Astronomy and Astrophysics Forum

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Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
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Our Beautiful Universe - Photos and Videos
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Stargazing How Can You Improve Your Amateur Solar Imaging Techniques?
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54K
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Insights Planning to buy a first telescope? - Comments
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Astronomy and Cosmology FAQ List
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Undergrad Practical cosmic speed limit for macroscopic objects?
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377
Undergrad How our Moon and Sun may affect Earth's equatorial bulge
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317
Undergrad Luminous Fast Blue Optical Transients (LFBOTs)
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Undergrad Question of accuracy of galactic collision simulations
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High School Is it a meteor or a meteorite when it makes moonfall?
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366
Undergrad Rotation curve in spiral galaxy velocity and uniform velocity dispersion
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High School Lunar Orbit Issues & Lunar Clocks
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Stargazing Solar Activity and Space Weather Update thread
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High School NASA Data Site Down
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5
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736
High School Looking for info about the Sombrero Galaxy
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10
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865
Undergrad Could Venus be a 'Soot World'?
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Undergrad Is there anything inside a black hole?
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The James Webb Space Telescope
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High School 3I/ATLAS, Interstellar Comet
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Undergrad Population 3 star (Pop III) candidate LAP1
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Rock on Mars possibly indicating Life
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High School Help with the protocol for accurately recording an orbit for the IAU
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Graduate Project Progress Report and possible Radio Astronomy Technique?
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952
High School Star like object travels in a zigzagging pattern relative to other stars
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Undergrad Visible light Over Large Distances
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Undergrad How feasible is home radio astronomy?
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Stargazing Castor, Pollux, Mars and the Moon
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Stargazing Partial Solar Eclipse, From Southern New Zealand
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High School Asteroid 2024 YR4 has a 1% risk of a multi-megaton impact in 2032 (now ruled out)
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High School Venus and Jupiter Conjunction
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Undergrad Potential biosignature found in Mars rock
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Does it make sense to build new radio telescopes?
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Graduate Could gamma-ray bursts have an intragalactic origin?
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Stargazing Orange lines on Aladin lite
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Graduate Why do both poles of a radio pulsar emit radio waves?
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Undergrad Could fast radio bursts be alien radar signals?
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High School Looking for a list of astronomy collaborations
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High School Does Time Pass at Different Rates on Other Planets?
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Graduate Self-gravitating systems and MOND
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Undergrad How to explain the strange pulsar in the Crab Nebula?
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Undergrad Why are continuously emitting radio pulsars not detected?
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Undergrad Time interval terminology
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Graduate Charge to mass ratio of a photon
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High School Simulating the Universe's First Stars - The Population III Stars
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High School Feasibility of Sending a Radio Signal Detectable from a Neighboring Star
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High School How Can Interstellar Asteroids Be Analyzed Using Orbital Mechanics Equations?
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Undergrad How Does the Balloon Analogy Explain the Expansion of the Universe?
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Undergrad Sun gravitational lensing forces
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High School Where can I find easy-to-understand GAIA exoplanet data?
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Undergrad Large Synoptic Survey Telescope -> Vera C. Rubin Observatory
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High School Sun's peak wavelengths and chlorophyll's green colour
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Graduate Understanding the Gravitational Redshift Caused by a Black Hole
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High School How well do we understand the formation of population III stars?
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Undergrad Questions on Expansion of the Universe and Newtonian Physics
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High School Strange spiral structure in Oort Cloud, outer Solar System
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Undergrad How 'Messy' are Fusion Reaction Chains in Stars?
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High School Strongest hints yet of biological activity outside the solar system
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Undergrad Help with my Polar Aligning Star Tracker please
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Undergrad IRAF 2025?
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Undergrad If We Crack the Neutron Star Equation of State, How Will It Change Our Daily Lives?
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High School Colliding Gas Cloud to form a Star
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Undergrad Gravitational wave effects on different materials
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How Can I Enhance My Deep Sky Images and Identify Celestial Objects?
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High School What has space exploration done for me as an individual?
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Stargazing Small angle lunar haloes
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Graduate Did scientists just find that the Universe has finite angular momentum?
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High School Confusion regarding black hole spin
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Undergrad Mass Loss on an HR diagram
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Undergrad Magnitude where the Pale Dot is blue?
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Graduate Classifying Milky Way planets by what they´re bound to and originate from
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Undergrad Galaxy GNZ11 33 billion light-years away
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High School First ever recorded planetary engulfment
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High School Does Sun cross planes of all binary stars?
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Stargazing Q: Meridian flip
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High School What is dark matter?
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High School Is the Gaia Telescope's Shutdown Impacting Our Ability to Map the Milky Way?
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Undergrad Why Do Nebulae only have Hydrogen, Oxygen and Sulfur?
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Undergrad Confused about Stonyhurst Grid and jHelioViewer
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Undergrad How can the Universe be infinite?
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Undergrad Speediest Exoplanet System
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High School How Can Black Holes Vary in Size if They Are Singularities?
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High School CNO Cycle
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Undergrad Can Staging Rockets Achieve Faster-Than-Light Travel Despite Relativity?
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Measuring the Solar System and Universe
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High School Possible explanations for meteor like observations?
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Undergrad The initial density of an object and its compression into a black hole
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High School I Need Help on Understanding Some Basic Astrophysics / Sand Clock Universe
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Undergrad Would discovery of a galaxy without dark matter disprove MOND?
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Undergrad Cosmic ray origins
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Stargazing Is There a New Planet Beyond Neptune?
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Stargazing Merger of two black holes (video)
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High School Brightness of different layers of the Sun
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Graduate Understanding NOAA and Naval Observatory's Solar Calculations
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High School Atmospheric refraction and "rainbow"
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Undergrad How big a lunar radio telescope to detect Earth-like signals?
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High School Question: Orbital mechanics of a binary star system
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Stargazing Meteorite crash recorded on video in Canada
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High School More scope refurbishments or start new?
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Stargazing How Did You Capture the Mars Occultation? Share Your Photos Here!
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Undergrad Nature paper on Moon's initial evolution - Tidally driven remelting
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Undergrad The Heavier Elements: A Question About Their Abundance
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Undergrad Moon phase ruins my Stargazing!
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High School Help w/ repairing/refurbishing an equatorial mount
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High School Does my theory about black holes make sense ?
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Undergrad Expansion of a star to become a red giant
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