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r/astrophysics

84,984 subscribers
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.

Notice: This subreddit is not actively monitored, so the posts here are only a small subset of what exists on reddit.

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to r/astrophysics by Economy-Macaron-4605
3 months ago
Pulse rockets or nuclear detonator rockets.
to r/astrophysics by Low-Preparation-7219
2 months ago
What’s the biggest bottleneck to astrophysics research?
to r/astrophysics by External-Grade1976
10 months ago
Can a hypothetical QWR star support life on a terraformed planet orbiting in the habitable zone?
to r/astrophysics by External-Grade1976
10 months ago
Could Blue stars that include Neutron stars/pulsars, QWR similar to HD 45166, B-type star slightly less massive than Regulus that experienced a similar mass transfer, and a 20126 kelvin White dwarf star be hypothetically terraformed?
to r/astrophysics by Half-White_Moustache
4 months ago
Can I measure the size and mass of a planet by knowing what its lowest orbit distance?
to r/astrophysics by External-Grade1976
10 months ago
Can two high mass White dwarf stars that orbit each other at a close and stable orbit warm each other and maintain their surface temperature through their light?
to r/astrophysics by ExoGeniVI
7 months ago
Can you blow my mind with a space fact?
to r/astrophysics by External-Grade1976
10 months ago
What affects the surface temperature of the inner accretion disk of a Black hole?
to r/astrophysics by External-Grade1976
10 months ago
How hot would the surface temperature of the inner accretion disk of Ton 618
to r/astrophysics by External-Grade1976
10 months ago
How hot would the surface temperature of the inner accretion disk of Ton 618
to r/astrophysics by External-Grade1976
10 months ago
Quark stars
to r/astrophysics by Accomplished_Fan_880
9 months ago
Early universe light escape
to r/astrophysics by TheOneWeirdo
1 year ago
Could asteroid debris leave the solar system?
to r/astrophysics by louiebuckwheat
3 months ago
Is there any oxygen in space?
to r/astrophysics by Nickbuddha11
4 months ago
What're some tips to getting into astrophysics?
to r/astrophysics by tinderphallus
1 year ago
Will the sun die?
to r/astrophysics by HankHillEnthusiast
1 year ago
Math help for Physics Bachelors
to r/astrophysics by mllhild
1 year ago
Preview thumbnail for What is a good resource on orbital resonances of moons and how to calculate them? image
What is a good resource on orbital resonances of moons and how to calculate them?
to r/astrophysics by mattmattok
1 year ago
*Amateur question • So, the true make up of the entire universe is magnetic waves, or fields-that all particles like the electron are simply globs of energy within these waves or fields-is this correct? Is all matter just globs of energy within magnetic fields?
to r/astrophysics by CuzRedditSaidIt
8 months ago
A question about orbits and relative movement.
to r/astrophysics by catifie
2 months ago
How do I calculate the rotational velocity of a galaxy?
to r/astrophysics by Captain_Nemo_2012
1 year ago
Questions on our Stellar Neighborhood (100 LY Dia of Sol)
to r/astrophysics by EthicalBisexual
1 year ago
Can you have compression waves that propagate through dense areas of stuff but the “stuff” isn’t very structured (structured like rocks, gas, etc)... like particles or photons?
to r/astrophysics by StupendousTurtle
1 year ago
Becoming an Astrophysics
to r/astrophysics by Luminous_Zer0
2 months ago
Preview thumbnail for Nuclear Explosion/Activity at the Center of Black Hole image
Nuclear Explosion/Activity at the Center of Black Hole