NASA History OfficeVerified account

#30Years #WeWillNeverForget Scobee Smith Resnik Jarvis McNair Onizuka McAuliffe pic.twitter.com/ljnPp2weKU

#NOW (11:38 am EST) in 1986, STS-51L #Challenger launches; destroyed 73 seconds into flight https://www.nasa.gov/multimedia/imagegallery/image_gallery_2437.html … pic.twitter.com/S9IdBo35UJ

#NOW (6:31 PM EST) a fire breaks out on pad in AS-204; Apollo 1 crewmembers--Grissom, Chaffee & White--perish pic.twitter.com/sS2eKiiohW

#Today in 1985, the STS-51C, a very short 3-day mission, landed. Learn more here: http://www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-51C.html … pic.twitter.com/xkxlwxMqGv

In 1966, George E. Mueller drew this concept sketch of the Skylab which launched in 1973. #WayBackWednesday pic.twitter.com/56NuJou4uy

#OTD in 1888, the National Geographic Society was founded to "to increase and diffuse geographic knowledge." pic.twitter.com/q92swkJZTs

#Remembering Rocco Petrone on the day in 1973 when he became @NASA_Marshall Center Director. pic.twitter.com/9KcMmZBwUv

#OTD in 1953, the 1st Experimental Aircraft Association (EAA) meeting took place. Image: EAA founder Paul Poberezny pic.twitter.com/cQGpcsPeou

#OTD in 1962, Ranger III--1st @NASA attempt to land on the Moon--launched & missed. http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1962-001A … pic.twitter.com/Glz3bks4CT

We've come a long way in 2 million years @NMNH #TransformationTuesday Bottom: Early human tools Top: The ISS pic.twitter.com/AeHXSmYLqM

Overcoming obstacles, @NASANewHorizons rocketed to Pluto this month in @NASAhistory: http://go.nasa.gov/1Sh0MnO  pic.twitter.com/ZjI5xqwhgN

#Happybirthday to astronaut Mario Runco, 3-time shuttle veteran who logged 551 hrs in space! http://www.jsc.nasa.gov/Bios/htmlbios/runco.html … pic.twitter.com/qWYyY2Prul

Happy 80th birthday to my one and only—project scientist, that is! Pics from today's salute to Ed Stone at @NASAJPL pic.twitter.com/9G7QeVybw6

We kicked off our diamond anniversary today, recreating the groundbreaking of our center 75 years ago. #NASAglenn75 pic.twitter.com/UTFtHkQinb

#OTD in 2003, the Solar Radiation and Climate Experiment (SORCE) launched. Read more: http://www.nasa.gov/mission_pages/sunearth/news/sorce-10yrs.html … pic.twitter.com/jK2Tt26FnP

#OTD in 1994, Clementine I--a lunar mapping mission--launched. This is Clementine's image of the lunar south pole pic.twitter.com/mTbOn1TGxV

#OTD in 1984, President Ronald Reagan announces the Space Station project. Watch here: http://www.c-span.org/video/?c4549817/reagan-space-station-challenge-sotu-84 … pic.twitter.com/5ArVHhBKeT

#OTD in 1964, Echo 2--135 foot diameter balloon--launched on a US rocket. Early commmunication satellite #satelloon pic.twitter.com/ErJKLr1QoS

Last year, the Cassini probe captured this photo of a geyser erupting from Saturn's moon Enceladus #MoonCrushMonday pic.twitter.com/VsfW5zTHso

Moons of Uranus & #Shakespeare - what's the connection? @FolgerLibrary knows: http://www.folger.edu/shakespeare-unlimited-episode-15 … pic.twitter.com/CLEkFMEFwD