- The case for NROL-22 being a Relay Satellite (MH370 Investigation) https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2006-027A#:~:text=TWINS%20is%20a%20stereo%20mission,regions%20of%20the%20Earth's%20magnetosphere 6 comments aliens
- Sputnik Information/Data at NSSDC Sounds of Sputnik (NASA History Office WAV file) https://nssdc.gsfc.nasa.gov/sound/sputnik.wav 2 comments space
- In 1971-72, Mariner 9 photographed ~80% of Mars’ surface from orbit, revealing ancient river beds, craters, extinct volcanoes, canyons, layered polar deposits, wind-driven sediments, weather fronts, ice clouds, dust storms & fogs. It renewed hope of past life on Mars. It’s still orbiting Mars today. https://nssdc.gsfc.nasa.gov/planetary/mars/mariner.html 3 comments space
- In 1957, people didn't actually see Sputnik I orbiting the Earth, but rather the final stage of the Sputnik rocket that carried the satellite to space. https://nssdc.gsfc.nasa.gov/nmc/spacecraftdisplay.do?id=1957-001a 5 comments space
- Titan's surface, captured by Huygens probe. https://nssdc.gsfc.nasa.gov/planetary/titan/huygens_titan_04.jpg 13 comments space
- Enhanced color view of Saturn's ring system was assembled from clear, orange and ultraviolet frames from a distance of 8.9 million kilometers (5.5 million miles) by Voyager 2 in 1981. The difference in color is attributable to chemical and physical variations. http://nssdc.gsfc.nasa.gov/image/planetary/saturn/saturn_rings_false.jpg 215 comments space
- Titan's Surface [250x400] http://nssdc.gsfc.nasa.gov/planetary/titan/huygens_titan_04.jpg 32 comments space
- Some of the sounds recorded by Huygens' microphone during its descent towards Titan's surface http://nssdc.gsfc.nasa.gov/planetary/titan/huygens_alien_winds_descent.mp3 6 comments space
- Why is the orbit of the Moon not fixed relative to the Earth? http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html 13 comments askscience
- The first image from the surface of the Moon, taken by the Soviet Luna 9 probe. http://nssdc.gsfc.nasa.gov/planetary/lunar/luna9close_big.gif 15 comments space
- 50 years ago, as of this day, Mariner 4 spacecraft was launched to make the first successful flyby of the planet Mars, returning the first pictures of the martian surface http://nssdc.gsfc.nasa.gov/nmc/mastercatalog.do?sc=1964-077a 14 comments space
- Where can I find the orbital parameters of Mars spacecraft? http://nssdc.gsfc.nasa.gov/nmc/spacecraftOrbit.do?id=1971-045A 5 comments space
- Is there a maximum ratio of planet:moon mass? http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html 3 comments askscience
- Messenger has found water on Mercury http://nssdc.gsfc.nasa.gov/planetary/ice/ice_mercury.html 6 comments science
- How were these pictures of Sojourner taken? Are they just artful edits by NASA? http://nssdc.gsfc.nasa.gov/planetary/marspath_images_bw.html 5 comments space
- Nasa sent seeds of trees to the moon and back. Most of them germinated successfully, but no list was ever kept nor any systematic tracking made of the disposition of all the trees. Nasa is now trying to find them again. http://nssdc.gsfc.nasa.gov/planetary/lunar/moon_tree.html 17 comments science
- Solar System family portrait, shot by Voyager 2 http://nssdc.gsfc.nasa.gov/image/planetary/solar_system/family_portraits.jpg 3 comments space
- Mars 3 Lander: Long before Curiosity, this little probe got the job done (relatively) first. http://nssdc.gsfc.nasa.gov/nmc/spacecraftdisplay.do?id=1971-049f 3 comments space
- Why can't we find stars in the background of Earth's photographs from space? http://nssdc.gsfc.nasa.gov/image/planetary/earth/apollo08_earthrise.jpg 23 comments askscience
- Gemini, the forgotten space program, in which American astronauts did their first space walks. Must have taken balls of steel just to ride in those capsules, let alone float on a tether in the middle of a whole lot of nothing. http://nssdc.gsfc.nasa.gov/planetary/gemini_4_eva.html 17 comments space
- Dear IMAX: I will pay $100 a ticket if you make a movie out of a mars/moon landing or flight past the outer planets. Make it happen. http://nssdc.gsfc.nasa.gov/image/planetary/mars/vikinglander1-1.jpg 4 comments reddit.com
- LCROSS wasn't the first time we bombed the moon: The Saturn V's third stage was crashed into it 5 times during Apollo http://nssdc.gsfc.nasa.gov/planetary/lunar/apollo_impact.html 4 comments science
- Ice on Europa - How do we know Europa's surface is made of ice? http://nssdc.gsfc.nasa.gov/planetary/ice/ice_europa.html 9 comments science
- Hammer and Feather Dropped on the Moon, the Feather is lighter than a Pen http://nssdc.gsfc.nasa.gov/planetary/image/featherdrop_sound.mov 4 comments science