Astronomy, Astrophysics, Cosmology Forum

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Join in expert discussion on the topics of Astronomy, astrophysics and cosmology. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
Undergrad Is the expansion of the universe affecting time or just space?
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Undergrad Mass measurement of galaxies with non-gravitational means
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Graduate Has anyone read this new paper on extending the BGV?
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High School Beware of "truthiness" in astronomy in seemingly reliable websites
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Undergrad Which one is Antares in this photo?
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High School History of Cosmology: 1915-1929 | Einstein, Hubble & GR
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Graduate Evolution of radio sources mimics a non-expanding universe
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Undergrad Distinguishing between the effects of dark matter and MOND
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Undergrad Release of trapped light during supernova
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Undergrad New research puts age of the Universe at 26.7 billion years
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High School The Sun's Influence on the Moon's Orbit: Is it Negligible?
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Undergrad I need some support, please, for a gravity assist analysis
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Undergrad Circular polarization and linear polarization of pulsars
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Undergrad Spectral class temperature range
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Undergrad Velocity of a given planet relative to the Galactic Center
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Undergrad Is anything not spinning in the Universe?
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High School Age of Universe: Big Bang, Braneworlds & Perspective
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High School The fastest spinning and possibly the youngest magnetar known
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Undergrad NANOGrav results on Thursday (June 29)
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Undergrad What is theorized to be the coldest white dwarf in the Universe?
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Undergrad Solar internet problems in 2025?
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High School Cosmological time dilation of high-redshift quasars
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Stargazing Inquiry Regarding Hypothetical Faster-Than-Light Travel Scenario
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Graduate Help with IPTA Gravitational Waveforms Detected
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High School Expanding Universe -- What is it expanding into?
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Undergrad Testing for dark energy using the Local Group
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Undergrad Oblate Ellipsoid: Can Earth Be Modified?
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Undergrad How to find Heliocentric latitude data for each planet?
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Undergrad Thoughts on this article: The Universe Is More in Our Hands Than Ever Before
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High School Questions about Supermassive stars in the Milky Way Galaxy
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Undergrad Could it be that the Big Bang had no cause?
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Undergrad Any evidence of white holes in the Universe?
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Undergrad Is there any way in the future to determine the Universe's size?
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Undergrad How is there any pressure at all in isotropic radiation?
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Graduate Mass density of radiation in Friedmann equation?
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High School Has Earth Lost Its Status as a Planet?
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Undergrad Star with quadrupole in a binary system violates Newton's 3rd Law?
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High School What is a parsec and how is it measured?
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Undergrad Measuring the Velocities of Astronomical Objects in the Milky Way
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Undergrad What keeps dark matter in galactic halos?
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High School Glimpsing Orion's Setting in the Western Sky
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Undergrad Comet Bernardinelli-Bernstein enters inner solar system
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Undergrad Early Catalog of Planet-Hosting Multiple Star (≥ 3) Systems
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Undergrad Gravity inside an exponential mass disk
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High School Is the Universe's age 13.7B years in a particular frame?
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High School Saturn's 145 Moons: The Latest Discoveries and What Sets Them Apart
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Undergrad What are the conditions under which stars can radiate coherent light?
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Stargazing Asteroid filmed over the English Channel
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Undergrad Developing Inflation Theory w/o Dark Energy: Alan Guth 1980
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High School When Would Planets Go Dark if the Sun Went Out?
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High School What caused the recent supernova in the Pinwheel Galaxy?
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Undergrad Discovering the Truth About Antares: From Young Red Supergiant to Blue Giant
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High School How can the Universe be flat? Ridiculous
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Undergrad Is Penrose's Cyclic Cosmology Model Only Applicable on a Local Scale?
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High School How does gravity's warping of spacetime appear first among the forces?
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Undergrad Where can I find publicly accessible data from observatories in Europe?
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High School At what distance would a Venus-like planet have a HZ temperature?
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Undergrad The curvature and size of the Universe
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High School Night Sky of Alpha Centauri: Sol as a Bright Star
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High School How bright is the Sun compared to the sky?
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Graduate Updated Hubble constant from TRGB measurements
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High School What Would Happen to the Elements in the Human Body If Teleported to the Sun?
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Graduate Is M_{Pl} the Planck mass or the reduced Planck mass?
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High School What's a good website for aurora forecasts?
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Undergrad Was Electroweak Symmetry Breaking in the Early Universe Controversial?
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Undergrad Topological phase transitions for the whole Universe...?
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Undergrad What Could Cause the Earth's Rotation to Dramatically Slow Down?
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High School Ken's Constellation Query: Viewing Same Constellation in AUS & SA
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High School Celestial objects in the very far future
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Undergrad Calculating Proportional Luminosity of Fictitious Star
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Undergrad Runaway supermassive black hole?
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Undergrad Is the light from Andromeda truly blue shifted?
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Stargazing Huge daytime fireball over Israel earlier today
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Undergrad CMBR Evidence for Non-Baryonic Dark Matter
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High School Exoplanet TOI-4603 b, ~13x Jupiter mass, ~1.04 Jupiter diameter
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Undergrad Models where all symmetries would be approximate?
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High School Images with CMB used to Illuminate Dark Matter
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High School Which statement is more accurate? (Hubble's redshift vs. Hubble's law)
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Graduate Black hole mass coupled to expansion -- astrophysical source of dark energy?
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Graduate Please express this theory of mine mathematically or through equations
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High School Ultramassive Black Hole (UMB), 30 billion solar masses?
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High School Are the stars that we see in constellations within the Milky Way galaxy?
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Graduate Scalar Field Dynamics in Inflation
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Graduate New paper claims there is evidence of suppression of structure growth
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High School Circumgalactic Black hole imaged by the Hubble Space Telescope
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High School AI Enhanced image of M87 black hole
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High School Discover Jupiter's Mysteries with James Webb Space Telescope
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High School How many astronomers use JWST data?
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Undergrad Research on conservation of spacetime curvature
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Undergrad Estimating Hot & Cold Spots in CMB Sky Maps
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Graduate Is there a way to convert distance modulus to get H(z) values
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Undergrad Non-homogeneous and anisotropic metric and laws of physics...?
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High School Subatomic particles and dark matter
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High School Vulpecula, pulsars and neutron stars
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High School B-Modes in CMB Polarization - any change since BICEP2 in 2015?
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Graduate As stars contract, why does total entropy rise?
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High School Why do people not notice the equinox when it happens?
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Undergrad Do supernovae generate neutrinos or antineutrinos?
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Undergrad How Does μ¨ Based Cosmology Impact Our Understanding of Galaxy Evolution?
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Undergrad If GRB-221009A had been in Milky Way, would we have been fried?
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