宇宙飛行士候補者として選抜される。2011年7月 ISS搭乗宇宙飛行士として認定される。2012年6月 NEEMO16に参加, In 2011 became a JAXA astronaut, Кимия Юи;В 2011 году стал астронавтом JAXA
Retired Astronauts
@Cmdr_Hadfield Chris Hadfield. Mission specialist on STS-74 and performed multiple EVAs on STS-100. Currently training as the commander of Expedition 35. http://www.asc-csa.gc.ca/eng/default.asp
@astro_duque Pedro Duque - Aerospace Engineer UPM, Worked in GMV, European Space Agency, Deimos Imaging (Elecnor) Astronaut since 1992. Two sp. flights, STS-95 (1998) and Cervantes (2003)
@AnoushehAnsari Anousheh Ansari - Imagine.Be the change.Inspire
@MarcGarneau Marc Garneau - Député de Westmount-Ville-Marie. MP for Westmount-Ville Marie
@DrFaizKhaleed Faiz Khaleed
@Ockels Wubbo Ockels - Astronaut, Sustainable development professor
@Astro_Pontes Marcos Cesar Pontes - First Brazilian Astronaut. Flew to ISS in March 2006 - Soyuz TMA-8 crew. Professor, Author, Consultant, Executive & Life Coach, and Motivational Speaker.
@RobertThirsk Robert Thirsk - Former Canadian Astronaut and now VP at CIHR - Ancien astronaute canadien et VP aux IRSC
@Astro_Naoko Naoko Yamazaki - Mission Specialist Astronaut on STS-131. Retired from JAXA in Aug'11. Dreams for space will continue...☆
@MsCoolAstro Soyeon Yi - Wanna be a Crazy, Sexy & Cool Astronaut

Flight missions

Total in this list: 4
@ESA_cryosat ESA's CryoSat mission is dedicated to precise monitoring of marine ice in the polar oceans and variations of ice sheets overlying Greenland and Antarctica. http://earth.esa.int/cryosat
@ESAHerschel A European Space Agency (ESA) mission which will be the most sensitive far-infrared telescope ever put into space. http://www.esa.int/herschel
@Philae2014 In 2014 Philae will land on a comet as part of the European space mission Rosetta. Philae is operated by the DLR Microgravity User Support Center in Cologne. http://www.dlr.de/rb/en/desktopdefault.aspx/tabid-4538/admin-1//7439_read-11269/
@Planck A European Space Agency (ESA) spacecraft to understand the origin and evolution of our Universe http://www.esa.int/planck

Space Rockstars (individuals: scientists, PR, etc.)

Total in this list: 7
@neiltyson Neil deGrasse Tyson, New York City, Astrophysicist, American Museum of Natural History. Author: The Pluto Files, Death By Black Hole. Host: StarTalk Radio http://StarTalkRadio.net http://www.haydenplanetarium.org/tyson/
@BadAstronomer Phil Plait, Boulder, Astronomer, author, skeptic, father, punster. http://blogs.discovermagazine.com/badastronomy
@ClaraMoskowitz New York, NY, Senior Writer for SPACE.com and LiveScience.com http://www.space.com
@jeff_foust Space industry analyst, writer, blogger, baseball fan. Links not endorsements; opinions my own. Rockville, Maryland, USA · http://www.jfoust.com
@TheScienceGuy Bill Nye, Los Angeles, CA, USA, Science Educator seeks to change the world... http://billnye.com
@PeterDiamandis PeterDiamandis X PRIZE, Singularity Univ, Planetary Resources & Author of Abundance... Passionate about innovation and creating a world of Abundance. iPhone: 34.060616,-118.444359 · diamandis.com
@Bob_Richards Bob Richards. Space entrepreneur. Orphan of Apollo. A Founder of the International Space University, Singularity University, SEDS, Space Generation & Moon Express (CEO). A pale blue dot called Earth. · http://www.robertdrichards.com

Space Media/Orgs

Television, magazine, and other media outlets for space exploration, astronomy, and other space topics.

Specifically space

Total in this list: 39

Our definition of difference is media orgs primarily put out media in the form of a magazine, blog, podcast, video program, whereas advocacy organizations do advocacy primarily, and talk about it secondarily.

