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.
High School Mass transfer between neutron stars in a binary pair
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Undergrad How do gravitational waves differ from the expansion of the Universe?
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Undergrad Why do gravitational waves travel at the speed of light?
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Undergrad Bias and dark current from a graph of mean signal vs exposure time
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Undergrad Composition of Jupiter: Ices, Cores & Outer Gas Layers
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Undergrad The definition of volume inside black hole?
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High School Stars massive enough to evolve into black holes
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High School Name of projection to firmamentum (celestial sphere)
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High School Navigating To Another Star System
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Graduate COG calculation of diffracted spots on a camera
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Graduate Can Background Radiation Serve as a New Coordinate System in Astronomy?
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Undergrad Stromgren photometric data in Vizier
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Undergrad Simulation debugging for Apollo Lunar Landing
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Undergrad Encircled energy for different aperture shapes (circle, triangle, square)
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High School Question re Webb telescope at L2
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High School Visit to Hayden Planaterium -- The projector is gone?
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Undergrad Issue with Stellarium: transit of Venus (find the parallax)
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Stargazing Better than Mars Colonization in many aspects.
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Stargazing Star appearing to move ping pong like rapidly
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Graduate Obtaining the noise level of a camera
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Undergrad Confused about declination, elevation & altitude
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Stargazing Does an Analemma visualize the Earth's actual orbit around the sun?
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High School Radiation Levels at Earth's Poles
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Undergrad Collision between the Milky Way and Andromeda and Redshift
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Stargazing Troubleshooting My Orion 130 Reflector
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High School Acceleration of time due to entropy
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Undergrad About the relation between number of sidereal and solar days
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High School How long it takes the Earth to fall halfway to the Sun--ellipse method
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High School Delta-v from Lagrange points to lunar surface?
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Undergrad Assumptions for blackbody spectra vs. emission spectra vs. absorption spectra
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Stargazing Calculating the Resolving power of a Telescope
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High School Is there a way of creating placemarks in Stellarium?
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Graduate Analemma layout and proportions on a sundial
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Undergrad Newton's 3rd law and ether in space
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High School Question about the solar system and gravitational forces
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Undergrad Planetary Formation: Could Collisions Explain Our Solar System?
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High School Pressure under the ice of Europa?
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Undergrad What Are These Mysterious Objects Spotted Near Orion?
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Undergrad Evidence for existence of a 9th Planet in the solar system
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Undergrad Is the existence of a Dyson Sphere impossible?
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Undergrad Dark matter + gravity is 'right', or our understanding of gravity is wrong?
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Undergrad Could Titan Be Our Next Home for Colonization?
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Undergrad Is Dark Matter Composed of Low-Mass Particles?
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Undergrad Orbital distance increase during the white dwarf phase of the Sun
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High School Definition of Stellar Parallax from Alonso and Finn Volume 1
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Undergrad Black holes and relation to creation
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High School How Sensitive Must SETI Arrays Be to Detect Extraterrestrial Signals?
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Undergrad N-body simulation of high or low-mass dark matter particles
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Undergrad Dark Sky Parks -- coming to a park near you
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Graduate Radius of the Sun: Can We Accurately Predict It Through Theoretical Models?
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High School Some visuals for Size of Solar System, Galaxy, Universe
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Undergrad (See image) At what distance does the temperature of the Corona decline?
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Graduate Single photon avalanche detector (SPAD) difficulties with photometer
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Undergrad Granules On The Sun: Photosphere Or Convection Zone?
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Undergrad Are orbital resonances constructive or destructive?
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High School Observing Orbital Mechanics from the 2nd Focus of Earth's Orbit
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Undergrad Magnetism and Gravity Discussion/Questions
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High School Why was the Sun's output not as intense in the past?
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Undergrad Finding Exoplanets: How Astronomers Do It
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High School How can we watch BHs collide in a finite time?
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High School Star visible for longest time from Earth
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Stargazing Is the Hubble Space Telescope Dead?
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Graduate How do we differentiate the K-corona from the F-corona?
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Graduate How Can I Filter Known Globular Clusters in SDSS Data?
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Graduate NASA’s InSight Mission Reveals Internal Structure of Mars
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High School Do emission nebula glow because of ionised or excited electrons?
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Undergrad Red-Shifting vs. Luminosity Question
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High School Sun-Earth Encounter: Acceleration, Roche Limit, Rotation & More
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Stargazing Could Elon Musk's Starlink orbitals piggyback telescopes?
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High School The Impact of Tidal Force on a Star's Magnetic Field and Supernova
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High School Does Gravitational Time Dilation Affect the Speed of Light in Outer Space?
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High School Biggest asteroid to pass Earth in 2021
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Undergrad Rotation curve with neutral hydrogen and dark matter
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High School Betelgeuse unusual dimming - what's up?
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High School Light Leaving Earth-Observer's View of Events in Time
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Undergrad Why are emission spectra of stars rarely shown?
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High School Why can we only see one side of the moon?
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Undergrad What is the average annual accumulation of cosmic dust on Earth?
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High School Looking for Simulations of Exoplanets
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Undergrad If Jupiter had a 5th large moon until "recently", would we know?
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Undergrad Andromeda vs. Milky Way galaxies
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Undergrad What is theoretically the heaviest isotope that the R-process could produce?
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Undergrad Planetary orbits - the 2-body problem
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High School Seeing a half Moon - where is the Sun?
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Stargazing Lightning ball - me to analyze this rare video
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Undergrad FRBs (Fast Radio Bursts) -- New clues of their location and origin
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High School Could an Extraterrestrial Object Near Earth Disrupt Satellites?
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Stargazing Macroscopic Dark Matter Revealed By Lightning
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Undergrad Freshly Made Plutonium From Outer Space Found On Ocean Floor
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Insights Do Black Holes Really Exist? - Comments
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Undergrad How fast must Voyager travel to leave the solar system?
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High School Why Do We See Darkness in a Universe Full of Stars?
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Graduate Question about extragalactic stellar motion
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Undergrad Are some cosmic rays iron nuclei?
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Undergrad What happens to the material not involved in the core collapse of a supernova?
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High School Vertical lift question (Lift a roof from beneath with limited space)
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High School Mass and Surface Gravity of a Dyson Sphere
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Stargazing Roberto's Indonesian Punggur Meteorite: My 2021 Collection Addition
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Undergrad Quantum Astronomy - well sort-of
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High School How Do Black Hole Animations Capture Optical Effects?
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