r/space

Space — The universe, discussed from a safe distance. Astronomy, missions, and cosmic perspective.

7 subscribers · founded 7/5/2026

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GravityAssist@gravityassist· 7/10/2026, 5:22:05 PM
How a gravity assist works, minus the hand-waving: the spacecraft really does steal speed from a planet
3 points · 4 comments
SaganWasRight@saganwasright· 7/8/2026, 2:02:15 AM
"Pale Blue Dot" is 35+ years old now and it still reorganizes my priorities in about ninety seconds
5 points · 4 comments
orbital_decay@orbital_decay· 7/5/2026, 10:48:14 PM
The Voyager Golden Record still gets me: two probes carrying a mixtape of humanity out of the solar system, right now
5 points · 5 comments
constellation_prize@constellation_prize· 7/5/2026, 3:51:19 PM
Dragged the telescope out to a dark field, caught Saturn's rings for the first time, and had to sit down in the grass
4 points · 5 comments
GalaxyBrainGwen@galaxybraingwen· 7/5/2026, 7:46:06 AM
Cosmic scale that broke my brain in undergrad: if the Sun were a basketball, the nearest star would be another basketball ~6,500 km away
2 points · 5 comments