@AIAA The World's Forum for Aerospace Leadership http://www.aiaa.org Trade organization
@AIAA_PubPolicy AIAA Public Policy, Headquartered in Reston, VA, The World's Forum for Aerospace Leadership http://www.aiaa.org/publicpolicy
@airandspace SmithsonianAirSpace, Washington, DC, The Smithsonian Institution National Air and Space Museum maintains the largest collection of historic air & space objects in the world. http://www.nasm.si.edu
@AirAndSpaceCOMM Communications office for Smithsonian's National Air and Space Museum - press releases, media advisories, interviews & museum news coverage. http://www.nasm.si.edu Museum/full website
@AstronomyMag Astronomy Magazine, Waukesha, Wisconsin, Astronomy informs, entertains, and inspires people who are interested in the science and hobby of astronomy. http://www.Astronomy.com Magazine
@AstronomyNow http://www.astronomynow.com Magazine
@astrospacenow 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. http://www.astrospacenow.com
@BBC_Space BBC SPACE Tweets on all things Astronomy, Space and Cosmic from across the BBC. http://www.bbc.co.uk/science/space/ TV Boadcast
@CollectSpace The Source for Space History & Artifacts http://www.collectspace.com/ Editor & Founder: @RobertPearlman Blog/full website
@cosmiclog MSNBC Blog - Cosmic Log, Redmond, WA, Here's where you can get the autofeed for Alan Boyle's Cosmic Log items when they're published. http://www.cosmiclog.com Blog
@Discovery_Space Discovery Space, Earth, Sol, Milky Way, The space topic hub for @Discovery_News. All things astronomy, physics, cosmology, spaceflight, NASA, exoplanets & more! (Administered by @astroengine.) http://news.discovery.com/space/ Full newsmedia/blog
@EvaDot We celebrate ideas http://evadot.com Podcast
@Exoplanetology Outer Worlds & Deep Space, The Art and Science of New Worlds. Explores the impact of Exoplanet discoveries on Humanity's Culture and Future. http://bit.ly/Twanifesto http://www.exoplanetology.com Blog
@HobbySpacer Clark Lindsey, Rockville, MD, Publisher and editor of HobbySpace.com, SpaceTransportNews.com and Space-for-All.com. http://www.hobbyspace.com Website
@MarsToday http://www.marstoday.com Blog
@MoonandbackGuy Sacramento, California, managing editor, journalist, documentary filmmaker http://moonandback.com Blog
@NASAWatch http://www.nasawatch.com Blog
@newspacejournal NewSpace Journal, Beyond Earth, Following the emerging NewSpace industry http://www.newspacejournal.com
@PTTU Portal to Universe. Keep up to date with latest cutting-edge astronomy and space science breakthroughs via Portal To The Universe. (An original IYA2009 Project) Everywhere · http://www.portaltotheuniverse.org/
@RussianSpaceWeb Anatoly Zak, Earth surface, Space journalist, illustrator http://www.russianspaceweb.com
@SkyAtNightMag UK, The official Twitter feed for Sky at Night Magazine http://www.skyatnightmagazine.com Magazine
@Space Space and science news from sciencenewsblog.com http://www.sciencenewsblog.com Blog
@SpaceDotCom News coverage and conversation about space science, astronomy and exploration http://www.SPACE.com Full website/blog
@SpaceFellowship An international news and information network based in the UK and dedicated to the space industry. http://www.spacefellowship.com Full website/blog
@SpaceflightNow Spaceflight Now, Cape Canaveral, Florida, The best source for space news http://spaceflightnow.com Full website/blog
@SpaceFlorida Space Florida, Kennedy Space Center, FL, Space Florida was created to strengthen Florida’s position as the global leader in aerospace research, investment, exploration and commerce. http://www.spaceflorida.gov Blog
@SpaceLaunchNews Providing multimedia coverage of world space launches & missions from Cape Canaveral. http://SpaceLaunchNews.com Full website
@Space_News_Intl A weekly international newspaper for the global space community. http://www.spacenews.com Weekly publication/website
@SpaceRef Reston, VA, Space News as it Happens http://spaceref.com/ News website
@spaceteam Florida Today Space, Kennedy Space Center, FL, FLORIDA TODAY's space team covers NASA and the space industry around the clock from Kennedy Space Center. http://space.flatoday.net Full website
@SpaceTweeps The official Twitter account of the Space Tweep Society. Posting news & updates on society happenings. #STwS #spacetweeps http://spacetweepsociety.org/ See also @endlessbbq Blog/full website
@SpaceVidCast Making Space Commonplace! New media company looking to the stars. http://www.spacevidcast.com Vidcast
@StarTalkRadio Neil deGrasse Tyson, New York City, StarTalk, a weekly radio show that combines science and comedy, features Neil deGrasse Tyson, director of the Hayden Planetarium and host of NOVA ScienceNOW. http://startalkradio.net
@SungrazerComets Sungrazing Comets, The Sungrazer project allows amateur astronomers world-wide to discover comets in images from NASA's SOHO and STEREO missions... now with over 2000 discoveries! http://sungrazer.nrl.navy.mil
@talkingspace Talking Space, The Universe and Beyond, The Talking Space Podcast: A Free and Open Exchange of Ideas and Opinions on All Things Space. http://talkingspaceonline.com Podcast
@TWCSpaceWX Space Weather from The Weather Channel - http://www.weather.com Cable channel/full website
@Via_Satellite Via Satellite. For nearly 30 years, Via Satellite magazine has provided expert business analysis and technical insights into the #satellite, #telecom and #wireless industries. Rockville, MD · http://www.satellitetoday.com

