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 Sun's Layer Dynamics: Charting Individual Motions
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Graduate Deriving radial velocity as observed from infinity
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Graduate Correcting for sun diameter and refraction in sunrise/sunset equations
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Graduate What Happens Inside a Black Hole If Dark Matter Falls In?
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Graduate Have the Laws of Physics Changed Over Time?
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Undergrad Where does the galactic distance equation come from?
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Graduate Methanol Maser Emission: Strength and Effects on Earth
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Graduate Can the Universe Truly Be Nonphysical?
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Undergrad Universal Constants: Books for Laymen about Observable Effects
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Undergrad Gravity Leaking = Dark energy increasing
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Undergrad How large would a moon impact event have to be to affect the Earth?
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Mystery Roar from Faraway Space detected
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Graduate Energy required to fracture a planetary mass
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Graduate Imperfections in perfection? Big bang
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Graduate Is the CDM particle still elusive?
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Astrophysicist Neil DeGrasse Tyson. Death by Black Hole
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Graduate Does Density Affect Gravity in the Formation of Neutron Stars?
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Undergrad Proof of the Big Bang and the Age of The Universe?
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Graduate Question about the Steady State Theory (Cosmological model)
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Graduate Is all matter in the universe moving at light speed?
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Graduate Why is dark energy/matter better than a new theory?
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Graduate SDSS Quasars & Cosmology: Challenges to Current Models
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Graduate Could There Be a Place in the Universe That's Completely Black?
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PF PHOTO CONTEST - I'm in a wide open space (jan3-10)
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Undergrad Milky Way spins faster, has more mass than thought
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Graduate How Did Planets and Moons Form from Cosmic Debris?
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Graduate Universe's Missing Matter and Black Holes
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Undergrad Arriving at Friedmann Equation with Newton's Mechanics
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Graduate Origin of suspected black hole in Omega Centauri
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Graduate Twice as much dark energy as dark matter
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Graduate Are Quasars and Galaxies Redshifts Truly Quantized?
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High School Meade NGC-70TC Refractor Telescope: Left-to-Right Inversion Explained
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Graduate Young galaxy's magnetism surprises astronomers
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Graduate I have a little problem with the big bang
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Undergrad What is the Electric Field Strength of the Sun?
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High School Parachute in Space: Can It Deploy?
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Graduate Neutronium Armor: Could it Actually Protect?
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Graduate Why not steady and Quasi staedy state?
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Graduate Quasars: A Different Perspective?
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Graduate Is cherry picking evidence a hindrance to scientific progress?
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Graduate Can the physics of consciousness transcend space-time?
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What Are Some Stunning Astronomy Pictures?
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High School How do satellites stay in orbit?
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Graduate Is Dark Energy Just a Misunderstood Form of Gravity?
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Graduate Questions about the Universe: Big Bang, Dark Matter & Expansion
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Graduate Could a Collapsing Universe Result in a Cosmological Blueshift?
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Graduate Dark matter or just unobservable?
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High School Is the World Really Ending in 2012 as Some Predictors Claim?
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Stargazing Why isn't my telescope magnifying properly?
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Graduate Baryon density of the universe at recombination epoch
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Graduate Moon's Tidal Forces puff up Earth
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Undergrad Why Do Satellite Ground Tracks Oscillate in Latitude?
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Graduate Higgs Boson and Hawking Radiation
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Graduate A question about distance and time(2nd)
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Graduate Can Antimatter Collision Create a Black Hole?
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Graduate Is the total energy of the Universe Zero?
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Graduate Intuitive problems with the standard model
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Photo of Einstein, Hubble, and LeMaitre together?
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Graduate Fine tuning - island of stability of our world
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What is the 2 cap/hole on the 5 tube cap of the Celestron 130 SLT used for?
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Graduate Earth's formation & Late Heavy Bombardment
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Is Space Exploration Humanity's New Manifest Destiny?
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High School How Do Spacecrafts Gain Speed in Space?
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High School Universe is made of baryonic matter
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Unsolved Historical Mystery: Greek Astronomer's Mysterious Observations
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Graduate Explaining blackholes dark matter ?
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Graduate Understanding the Role of Space as the Background for Light and Gravity"
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High School Info 'bout black holes, and is there one in the center of the galaxy?
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Graduate Supernova Ia Spectrum | Understanding Dark Energy
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Undergrad How universe gradually becoming flat?
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Graduate Unveiling the Real Age of the Universe: Could It Change Our Thinking?
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Graduate Why would large quantities of dark matter not stick together ?
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Graduate Galactic cosmic rays and our world.
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Graduate Death of a Black Hole: Does It End in Neutron Star?
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Are Non-Carbon Based Life Forms Really Possible?
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Graduate Cosmological Constant or Quintessence
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Undergrad How does a parsec relate to the age of the univers?
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Graduate How do astronomers look at historic CMB?
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Graduate Unpacking the Validity of the Second Law of Thermodynamics: A Scientific Inquiry
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Undergrad Inclination of Meteorids and Craters
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Graduate Calculating Wavelengths of Redshift in Cosmology
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Graduate Tighter bounds on cosmo parameters (Chandra Cluster Cosmology Project)
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Graduate Dark Energy: Supernovae Ia, Vacuum Energy & Quintessence
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Graduate Doughnut-shaped Universe: Astronomers say Universe is small and finite
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Graduate Exploring the General Form of FLRW Metric
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High School A question about distance and time
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Graduate Size of the universe from a different perspective
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What is the Astronomy Picture of the Day?
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How much mass energy exists in the universe?
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Graduate How does gravity affect organism size on different planets?
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Graduate Is Dark Energy the Key to Understanding the Expansion of the Universe?
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Graduate Space-Time Topology Theory: Learn About Popular Theories
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Graduate Is Gravity Geometry or Quantum in Nature?
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Undergrad Conversion of healpix fits file to normal fits file
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Graduate Stars, Ozone, & Evolution of Complex Life
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High School Is it possible to reach absolute zero?
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Undergrad Dark Energy Project: Studying the Universe
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Undergrad Why Do Stars and Galaxies Keep Spinning?
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High School About the Earth's orbital velocity
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Graduate Baryon asymmetry and conservation of charge
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