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 Virgo joins the measurement of gravitational waves
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High School Why don't galaxies obey gravity?
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High School Picture of "very" blue galaxy, good place for super nova?
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Undergrad Perlmutter presentation : pb on the age of the Universe
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High School Help me understand light traveling through vast distances in space
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Graduate Penrose: Noise in LIGO signal implies CCC
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High School How to debunk the idea we are the center of the universe
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High School Can someone please identify what I saw? (lights in the night sky)
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High School Distance between two orbiting bodies
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Undergrad IOAA 2nd problems: universe expansion
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High School How can light travel around an object in space?
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Undergrad What's the Latest Research on Gravitational Lensing?
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High School How to do the calculations showing the Universe is flat?
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Undergrad Galaxies moving away at the speed of light?
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High School Angular momentum, degeneracy pressure, and cosmic inflation
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High School Big Crunch, Big Bang and information loss
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Undergrad Proving equation for duration of transit
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Stargazing Did I Capture Pluto in My Backyard?
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High School Does observation *Determine* the past?
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High School Pulsar Beams: Spin, Wobble, & Projection
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High School What is the Unit for Gas Giant Planets in Astrophysics?
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High School Why are only hydrogen and helium created
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High School Fast Radio Burst Pinned Down to Giant Stellar Nursery
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High School Do we exist within a singularity
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High School Why didn't the Universe end up in a huge black hole?
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Undergrad A copy of me in an infinite universe
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Graduate Gravity as space-time curvature?
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Stargazing Can a Mobile Phone Capture the Beauty of the Night Sky?
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Undergrad No detection of gravitational radiation
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Undergrad Planck length and space expansion/contraction
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Undergrad Why is inflation initial patch length ~ 1 Hubble length ?
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Undergrad Why the GUT epoch ended at ~10^-36 s ?
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Stargazing Vega & Arcturus: Amazing Telescope Photos
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Graduate Computer simulation of neutrino physics research
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Undergrad Inflation: meaning of χ (chi) for time scales?
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Undergrad Quantum bits information lost in black holes
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Graduate Calculating Compound Angle b/w Planet & Earth-Sun Vectors
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Undergrad Inflation lecture from Guth : why does d(ρ)/dt = 0 ?
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Undergrad Calculation of daily solar insolation
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Undergrad Are photons from the CMB being emitted from beyond our cosmological horizon?
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High School It's not sure but Andromeda will likely hit us -- Is this true?
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Undergrad Why hasn't the light from the CMB already passed us?
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Undergrad Solar system simulation -- Significant deviation of some Jovian moons
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High School What Happens to Gases in Space and How Do They Behave?
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Undergrad Why invariable plane is tilted to ecliptic plane?
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High School So why is space travel so hurdlesome again?
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Undergrad Will an elliptical orbit self-correct into a circular one?
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Undergrad Taking Projectile Motion to make Planetary Trajectories
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Undergrad The particle horizon value is ignoring inflation?
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Graduate Does Magnetic Braking Theory hold up?
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Undergrad What is the C_l in the Fisher Matrix For An CMB Survey?
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High School Did Mass Exist in the Early Universe Before the Higgs Boson?
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Undergrad Orbits -- radial verses perpendicular orbits & energy
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Graduate The Big Bang model only deals with the known universe - True or False?
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Undergrad Stellar reddening via Av calculation
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Stargazing Anyone looking for the aurora tonight (July 16/17)?
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High School Could dark matter and dark energy be the same thing?
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Undergrad Computer friendly list of bodies in the asteroid belt?
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High School Kepler's 3rd Law, geometric relationship?
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Undergrad Where is a planet's gravity maximum?
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Undergrad Calculation of the hour angle of the Sun
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High School What is the relationship between brown dwarfs and giant gas planets?
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Undergrad Propagation of a light ray : Multiply or not by factor
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Stargazing Is there a solution for auto-guiding issues with a Celestron CGEM telescope?
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Undergrad The Big Bang: Exploding the Myth of a Center in Space and Time
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Undergrad Understanding the Early Chronology of the Universe
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Undergrad Do stars have any lower mass limit?
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Undergrad Observing Orbital Speed of stars within Galaxies
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Undergrad Equilibrium chaotic environment
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High School Another Earth-like system near us
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Graduate How Does the Stiffness of Supernova EOS Change with Various Parameters?
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High School Do black holes radiate antimatter?
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Graduate Help With Constraining Parameters in Massive Gravity Action
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Graduate Fisher Forecasting For EUCLID Survey Help
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High School Inclinations of star orbits in the Milky Way
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Undergrad Help with formula to calculate the precession rate change
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High School What Are the Orbiting Objects Around Luhman 16AB Called?
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High School Can this be another reason for dark energy?
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High School Sidereal Time and the Arctic Circle
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Graduate Neutron star mass-radius relation plot
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High School How many planets can we estimate in other galaxies?
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Undergrad Measuring distance to a galaxy using natural H20 laser
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High School Effect of the Sun's Gravity on the Moon
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Stargazing Where can I find high resolution photos of distant stars?
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Undergrad New possible explanation for Hubble redshift
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Undergrad Radial BAO size method and Hubble parameter
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Undergrad Don Page - cosmological doomsday argument
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High School Can Kepler Data and Machine Learning Discover Habitable Exoplanets?
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High School ? about oscillating models of the Universe and Entropy
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Undergrad Solar system's path in the Milky Way galaxy
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Undergrad Information for black hole region in surface surrounding it
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Undergrad Black hole - between horizon and singularity
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Undergrad Black hole - event horizon and Hawking radiation
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Undergrad What is the Cosmic Microwave Background and how can we observe it today?
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Graduate What is the Concept and Calculation of Geodesic Deviation in Physics?
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Undergrad Forming Asteroids: Dust, Gas & Vacuum Mysteries
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Undergrad Question on the particles that formed the Earth.
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Undergrad Infinite Regress: Cosmologists' Answer to the Dilemma
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High School Measurements on the entire universe
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High School Does gravity cause time dilation?
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