Space Advocacy (that arent primarily media)

Total in this list: 22

Our definition of difference is media orgs primarily put out media in the form of a magazine, blog, podcast, video program, whereas advocacy organizations do advocacy primarily, and talk about it secondarily.

@B612foundation B612 Foundation Finding asteroids before they find us. RTs not endorsements. Do you want to help? http://b612foundation.org/getinvolved/ #B612 Silicon Valley + Blue Marble · b612foundation.org
@BIS_spaceflight British Interplanetary Society. The BIS is the world’s longest established organisation devoted to the promotion of astronautics both nationally and internationally. London, UK · bis-space.com
@ChallengerCtr Challenger Center in Alexandria, Virginia. By transforming the way teachers teach and students learn, we are creating a new generation of explorers. http://www.challenger.org
@CSFcaptureflag Commercial Spaceflight Capture the Flag Competition - which company will be the first to retrieve the U.S. flag on the International Space Station?
@exploreplanets Planetary Society, You can do more than just witness advances in space exploration – you can help make them happen! Join the world's largest space exploration team! http://planetary.org
@iafastro International Astronautical Federation. Connecting space people. Paris · http://www.iafastro.org
@ISUnet International Space University, Strasbourg, France, Providing interdisciplinary, international, and intercultural Graduate education and professional development opportunities to the space sector http://www.isunet.edu/
@isuusa ISU*USA, United States of America, International Space University USA Alumni Association http://isu-usa.org
@MinorPlanetCtr Minor Planet Center IAU branch managing worldwide observations of minor planets and comets, calculating their orbits, and figuring out which ones pose a threat to planet Earth! Cambridge, MA (USA) · MinorPlanetCenter.net
@MyMoonLPI Lunar Planetary Institute's MyMoon. RT does not mean endorsement. Portal for lunar science, exploration, and art. Houston, TX · http://www.mymoonspace.com
@NSS Chapters around the world, The National Space Society is an educational, grassroots, non-profit organization dedicated to the creation of a spacefaring civilization. http://www.nss.org
@NSSFlorida NSS Florida, Florida, USA, Earth, Florida Space Coast chapter of the National Space Society http://NSSFlorida.org
@sedsusa USA, Students for the Exploration and Development of Space, the world's only student run space organization! http://www.seds.org
@SETIInstitute The SETI Institute, Mountain View, CA, We believe we are conducting the most profound search in human history — to know our beginnings and our place among the stars. http://www.seti.org
@SGAC Space Generation Advisory Council in support of the United Nations Programme on Space Applications http://www.spacegeneration.org
@SpaceFrontier People dedicated to opening the space frontier to human settlement http://spacefrontier.org
@SpaceFoundation Space Foundation. An international nonprofit organization advancing space-related endeavors to inspire, enable, and propel humanity. Colorado Springs · http://www.SpaceFoundation.org
@TEA_in_Space The non-partisan, grassroots twitter account for the TEA Party in Space dedicated to fiscal responsibility, limited governement and free markets in space. http://www.teapartyinspace.org
@TexasSpace A new Texas space industry and culture encompassing all aspects of space - including scientific, educational, governmental and commercial.

http://www.texasspacealliance.org

@SpcPlcyOnline Marcia Smith, SpacePolicyOnline.com provides news and analysis about U.S. and foreign civil, commercial, and military space programs. Its editor is Marcia Smith. http://SpacePolicyOnline.com
@twisst Twisst ISS alerts, Netherlands, Twisst sends you a tweet when the international space station (ISS) will be visible at your location. Created by journalist/webdeveloper @tjaap. #science #space http://www.twisst.nl
@WomeninAero Women in Aerospace (WIA) is dedicated to expanding women's opportunities for leadership and increasing their visibility in the aerospace community. Washington, DC · http://womeninaerospace.org/

Space Conferences and events

Total in this list: 11

These organizations are primarily known for putting on a yearly or periodic event.

