Astronomy, Astrophysics, Cosmology Forum

High School Possible explanations for meteor like observations?

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Undergrad Early large galaxy studies

Undergrad The initial density of an object and its compression into a black hole

High School I Need Help on Understanding Some Basic Astrophysics / Sand Clock Universe

Undergrad Would discovery of a galaxy without dark matter disprove MOND?

Undergrad Cosmic ray origins

Stargazing Is There a New Planet Beyond Neptune?

Undergrad Question about Tong's cosmology lecture notes eqn. 1.19

Stargazing Merger of two black holes (video)

High School Brightness of different layers of the Sun

Graduate Understanding NOAA and Naval Observatory's Solar Calculations

High School Atmospheric refraction and "rainbow"

High School Analogue Black Holes: Disposal?

Undergrad How big a lunar radio telescope to detect Earth-like signals?

High School Question: Orbital mechanics of a binary star system

Stargazing Meteorite crash recorded on video in Canada

Undergrad What affects light near black holes and stars?

High School How do we know if a distant galaxy is matter or anti-matter?

High School More scope refurbishments or start new?

Stargazing How Did You Capture the Mars Occultation? Share Your Photos Here!

Undergrad Nature paper on Moon's initial evolution - Tidally driven remelting

Undergrad The Heavier Elements: A Question About Their Abundance

Undergrad Moon phase ruins my Stargazing!

High School Help w/ repairing/refurbishing an equatorial mount

Undergrad Expansion of a star to become a red giant

High School Considering a budget observatory

Graduate Is there a stretching of the light curves of supernovae 1a?

Undergrad 3 questions about a paper on density fluctuations in the Universe

Undergrad How to graph Earth's path?

Undergrad Possibility of multiple planets sharing the same orbit?

High School Popular physics - The Nebra disk

High School Can a thunderstorm affect a satellite in low earth orbit?

Undergrad Is this the correct representation for showing the direction of a star on CMD?

Graduate Where to find black hole datasets

Graduate Spectral Data Availibility

Graduate Interpretation of an anticorrelation between 𝐻0 and log10(𝜔𝐵𝐷)

Stargazing Is My Heavy, Slightly Magnetic Rock with Green Glass Particles a Meteorite?

Undergrad Does light bend around black holes?

Undergrad The Boundary of the Observable Universe

High School Predicting frequency of Earthlike planets and systems

Undergrad How would the laws of thermodynamics change in a contracting universe?

Undergrad New Developments In The Search For Planet X

High School Looking for Axions in Neutron Stars

Undergrad Right ascension and Declination calculations

Undergrad Why do we still see the CMB today?

Graduate Black hole thermodynamics and accelerated expansion

Undergrad The brightness and linear polarization of pulsars

Undergrad Two-dimensional negative curvature space

High School Redshifts of nearby galaxies

High School Optimizing Exposure Times: Balancing Efficiency and Image Quality

High School Strange cosmic particles in my detector

High School Variation of Apparent Luminosity with Distance

High School The Earth is upgrading with a second moon

Undergrad Distance at redshift z=0.666

High School Galactic Sheets and Voids

Undergrad Bose-Einstein and Fermionic condensates in space?

High School Asteroid 2024 RW1 - entered Earth's atmosphere over Luzon, Philippines

Undergrad What if the early expansion of the Universe was not so rapid?

Undergrad Does the amount of hidden mass remain constant?

Undergrad Rotation curve of a gas disk in an elliptical galaxy

Graduate Looking for information about spectroscopy isotopes and stellar formation

High School Questions about a paper on reconciling JWST and HST data

Undergrad How we are in a matter dominated universe (without antimatter annihilation)

Undergrad J0524-0336, surprisingly high Li concentration

Undergrad Can there be free electrons in interstellar gas?

Undergrad Regarding the accuracy of the description of a pulsar in a 1977 paper

Undergrad Wow! signal could be from interstellar hydrogen clouds

Undergrad Comet A117uUD Goes Interstellar after Encountering Saturn in 2022

Undergrad Toward the spectral index in slow roll

Undergrad Density fluctuations in a homogeneous linearly expanding universe?

High School Will we ever communicate with extraterrestial life in a reasonable time frame?

Undergrad What is the reason for density perturbations in the CMB?

Undergrad Question on halos of matter made from massive and stable particles?

High School Temperature difference between Venus and Mercury

High School Asteroid Dimorphous easier to move because it's made up of rubble?

Graduate N-Body inputs from Keplerian Orbits

Graduate Celestial objects - older than the CMB

High School Matter/Anti-Matter in a Vacuum

Undergrad What Factors Create the Windiest Exoplanets?