How big is the ISS compared to your house? This wonderful visualisation tool shows you: http://t.co/SmlMc1R9 #bbc #howbigreally

You might actually see Discovery in the coming days as a small dot trailing ISS! Follow us or check http://bit.ly/haSX0F #sts133

Just 3 more days until the Perseid meteor shower! Join in the Twitter #meteorwatch, 11-13 of august: see http://www.meteorwatch.org

Beautiful photo of a large part of Europe at night, taken from the ISS: http://j.mp/ptCHTw (click to enlarge!) #NASA

Maybe there are more people who don't know this: @nasa has a live video stream from the space station! http://t.co/JppFjG3 #ISS #webcam

To all hoopy froods who know where their towel is: Happy Towel Day! Note this one is special: 25+5+12=42! http://t.co/0JZRs86C #towelday

Great movie of shuttle launch yesterday: http://bit.ly/l5Tbga Turn up volume and see it punch thru the clouds! #sts134 RT @michielb

Try landing a space shuttle yourself - with this iPhone app: http://www.f-sim.com Shows how hard it is. Very cool :) thx @adam_horn

Excellent pics by @declanfleming: last night's ISS pass shots over Bristol http://flic.kr/p/9oqfLw

Very cool new website: http://www.solarsystemscope.com #planets #astronomy

Sorry ISS watchers, no space station alerts today. Twitter is suspending my accounts the moment I use them to send tweets.

amazing animation of the known universe and our tiny planet in it: http://bit.ly/4tPpuO - watch it fullscreen and in HD! RT @kejames

This is what happens to the astronauts when the ISS accelerates into a higher orbit: http://t.co/VKSqTyWf :-) #NASA

RT @carolune: Very, very cool! Scale of the Universe: ixt.gs/ySsKsQ (via @datavis)

Amazing images of Aurora Borealis, live from Sweden: http://t.co/FutgPZhm (via @virtualastro)

Wow. Amazing timelapse video made of pictures taken from the ISS: http://t.co/2Dd0rUSv #ISS #NASA (thx @firesphere)

Weekend project: build your own paper model of the ISS :-) http://t.co/sMpUcz1 More: http://t.co/xgr2a7K

Space station #ISS gets in the way of astrophotographer's shot of a nebula: http://t.co/SRiiWZb Beautiful! RT @govertschilling

Beautiful time-lapse video made of photos taken from the #ISS: http://t.co/dRGfKoof Watch it in full screen!

spectacular: actually *see* Atlas V rocket break the sound barrier! http://bit.ly/c8SIcj (via @2525 & @badastronomer)