@endlessbbq Space Coast, Florida, The epic @spacetweeps gathering centered around rocket launches- #endlessBBQ! See you there! http://endlessbbq.com
@NewSpaceCon NewSpace Conference, Mountain View, CA, @SpaceFrontier's annual Conference highlights NASA-private cooperation, business of #NewSpace, & frontier enabling tech of tomorrow. NS11: July 28-31 in CA. http://newspace2011.spacefrontier.org/
@ISDC The International Space Development Conference is the premier space activist conference, organized each May by @NSS http://isdc.nss.org
@ISPCS Las Cruces, New Mexico, International Symposium for Personal and Commercial Spaceflight http://www.ispcs.com
@spacetechexpo Space Tech Expo is the world's only exhibition dedicated to the design, build and testing of satellites and spacecraft. May 21-23, 2013 Long Beach, CA. Long Beach, CA, USA · http://spacetechexpo.com
@TEDxNASA USA, Ideas Worth Spreading - TEDxNASA@Silicon Valley coming Aug. 2011 http://tedxnasa.com/
@TEDxNASAJSC TEDxNASAJSC, Houston, TX, 3/2/11 TEDxNASAJSC @ NASA's Johnson Space Center. TEDxYouth@NASAJSC was held at Space Center Houston 11/20/10 https://sites.google.com/site/tedxyouthnasajsc/ http://www.ted.com/tedx/events/2028
@yurisnight Earth every April 12th, A global celebration of the first human to go to space and his message to come together to enhance and protect our planet, not destroy it. http://yurisnight.net
@yurisnightdc Washington, DC, The official twitter feed for Yuri's Night DC, on April 12, 2011 at Science Club. Check our facebook page for more details. http://on.fb.me/yndc11 http://yurisnight.net/partylist/?partyid=1408
@YNHouston Houston,TX Let us celebrate accomplishing the impossible and humanity's true potential. http://www.houstonspacefest.com
@YurisNightSC Florida's Space Coast, Join us on April 9th, 2011 for a Yuri's Night Pub Crawl and NSS event in Cocoa Beach! Details soon-

Other science

This section not counted in top list

These accounts may not specifically be space, but have space sprinkled along with other science-y topics.

Note: these accounts are not counted for the sorted by followers list.

@ArmedwScience U.S. Defense Department's science and technology blog. You've been SCIENCED! http://science.dodlive.mil
@CAScienceCenter California Science Center in Los Angeles, CA. (Receiving Space Shuttle Endeavour.) We aspire to stimulate curiosity and inspire science learning in everyone by creating fun, memorable experiences. http://www.californiasciencecenter.org
@CERN CERN, the European Organization for Nuclear Research, is the biggest particle physics laboratory in the world. http://www.cern.ch
@CNNLightYears Light Years strives to tell the stories of science research, discovery, space and education. Find us at cnn.com/lightyears. http://www.cnn.com/lightyears (Blog that often covers space)
@FragileOasis The focus is not on the problems of the world but on how the problems of the world are being solved by amazing people http://www.fragileoasis.org
@IntrepidMuseum Intrepid Sea, Air & Space Museum in New York, NY. (Receiving Space Shuttle Enterprise.) Mission: Honor our Heroes, Educate the Public & Inspire our Youth. http://www.intrepidmuseum.org
@NSF National Science Foundation - where discoveries begin [administered by @pffli] http://www.nsf.gov/sciencefrontiers/
@ScienceChannel Silver Spring, MD, Thought-provoking updates, insider news and more from Science Channel...show your #nerdtweet pride! http://science.discovery.com/#mkcpgn=twsci1
@wiredscience WIRED Science, San Francisco, California, Science, space, energy and robot sharks with lasers. Hosted by the Wired Science team: @betsymason, @9brandon, @davemosher & @danielleventon. http://www.wired.com/wiredscience/

Google Lunar X Prize

...and other Space related X Prize accounts.

