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 How big and how old is the Universe?
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High School Is the Cosmological Red Shift Evidence of Time Slowing Down?
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High School Are inflatons the same as fewer gravitons?
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High School The Semi-Major Axis of Binary Stars
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Undergrad Percent of stars in our galaxy that belong to clusters?
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High School Can we use technology to view the past through stars?
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Graduate What is the Current Status of Cyclic Cosmology and its Relation to M-Theory?
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Undergrad Can the information of the whole universe change?
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Undergrad Calculating the mass of a galaxy bulge
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High School Neutron Stars and Angular Momentum
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Undergrad Why are craters on the Moon nearly all circular?
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High School Is the smooth dark matter deBroglie's subquantic medium?
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Undergrad How do I compare a model to logarithmic data?
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High School Trying to study the major constellations
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Undergrad How is the arrow of time defined?
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High School Mass of Sun/stars (elemental/molecular vs. plasma)
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High School So I don't understand moon eclipses
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Graduate Gravitational waves in warm inflation
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Undergrad Scale of a in MOND and cosmological constant
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Stargazing Can Pluto be seen with amateur telescopes?
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High School Creating Universe from "Nothing": Astrophysicists Debate
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Undergrad Chemical Life Possible in Brown Drafw Atmospheres?
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High School Galaxy Clusters, Masses and Radius
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High School Why do we still see cosmic background radiation
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Undergrad Does time dilation prevent event horizon formation?
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High School What is the Hoyle State of Carbon and How Does it Contribute to Star Fusion?
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Undergrad Can a gravitational wave (GW) propagate in a flat universe?
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Graduate Flatness Problem Differential Equation
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High School Can Fuzzball Theory Replace Black Hole Singularity?
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Undergrad Converting galactical coordinates to horizontal/geographical coordinates
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High School Progress direction of the Aldebaran occultation by the moon
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Graduate Space Travel: Overcoming Cosmic Radiation Challenges
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Undergrad How to extract dark matter mass from a hydrostatic study
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Undergrad Solving the Andromeda Problem: A Newbie's Guide
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High School What Lies Beyond Our Understanding of the Cosmos?
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High School Cold or warm dark matter or a mixture
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Undergrad Sight and light travel are not the same.
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High School Can Anything Survive a Black Hole's Gravitational Pull?
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High School Is Electromagnetic Radiation a Key Factor in Intergalactic Space Expansion?
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High School How do we study space-time singularities?
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Undergrad Could Light Cones Actually Curve Inward Towards the Big Bang?
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High School Mars' Global Sandstorm: Causes and Effects
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Undergrad Could Anisotropic Expansion Explain the Dark Matter Effect?
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Where Can I See the Milky Way Near Washington DC?
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High School Huge amounts of water ice found on Mars
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Undergrad Euclidean differential number counts of supernovae
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High School Early state of Universe and the "size" of Universe
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Undergrad Black Hole Formation: Fermion Pressure & Neutron Stars
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High School Can we build a four dimensional compass?
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Undergrad How do cosmologists view loop quantum cosmology?
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High School How to measure the amount of gravitational lensing?
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Undergrad System simplification through state space
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High School What could explain the existence of The Great Attractor?
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Undergrad Why is the Primordial Power Spectrum Defined as P(k) = (k^3)/(2π^2)|w_k|^2?
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High School Is time dilation accounted for in calculating expantion
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Undergrad Objective classification of spiral galaxies
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High School If energy is created with expansion and it has no limit....?
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High School Why gas clouds collapse if the forces are conservative?
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Undergrad Are Red Dwarfs Home to Earth-Sized Water Worlds?
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Stargazing North American nebula from this past summer
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High School If an object runs an infinite distance in universe....?
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Undergrad RA and declination of Sun & phase of Moon program
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High School Supervoid/Cold Spot evidence of Hawking radiation?
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Undergrad Collapsing Nebulae: Outward Force of Gas Explained
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Stargazing Supermoon Monday: Closest Approach in 70 Years
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Undergrad Could Space-Time Curvature Enable Time Loops?
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Stargazing Dust on the Mirror: Is Cleaning Worth the Risk?
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High School Are Primordial Black Holes the Key to Dark Matter?
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Stargazing Is Your Camera's Sensor CCD or CMOS?
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High School Flatlanders in the 3rd dimension "Hyperspace"
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Undergrad Why exactly does the ocean bulge on both sides of the Earth?
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Undergrad How do inflatons and gravity interact?
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High School Unruh & Hawkins Radiation: A Comparative Analysis
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Undergrad Unraveling the Mystery of Matter-Antimatter Asymmetry in the Early Universe
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High School When are we "trailing" the Sun in its galactic revolution?
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Undergrad Dark Energy: How Can ~73% Of Universe Exist?
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High School Is it possible to visualize the big bang?
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High School Does antimatter fit into the standard model
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High School Can entropy be measured in a singularity of infinite density?
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Insights A Poor Man's CMB Primer. Part 2: Bumps on a Blackbody - Comments
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Undergrad Why is the ISS at a 51.6 degree orbital inclination?
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Undergrad China launches X-ray Pulsar NAVigation satellite
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Undergrad Is Constant Mass Density in the Universe Linked to the Casimir Effect?
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Undergrad Are all planets in our Solar System in the same plane?
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Undergrad Can Time be Measured Absolutely w/ SNe Ia Near a Black Hole?
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Undergrad Realistic coasting cosmology from the Milne model
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Undergrad Converting Planck data for spherical projection
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Undergrad Revolutionize Space Travel with Innovative Vacuum Launch Method
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Undergrad Dark Matter PBHs: Theoretical and Experimental Evidence Against Axions and WIMPs
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Graduate Velocity Dispersion: Meaning & Difference Explained
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High School Rosetta's comet mission discussion thread
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Undergrad Debunking Interstellar Travel: Separating Fact from Fiction
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Undergrad Calculating the Rotation Curves of Galactic Disks
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High School Methods of accelerating in space?
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High School How Are Images of Gravity Dips in Space Created Without a Sense of Direction?
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Undergrad Space expansion and Universe as computation
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High School Why the Milky Way shows band in all-sky energy scans
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Undergrad Moon's End: What's the Scenario?
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Undergrad Is the space elevator affected by lightening, sprites, emf?
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Undergrad Is the Drake Equation a Reliable Tool for Estimating Extraterrestrial Life?
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