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 Is dark matter just an illusion?
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Graduate What Causes a White Dwarf Star to Exceed the Chandra Mass Limit and Explode?
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Stargazing I want to build my telescope any advice ?
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High School Astronomy in West LA: Can You Observe with a Telescope?
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Undergrad How Big Would A Planet Have To Be To Have Earth's Gravity?
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Graduate How can a neutronstar that only consists of neutrons
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Undergrad Physical properties of objects that orbit each other in the universe
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Graduate What is the mystery behind the puffy planet HAT-P-1?
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See Sunset from Space: Orange Clouds?
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Graduate Double Lobed Radio Galaxies & Seyfert Galaxies: Similar Energy Sources?
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Undergrad !Evidence of Star Formation in Molecular Clouds
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Undergrad What if objects go toward each other rather than away
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Satellite Photo: Is It Plausible?
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Undergrad Jupiter's Atmosphere: Questions & Answers
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Graduate Can Light Be Multiply Scattered in the Universe?
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Stargazing Upgrade Telescopes: Get Into Astrophotography & Stargazing near LIGO
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Graduate The cross section of a photon traversing the observable universe
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Graduate Supernova 1987a, light, neutrinos, VSL claims
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Graduate New double pulsar testbed for GR and alts.
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Graduate CP violation and element forging
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Graduate Could Gravitational Lensing Confirm the Existence of Dark Matter?
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Graduate Gravity On Earth Dependant On Distance From Center
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The Ultimate Question: What Created the Universe?
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Graduate Just an idea I've been going over.
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Graduate How Do You See Spectral Lines in Near IR from the Sun?
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Graduate Tiny Blackholes may pervade space
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High School Pole Star Help: What Was the Pole Star 9-10,000 BC?
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Graduate Wet planets common (new simulation study by Raymond et al)
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Graduate What Is the Role of Vacuum Fluctuations in the Universe's Origin?
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High School What Defines a Planet?
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Undergrad Sedna must be a planet (at least for now) according to new definition?
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Graduate Superluminal Matter at Two Stages of Big Bang ?
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How Big is Earth Compared to the Sun?
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Earth Narrowly Escapes 2006 QM111 Asteroid Flyby
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Graduate Research Project Ideas - Taylor's Brainstorming
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The Astronomy Peer Review Process
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Graduate Possible webpage title: What Are the Possible Explanations for Dark Energy?
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Interested in The Sky at Night webcasts?
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Will a Satellite Crash into the Moon Tonight?
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Undergrad Why does higher density of the early universe result in a faster expansion rate?
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Graduate How Does Precession Relate to Hindu Scriptures and Ancient Astronomy?
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Graduate Big Bang : 'Proofs' and observations
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Graduate Please shoot this, somebody (Laura Mersini-Houghton paper)
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Graduate The Mystery of Ringed Planets: Uncovering the Cause
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Undergrad How close can planets safely exist from each other?
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High School Do All Planets Have Moons and How Did They Form?
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High School Is Space Just a Magnified Illusion of a Fluid Universe?
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Graduate Can the Universe Be Understood as a Two-Dimensional Model?
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Graduate Is Infinity Possible? A Discussion on Hawking's Theories of the Universe
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Rare Astronomical Event Observed for the First Time
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Popular Cosmology Books - Which to Buy or Not?
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Graduate Wolfgang Priester forsaw Big Bounce cosmology
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High School Why Is Pluto No Longer Considered a Planet?
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Graduate Could Quasar Activity Explain the Distribution of Dark Matter in Galaxies?
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Graduate Was the Singularity Rotating at the Time of the Big Bang?
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High School Earth, Sun & Galaxies: Physics of Movement
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High School Mars Closest Encounter With Earth
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Undergrad Universe could be Bigger and Older - Move over 13.7 Gy
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Graduate What is the nature of Dark Matter?
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Graduate Investigating an Unknown Hypothesis on Gravity Unequality
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Undergrad Calculating Limiting Magnitude for 12-Inch Telescope: Tips and Advice
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Graduate Locacal coordinate system in GR observed?
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Undergrad Now Its Official: Eight Planets (Pluto got bumped)
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Undergrad Brightness of Mars as observed from earth
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High School Stars Burning in Space: Unanswered Questions
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Undergrad The moon moves in a near-circular orbit around earth
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High School Measuring in Space: How Sensors Work in the Cosmos
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  • Poll Poll
Undergrad What Defines a Planet?
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Undergrad Rehash: speed of falling object at Earth's centre
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Call them DOLPHINS (not dwarf planets )
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High School Only earth orbits in a circular motion?
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High School What Truly Defines a Vacuum?
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Graduate Type Ia Supernovae: Implications for Cosmology
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Graduate Why is our universe the way it is?
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Graduate Why Does Light Bend Around Massive Objects?
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Graduate Planck black-box radiation and the universe
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High School What is the red circle near the moon phenomenon?
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Graduate Deriving Friedmann Equation from RW Metric - Blumfeld
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Graduate Solution to the lithium discrepancy
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Graduate What are the Origins and Characteristics of Cosmic Neutrinos?
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Graduate Expanding universe and Conservation of energy.
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Undergrad Doppler Effect and the Expanding Universe
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Graduate The Existence of the Red Ball Law: A Universal Truth?
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Graduate Drake Equation: Parameters, Missed Factors & Technical Limits
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Graduate How are the Casimir Effect, Vacuum Energy, Inflation, and Dark Energy Connected?
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Undergrad Just a question of planetary magnetism
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Graduate Does the bending of light by objects affect our view of the universe as a whole?
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High School Galaxy Splitting: Has it Ever Occurred?
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Graduate Is the Multiverse Theory More Plausible Than Inflationary or Ekpyrotic Models?
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Graduate Black Holes & Light: Theory or Fact?
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Graduate Blackholes theory maybe incorrect?
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High School What Are Some Questions About the Universe That a Newbie May Have?
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Rooting for Roaches in Space: Madagascar Hissing Roaches Thrive in Vacuum
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Stargazing Buying a telescope any suggestions?
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Graduate Universe might be older and bigger
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Graduate Ultimate configuration of a flat universe
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Graduate Where Does '13.7 Billion' Come From?
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Graduate Is Planck's Constant Constant, or Does it Vary Through Spacetime?
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What Would Watching TV on the Moon or in Deep Space Look Like?
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Undergrad Phases of the Moon: Angular Separation Question
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