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.
Undergrad Separation angle between pulsars detecting Gravitational Waves
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Undergrad Why Does Gravity Remain when Star Mass Dissipates?
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Undergrad Plotting the orbits of the planets from Ephemeris data
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Undergrad Help identifying this Tumbling object in a night sky photo from Namibia
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Undergrad Why Do Stars in Binary Systems Assume a Teardrop Shape?
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Undergrad Can Hawking Radiation Exist If Nothing Escapes a Black Hole?
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Undergrad Could the Universe Be Much Older Than 13.8 Billion Years?
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Undergrad How Does Inverse Bremsstralung Affect Photon Absorption?
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Undergrad Einstein ring and Einstein Cross
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Undergrad How Do Moons Influence the James Webb Telescope's Position at Lagrange Point L2?
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Undergrad What is “absolute circular polarization fraction” for a pulsar?
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Undergrad Why Does NASA Claim 10-100x Better Bandwidth from Optical Communications?
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Undergrad What does the output of a radio telescope look like?
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Undergrad Is Dark Matter the Key to Understanding the Pre-Visible Universe?
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Undergrad Can You Build Your Own Radio Telescope at Home?
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Undergrad Telling time on Iapetus and other general questions about Iapetus
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Undergrad An asteroid the size of the Rose Bowl has a slight chance of impacting Earth?
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Undergrad Solar Calendar -- When was the leap day inserted?
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Undergrad How Can We Measure Properties of Distant Planets and Stars?
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Undergrad Nuclear reactions in the Sun and other topics on stars
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Undergrad Formation of emission lines and other topics
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Undergrad Star cluster in the Milky Way appears to be as old as the Universe
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Undergrad How does gravitational self-interaction affect the Milky Way Galaxy?
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Undergrad Is it possible to build a Telescope the Size of Half the Solar System size using all Lagrange Points?
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Undergrad “Interpreting astronomical spectra” -- Continuum origins
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Undergrad Effects of gravity on planetary core structure
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Undergrad Location of the magnetopause using Chapman-Ferraro equation
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Undergrad Resolution of observation telescopes?
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Undergrad Can astronomical observation take place in daylight in Antacrtica?
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Undergrad Is El Gordo's Collision Velocity Challenging ΛCDM?
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Undergrad Surely the 2nd Law of Thermodynamics is defied by gravity?
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Undergrad Working model to demonstrate Lagrange points L4 & L5 -- possible?
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Undergrad Formation of rocky planets without a star
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Undergrad Formation of jets with accretion disks at black holes
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Undergrad Inquiry Regarding the Determination of the Galactic Disk's Outer Bound
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Undergrad Why Didn't Henrietta Leavitt Sign Her Own Discovery Paper?
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Undergrad Comparing the formation of the atmospheres on Earth vs Venus
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Undergrad Obtaining Transit Spectrum for Celestial Bodies Using JWST NIRSPEC
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Undergrad What is the accuracy of parking spacecraft into Lagrange points?
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Undergrad Longest day of the year is June 21 but longest daylight is June 26?
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Undergrad Anyone know about the bolide across the Gulf Coast Fri July 14, 2023?
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Undergrad Error in Euler angles and quaternions
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Undergrad Without degeneracy, when would Solar cores collapse?
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Undergrad Lines of stars that we see in the sky
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Undergrad Mass measurement of galaxies with non-gravitational means
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Undergrad Which one is Antares in this photo?
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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 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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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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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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Undergrad Any evidence of white holes in the Universe?
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Undergrad How is there any pressure at all in isotropic radiation?
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Undergrad Star with quadrupole in a binary system violates Newton's 3rd Law?
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Undergrad Measuring the Velocities of Astronomical Objects in the Milky Way
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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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Undergrad What are the conditions under which stars can radiate coherent light?
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Undergrad Discovering the Truth About Antares: From Young Red Supergiant to Blue Giant
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Undergrad Where can I find publicly accessible data from observatories in Europe?
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Undergrad Was Electroweak Symmetry Breaking in the Early Universe Controversial?
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Undergrad What Could Cause the Earth's Rotation to Dramatically Slow Down?
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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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Undergrad Do supernovae generate neutrinos or antineutrinos?
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Undergrad If GRB-221009A had been in Milky Way, would we have been fried?
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Undergrad What Can We Learn About Stellar Nucleosynthesis at the NIC-XVII Symposium?
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Undergrad Phase Contrast Telescope - Part II
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Undergrad Angle of Sun by date and zip code?
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Undergrad Oort Cloud and Kuiper Belt: differences
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Undergrad Oort Cloud Dynamics: Interaction, Composition, Hazards
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Undergrad How Long Does Water Ice Take to Sublimate in Space?
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Undergrad Research paper and sources investigating Earth's moons
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Undergrad Do Emission and Absorption Spectra Match? A Non-Physics Minded Tourist's Guide
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Undergrad Estimating Mass of Central Object Using S2's Orbit Motion and Kepler's 3rd Law
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Undergrad What Milky Way stars could go supernova to < +3 at any time?
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Undergrad Is there a difference between an ultracool dwarf and a brown dwarf？
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Undergrad Could Dark Matter Be Stray Exoplanets or Collapsed Stars?
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Undergrad Some reasoning about Alfvén’s frozen-in flux theorem
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Undergrad What is the basic definition and application of the virial theorem?
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Undergrad Cosmic Microwave Background Surveys
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Undergrad Electron-Positron Pair Instability Supernova
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Undergrad What Causes the High Tide on the Antipodal Side of the Earth?
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Undergrad Understanding diagrams of the late stages of stellar evolution
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Undergrad Should I study astronomy first or cosmology first?
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Undergrad What is the difference between collisionless and self-interacting dark matter?
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Undergrad What is the probability of life on exopanet LHS475b?
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Undergrad Lunar Slingshot Maglev: NASA's Energy Savings for Mars & Beyond
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Undergrad Comet Sublimation: Why Does Halley's Comet Still Exist?
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