r/astrophysics

19K archived posts · Feb 2010 – Sep 2026

Astrophysics: the science of space

r/astrophysics

The branch of astronomy concerned with the physical nature of stars and other celestial bodies, and the application of the laws and theories of physics to the interpretation of astronomical observations.

Created Jan 16, 2010

102KMembers (last snapshot)

19KArchived posts

##Welcome to r/astrophysics!

This subreddit is for posts relating to Astrophysics and any branches of that study.

Please forgive us for that little "going out" earlier. We're back and working toward being fully functional now. Thanks for sticking with us!

For career questions, check out this guide by an astronomer and our wiki.

###News & Media:

•Universe Today

•Space.com

Academic publications can be found at arXiv:astro-ph.

Recommended reading is available in the wiki.

Also be sure to check out other related subreddits:

r/science • r/AskScience • r/AskScienceDiscussion

###Physics:

r/physics • r/ParticlePhysics • r/NeutronPhysics

###Astro:

r/space • r/Astronomy • r/askAstronomy • r/Cosmology • r/Cosmos • r/milkyway • r/Solar_System • r/solarsystem

###Stars:

r/blackhole • r/blackholes • r/sun

###Planets:

r/Mercury • r/Venus • r/Earth • r/Mars • r/Jupiter • r/Saturn • r/Uranus • r/Neptune • r/exoplanets

###Dwarf Planets:

r/Pluto • r/Ceres • r/Orcus • r/Salacia • r/Haumea • r/Makemake • r/Quaoar • r/Eris • r/Sedna

###Moons:

r/Moon • r/Phobos • r/Deimos • r/Io • r/Europa • r/Ganymede • r/Callisto • r/Mimas • r/Enceladus • r/Tethys • r/Dione • r/Rhea • r/Titan • r/lapetus • r/Phoebe • r/Ariel • r/Umbriel • r/Titania • r/Oberon • r/Triton • r/Charon • r/Dysnomia

###Other Celestial Objects:

r/KuiperBelt • r/OortCloud • r/Asteroid • r/Comets • r/Meteors • r/AsteroidBelt

###Telescopes:

r/telescopes • r/atming • r/binoculars • r/optics

###Photography and Video:

r/Astrophotography • r/landscapeAstro • r/Spaceporn • r/Spacevideos

Looking for Dark Skies?

r/darksky

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