The Speed Of Light

Galaxies come and go, but the speed of light stays constant! Tweets to @670616629MPH

[EarthSky @earthskyscience]

February 2016 guide to the 5 bright planets
https://t.co/19bBSJb8ZY

[The Evolving Planet @_evolvingplanet]

Watch The Earth “Breathe” In This Awesome Video
https://t.co/zClKo9qrDG
#earth

[The Mars Generation @TheMarsGen]

Watch @AstronautAbby tell her story and learn about how #TheMarsGeneration got started! https://t.co/pRhGbpfeKS #TheMartian #FutureOfSpace

[AmericaSpace @AmericaSpace]

NASA Shows Off Orion EM-1 Structure at KSC for Inaugural SLS Lunar Flight Test https://t.co/txq6vqWTUH

[Space Initiatives @AsteroidEnergy]

'I'd rather be up here … but only just': Tim Peake posts photos of Britain from space https://t.co/2jXTflhuTI

[Humanoid History @HumanoidHistory]

Inside mission control at the Johnson #Space Center on the first day of the Apollo 14 mission, January 31, 1971.

[MarsToday @marstoday]

How NASA Pulled off the Craziest Stunt on Mars, From the Guy Who Led the Team https://t.co/7v2oT8WWNw

[Peter Caltner @PC0101]

#Aurora over Iceland, Jan 30, by Ali, https://t.co/06qgZrB22U @TinaMeany @TamithaSkov @grniz2

[One Eye In Space @GallarottiA]

'MWC 922: The Red Square Nebula' Image: https://t.co/mI73BwsMi9

[David Blanchflower BSc @DavidBflower]

Reminder: Mars will appear close to the Moon tomorrow morning. Worth seeing. Weather permitting.

[LittleNorfolkPicture @NorfolkPicShop]

Norfolk can be a great place to see the night sky! #photo #norfolk #norfolkRT #norfolkbuzz https://t.co/Hwhxgjzikz

[Scott Kelly @StationCDRKelly]

A splash of #EarthArt over the #Bahamas! #YearInSpace

[The Mars Society @TheMarsSociety]

The Space Review: NASA’s Journey to Mars and ESA’s Moon Village enable each other https://t.co/LKjMZSiQxe

[Learn to Skywatch @Learntoskywatch]

Tonight's Target: Can you find the constellation Canis Major in the SE? Hint: Just look for the bright star Sirius.

[SpaceRef China @ChinaInSpace]

China’s 2016 Space Plans Detailed https://t.co/HfEM01Gb0k

[Alexandre H.L. Porto @xandaolp]

China Plans To Land The First Probe On The Far Side Of The Moon By 2018 https://t.co/zWndNnJVpa

[Laura Shell FRAS 🔭🔭📷🌌 @laurashell2]

Five planets — Mercury, Venus, Mars, Jupiter, Saturn — are all visible at once - https://t.co/sxxCeAd2uE https://t.co/6a4XQFDNN0