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.
Stargazing Why does the asteroid Dimorphos leave a trail after impact?
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Undergrad What are the possible states of cold iron balls?
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Undergrad Orbital Velocities and Mass Distribution in Galaxies
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Graduate Interactive Galactic Dynamics Textbook -- Bovy 2022
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Graduate What is the cause of lunar nodal and apsidal precession?
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High School Can gravitational force have influence on objects at infinitely long distances?
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Undergrad Would it be possible for a black hole to have a "solar system"?
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High School Elbert Another Forgotten Woman who helped advance Science
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High School Distance of Stars / Size of the Universe calculation
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Undergrad Could Passing Asteroids Alter Milanković Cycles and Trigger Climate Change?
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Undergrad Do All Galaxies with Dark Matter Halos Have Flat Rotation Curves?
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High School What Could Explain the Mysterious Beam of Plasma Seen in the Sky in 2017?
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High School Why does the moon appear tilted?
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High School How's it possible that 70% of Earth receives sunlight simultaneously
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High School Degeneracy Pressure: Pauli Principle & Neutron Stars
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High School Hexagonal Craters: Airless Worlds & Moons Explored
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High School How Has the Calculation of Solar System Body SGPs Evolved Over Time?
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High School Why are impact craters predominantly circular?
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Undergrad Identification of matter and dark matter proportions
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Undergrad Interpreting solar event flux units
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High School Time Dimensions: Astronomy & Beyond
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High School So what's your go-to method to locate M31 (Andromeda Galaxy)?
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High School Nodal Precession: Satellites Orbiting Earth Explained
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Stargazing Fixing declination runaway on a Meade LX200 telescope
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High School Spatial Expansion -- Coincidence?
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High School What would the planets look like in real life?
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Undergrad How accurate is the distance to M4 and its stars according to different sources?
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High School Amazing Rings: Intersecting Stars Create Spectacular Gas Rings
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High School The value of the standard acceleration due to Earth's gravity
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Undergrad What is the temperature dependence of the NIRCam sensor's responsivity?
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Graduate A pair of interesting papers: have counterarguments been published?
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High School Could a black hole just be a planet?
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High School Celestial mechanics: Why is my planet orbiting faster and faster?
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Undergrad Upper limit of relativistic spin?
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Undergrad Can we see light pollution from space?
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Undergrad Does all infrared get detected as heat?
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High School What does relativity say about wormholes?
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Undergrad Gas Density of Lunar Crater Rims: Comet vs. Asteroid Impacts
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Undergrad Question about the William Herschel Telescope's new "Weave" device
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Undergrad Help me on the timeline of star formation in the early Universe
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Stargazing How can we see the ISS at 200 miles away with the naked eye?
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Undergrad Voyager I and Voyager II informative video
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Undergrad Starlink and gaining energy from orbiting
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Undergrad Could a bubble shield at L1 combat global warming?
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High School Effect of JWST mirror damage on final images
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Undergrad What do high-mass X-ray binaries, or HMXBs, tell us?
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Undergrad How to calculate an unknown planet's orbital period?
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Undergrad Solar system simulation errors
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Undergrad Help with Sunrise & Sunset formulas please
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Undergrad Amount of black hole entropy inside the Universe?
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High School Question about deep space pictures
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Undergrad What is the density of the Carina Nebula?
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Undergrad Is the eccentricity of the lunar orbit constant?
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Undergrad Confused by this armillary sphere in Australia
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Undergrad Mass distribution in a celestial system
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Undergrad Earth's orbit not perfect ellipse
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Undergrad SpaceX says 5G expansion would make Starlink 'unusable' for most Americans
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Graduate From polar coordinates to heliocentric ecliptic coordinates
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High School Can nuclear bomb(s) change trajectory of small black hole?
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High School SOFIA IR Observatory in the Southern Sky
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Undergrad Why are Saturn's rings in its equatorial plane?
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High School Mars Probe gets Windows 98 Update, after 19 years
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High School Where can I find information about Population III stars?
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High School Is it possible for a giant star to have a black hole inside it?
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Undergrad The gravitational center of the Earth
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Undergrad How to find RAAN and argument of perigee for a satellite?
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High School How often do you re-acquire dark and bias frames?
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High School Is Stellina the Ultimate Telescope for Amateur Astronomers?
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Undergrad Voyager Spacecraft beginning to Power Down
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High School Where Can I Find Accurate Planetary Event Data for an Astronomy Course?
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High School Has there been no update to Allen's Astrophysical Quantities since 1999?
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High School Evolution of planetary system around a white dwarf
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Undergrad What is a typical mass density for inter-galactic gas in a cluster?
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Graduate What is a Bern model in planetary population synthesis?
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High School Sun contains more oxygen, silicon and neon than previously thought
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Undergrad Lateral offset from a centered star as measured at the focal plane
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Undergrad Magnetar Mystery: How Do Neutrons Generate a Magnetic Field?
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High School Derivation for Aphelion and Perihelion Distances
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Undergrad What is the current status of Voyager 1's attitude and control system?
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Undergrad How to use astronomical spectra?
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Undergrad European Southern Observatory (Event Horizon Project team) – picture of Sgr A*
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High School What day/exact time does Sun start to move again? (1980 Winter Solstice)
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Undergrad What happens first -- Sun Red Giant or Andromeda collision?
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Undergrad Dawn dead in Ceres orbit, ran out of fuel Oct 2018
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High School Scope Eyepiece diameter for old eyes
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High School Event Horizon Telescope, Milky Way supermassive black hole stream
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High School Which Way Do Planets in Our Galaxy Spin?
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High School Our Sun's position in the Milky Way Galaxy
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High School How does the Milky Way galaxy move in the local Group?
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High School Accelerating to a stop in the Milky Way Galaxy
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Stargazing Planetary Lineup and Eclipse Viewing Tips for Cruise Ship Passengers
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Stargazing Size of Star Images: Electronic Effect, Feynman Paths, or Daft Question?
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Undergrad Do gravitons interact with gravitons?
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High School Would like to explore the Henry Draper catalogue of stars
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Undergrad A busy and interesting night sky in Mackinaw City
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High School Mini spacecraft to Alpha Centauri
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Undergrad What Prevents Electrons from Expanding Radially in White Dwarfs?
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High School First Interstellar Asteroid Found
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Undergrad First Interstellar Object to Hit Earth
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Undergrad Gravitational Field with Dark Energy: Observable Effects?
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