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.
Graduate Why Do Different Planetary Simulation Softwares Show Discrepancies?
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Graduate What happens when two black holes collide?
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Graduate Interstellar Travel: Theorical Force to Stabilize Wormhole
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Graduate Could Gamma Radiation Bursts Be Evidence of Superluminal Travel?
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Graduate Does a bounded universe require more dimensions?
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Graduate Can planetoids repair complete fractures?
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Graduate Unraveling the Mystery of "Seed Universes"
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Graduate Is Dark Matter's Temperature the Key to Its Mystery?
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Graduate Understanding the Impact of Increased Universal Expansion Rate
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Graduate Is Lambda a True Force or Just a Distortion of Spacetime Like Gravity?
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Undergrad Expanding Galaxies: Man Asks Question
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Graduate How Does Dark Matter Affect Orbital Dynamics in the Universe?
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Stargazing Upgrading Telescope Lens: Is it Possible for Meade StarQuest 60AZ-M?
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High School Why Don't Particles in the Sun's Center Reach Absolute Zero?
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Graduate Can a Black Hole Self-Destruct?
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Graduate Could life exist inside a black hole?
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Graduate Difference between particle horizon and cosmological event horizon?
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Graduate Seeing the edge of an unbounded, closed universe
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Graduate Universe be determined by some average per volume temperature ?
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Graduate DM Halo Movement: Predicted vs Observed
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Graduate Spin of Black Holes: How Does it Affect Collapse?
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Can space be perceived in more then one way?
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Graduate Cosmological Constant and the like
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High School Decoding the Meaning of 2003 UB313: A Discovery from October 21, 2003
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Graduate How does the orbital diameter of 2003 UB313 compare to its orbital period?
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Graduate What Caused the Strongest Explosion in the Universe?
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High School Why sun looks bigger in the evening?
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High School Spectra Graph: Definition & Examples
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Undergrad Reaching Equilibrium: Estimating Time to Balance
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Graduate What Causes the Enigmatic Black Aurora Phenomenon?
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High School BVRIJHK Photometry: What Do the Letters Stand For?
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Graduate Schechter Function of Galaxy Luminosity-Density relationship
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Graduate Could a Planet Gain Mass and Ignite as a Star?
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Graduate Has Lightspeed Changed Over Billions of Years?
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Graduate Did Simon Singh get stumped at the end of his Big Bang lecture?
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Graduate Could We See the Edge of the Universe?
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Graduate We all love to prove things [spectral broadening/relativity]
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Undergrad Undergrad: General Astronomy Questions.
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Graduate Is Dark Energy+Matter product of quantum particle-pair creation?
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Graduate Dark Galaxy Discovered: Unbelievable Findings
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Graduate Is Time Measured Differently During the Big Bang?
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High School Inflationary Theory Explained: A Beginner's Guide
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Graduate What is at the Edge of a Closed Universe?
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Undergrad Is Our View of the Milky Way Accurate or Just Another Galaxy?
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Graduate Urr, this doesn't seem like it should be very hard but well, good 'ol me
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Why Are Two Stars Leaving Our Galaxy?
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Undergrad Could something be seen going the speed of light?
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High School Variable Stars: What Causes Their Brightness to Vary?
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Graduate What is behind the pulsation of the light of a Cepheid?
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Undergrad So, what would happen if a comet the size of our moon collided with Venus?
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VERY high resolution Cassini photos?
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Undergrad Infinite Gravity: Photons Particles w/o Mass?
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Graduate The Pioneer Anomaly: A Doppler Shift Explanation
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High School Is Everything in the Universe Defined by Opposites?
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Graduate Black holes: best candidate for dark matter?
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Does the Universe Have a Mind of Its Own?
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Graduate What Are the Sources and Generation Methods of Neutrinos?
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Undergrad Small Comets, Dr Louis Rich, & Water In Space
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Graduate Hawking radiation, Is it possible?
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Have you seen the hilariously bad movie, Plan 9 from Outer Space?
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Graduate Can Hyper-Velocity Stars Illuminate the Structure of the Galactic Halo?
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Universe Today PDF: Interested in Astronomy?
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Graduate Big Bang Radiation: Does Gravity Reverse Its Spread?
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Graduate Is the Universe Flat or Does it Have a Height?
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Undergrad Big-Bang Theory Modification Real or Not
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Graduate Fabric of Space-Time: Investigating Wormholes
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Graduate Cosmic Microwave Background primer
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Roving Mars: IMAX movie coming soon
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Graduate A question related to cosmology( or perhaps philosophy)
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Graduate Dating techniques for our universe
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Graduate Do quasar redshift anomalies challenge mainstream theories?
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High School Has Dark Matter Been Found and Does It Bend Light?
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Undergrad How Do We Calculate the Weight of Celestial Bodies in the Solar System?
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Graduate The Mysteries of Stellar Evolution in Low Metallicity Environments
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Undergrad Is the Sun's Core Really Made of Iron?
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Graduate Terrestrial planet search review paper
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Graduate Explaining Planet Ejection in Planetary Forming Systems
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Undergrad Horizons Mission: How Will the New Horizons Probe Leave the Solar System?
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Graduate CMBR as an absolute reference frame
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Undergrad Gravitational flux in solar system?
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Undergrad Equitorial/Horizontal co-ordinate questions
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High School Air baloon and came back down about 12 hours later
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Undergrad Vaporizing Black Holes: Does It Really Happen?
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Graduate Important Findings on Dark Matter
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Undergrad Does the Expansion of Space Mean Everything is Growing?
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Graduate Sun ejects its outer layers as it becomes a white dwarf
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Graduate Close encounters of the massive kind
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Undergrad How Does Jupiter's Gravity Affect Its Gas Composition?
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Undergrad Will Stardust's Return Uncover Hidden Cosmic Secrets?
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Graduate Is the Singularity Infinitely Dense and Small?
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Undergrad NASA Observation: Cartwheel's Massive Rings
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Graduate Life on a brown dwarf or a fissioning rouge planet?
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Graduate Nemesis and Planet X: Can they be Ruled Out?
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Graduate What Do Orbital Motions of Outer Planets Reveal About the Pioneer Anomaly?
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High School Exploring Our Solar System: Gas and Debris
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High School 'nothing' happened before the big bang?
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High School Determining Best Time of Year to Observe a Star - Astronomy for Beginners
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Graduate Are Multi Universes and Infinite Space Possible with Big Bang Theory?
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Graduate What is the Latest Update on CMB (end 2005)?
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Graduate A New Explanation for Venus' Retrograde Rotation
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