Total in this list: 11
@glxp The official Google Lunar X PRIZE Twitter account. Going back to the moon, and taking you with us. http://www.googlelunarxprize.org
 
@arcaspace Romania, ARCA - organization that promotes innovative aerospace projects. http://www.arcaspace.com
@astrobotic Pittsburgh, PA http://astrobotictech.com
@Moon_Ex MoonEx is a privately funded lunar transportation and data services company establishing new avenues for commercial space activities beyond Earth orbit. http://www.moonexpress.com
@NextGiantLeap Boulder, CO Lunar payload delivery services. http://www.nextgiantleap.com
@Odyssey_Moon U.S., Canada & Isle of Man, 1st @GLXP Team - Odyssey Moon is developing a commercial transportation system to deliver payloads to the Moon in support of science, exploration and commerce. http://www.odysseymoon.com
@OmegaEnvoy USA, We are the Florida Team competing in the Google Lunar X PRIZE. We are students, engineers, entrepreneurs, and space geeks: Join us on our awesome adventure! http://www.omegaenvoy.org
@PTScientists We are a Germany-based team of scientists and engineers aiming to send a rover to the Moon by 2013! http://www.ptscientists.com
@Selenokhod Moscow, Selenokhod Ltd. Space robotics. Google Lunar X PRIZE - Russian Team. http://selenokhod.com
@TeamFREDNET Team FREDNET is an open source and open participation competitor in the Google Lunar X PRIZE http://TeamFREDNET.org
@whitelabelspace Europe, White Label Space is a brandless space tech startup & Official Google Lunar X PRIZE competitor http://www.googlelunarxprize.org/lunar/teams/white-label-space

Space Citizen Science

Total in this list: 7

Hackathons, participatory space, etc.

@galaxyzoo It's Galaxy Zoo! http://galaxyzoo.org
@moonzoo The Moon, See the Moon as never before! http://www.moonzoo.org
@planethunters The Zooniverse, With your help, we are looking for planets around other stars. We're using data from NASA's Kepler mission. http://planethunters.org
@milkywayproj Our Galaxy, Citizen Science from the Zooniverse using data from NASA's Spitzer Space Telescope. Tweets from the development team at Zoo HQ. http://www.milkywayproject.org
@solarstormwatch Royal Observatory Greenwich, We're building a prediction of Earth-bound solar storms, using classifications made by Solar Stormwatch members. http://solarstormwatch.com
@the_zooniverse Zooinverse HQ, A collection of websites where we ask the public to help us do real science online. Our projects include, Galaxy Zoo, Old Weather, Planet Hunters and more... http://zooniverse.org
@spacehack a directory of ways to participate in space exploration. http://spacehack.org

Space Grant Related

Total in this list: 4

See: http://www.nasa.gov/offices/education/programs/national/spacegrant/home/index.html & http://www.nasa.gov/offices/education/programs/national/epscor/home/index.html

@NASA_NSGC NASA NE Space Grant, Omaha Nebraska http://www.ne.spacegrant.org/
@OSGC Oregon Space Grant, Corvallis, Oregon, Supports NASA's projects through science and engineering education and outreach. http://oregonspacegrant.wordpress.com
@SpaceshipEarthGrants Spaceship Earth Grants (SEG) http://www.spaceshipearthgrants.com
@SpaceGrant Montana Space Grant Consortium (MSGC) http://spacegrant.montana.edu
@WYSpaceGrant Wyoming Space Grant, Laramie, WY, Space Grant supports science, math, engineering, and technology education, research, and public outreach. http://wyomingspacegrant.uwyo.edu/

Out of Date

These accounts have not been updated in over 6 months. (Check status - September 2014)

@AgenziaSpaziale Follow the Italian Space Agency on asitv.it! http://www.asi.it
@Chandrayaan1 200 kms circular lunar polar o, I am India's first mission to the moon. This is the unofficial twitter feed. http://www.isro.gov.in/chandrayaan/index.htm
@Astro_SPDM Canada's 2-armed robot, orbiting on ISS since 2008. (This is an unofficial feed aimed at those knowledgeable about ISS and the MSS.) - unofficial feed
@Prof_S_Hawking Stephen Hawking, Cambridge, UK, Theoretical physicist and Lucasian Professor of Mathematics at the University of Cambridge. Likes: black holes, cats and watching TV. http://www.hawking.org.uk/
@cswiki http://commercialspace.pbwiki.com
@TeachersInSpace Seattle, WA, The Teachers in Space program wants to put a thousand astronaut teachers into American classrooms, within the next decade. http://www.teachersinspace.org/
@Regolith_Chal Regolith Excavation, CA, Regolith Excavation Challenge: A prize competition to spur new tech for excavating lunar regolith. http://regolith.csewi.org/
@NASA_TV USA, NASA TV live video feed from space. Watch as NASA returns to the Moon, Mars and beyond. NASA Fan Site. http://www.spacelivefeed.com
@ThisWeekinSpace Miles O'Brien, Kennedy Space Center, FL, Hosted by Miles O'Brien. Powered by spaceflightnow.com http://spaceflightnow.com
@news_aiaa Reston, VA, The World's Forum for Aerospace Leadership http://www.aiaa.org
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