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 Are there any habitable binary star systems in the Kepler catalog?
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Undergrad What is the Correct Calculation for the Pressure at the Center of a Planet?
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High School What is the easiest way to start college in Physics, Astrophysics, or Astronomy?
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Undergrad Could Redshift not result from the Doppler effect?
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Graduate Is there a problem in assuming the universe has a boundary?
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Graduate Is the Earth's Distance from the Moon Affected by Universal Expansion?
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Graduate Is universe a 3 dimensional fractal .?
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Graduate How Much Man-Made Junk is on the Moon After 43 Years and Counting?
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Graduate Keep track of cosmos by size or by elapsed time? Your preference?
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Graduate Age of the universe in earth's reference frame?
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Undergrad How does temperature change as you move away from the sun into space?
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High School Short term atmospheric retention.
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Graduate Can Astrophysics Reveal Our Place in the Universe and Ourselves?
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High School What should I do to become an astrophysicist at 13 years old?
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Undergrad The Cause of Earth's Rotation: Faradey's Motor or Something Else?
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Graduate NASA's new WISE Survey Results (and dark matter)
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High School Why Do Star Trails Appear Denser on One Side of the National Geographic Photo?
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Graduate What proof is there that time started at the moment of the big bang
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Graduate Is the Universe Truly Flat While Space-Time Curves?
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Undergrad Life on Mars: Did Asteroids Transfer Bacteria to Earth?
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Graduate Plate tectonics on exoplanets/moon.
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Undergrad Atmospheric Density Profiles of Europa and Mars
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Undergrad Martian Core Composition: Is it Solid or Liquid? My Theory on Volcanic Activity
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Undergrad After the Big bang ,when did the first atoms form?
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Graduate Are Supersymmetric Inflation Models Still Viable After LHC's Latest Results?
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Graduate Does the big bang theory conflict with the law of conservation?
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Graduate Measuring the size of the observable universe
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Graduate F(R) gravity with non-minimal carvature-matter coupling
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Undergrad Escape velocity in the atmosphere
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Graduate Early galaxies in formative stages: where are they now?
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Graduate Question about universe formation
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Undergrad Where Does Energy Originate?
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Graduate Supernova 1a Distance Calibration & Implications for H_0
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High School Is Earth's Thin Atmosphere Caused by the Moon?
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Graduate How Do Two Doubling Times Shape the Standard Cosmic Model?
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Graduate Dark Matter and Eternal Inflation
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Graduate Can Quantum Mechanics Explain Multiple Universes in the CMB Map?
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Graduate Big Bang modeled as a phase-change
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Undergrad The Sun is very spherical - allegedly
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Graduate Heliophysics: the last ten years and the next ten years agenda
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Undergrad Ultra-high-energy cosmic ray ≠ collision of 2 'normal' rays?
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Graduate Did the universe start as dimensionless and evolve through higher dimensions?
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Graduate Why did we stop at 46.5 billion light years?
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High School How long will it take for the Earth to become tidally locked to the Moon?
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High School A trivial question but who can answer it ? (Friend from Algeria)
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Graduate The Aftermath of a Large Comet Impact on Mars
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Graduate Dark Matter in Galaxies/Star Clusters
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Graduate Power of inflation in relation to expansion
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Graduate How much energy is there in the Universe?
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Graduate Light’s temperature and particle’s temperature from 3000K
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Graduate Could a Curved Boundary of Space-Time Explain Dark Energy?
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Undergrad Curious about the age of the Universe
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Graduate Mass Absorption -V- Black Hole size
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Undergrad Which planet in this solar system would be most appropriate to terraform?
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Undergrad Orbital slingshot energy - energy from gravity?
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Undergrad Do Heavy Elements Come Only from Supernovae?
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What is the Latest Rover on Mars and Who Helped Make it Happen?
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Undergrad Expansion of space: Earth - Moon
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Graduate Understanding Energy Density in Cosmology
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Looking for source of cosmology/astrophysics quote
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Graduate Copenhagen interpretation of Big Bang
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Graduate The nature of nothingness/space, and potential multiverse
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Graduate Review of Evidence for Dark Matter
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Graduate Could dark energy be gravitational potential energy?
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Undergrad Calculating Distances 1 Billion Light Years Away
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Graduate Necessary and sufficient conditions for matter clumping into heavenly bodies?
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Graduate Too fast for a black hole to consume?
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Graduate Does anyone know how to correct for reddening in a CC-diagram?
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Graduate Could Dark Matter Explain the Mystery of Shear Viscosity in Neutron Stars?
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Graduate Sun Orbital Scanner: Magnifying Star Systems to Detect Planets
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Graduate Cosmic Microwave Background Radiation
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Graduate Quantum tunneling and the universe
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Graduate Why Does Dark Matter Appear Scale Variant in Galactic Rotation?
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Graduate Gravitational field strength for irregular object
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Graduate Will the expanding universe really end up cold and empty?
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Undergrad What Would Happen if Our Moon Had a Moon?
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Graduate Spatial dimensions inside a black hole
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High School Stars: North, South & Equator Positions
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Graduate How is galaxy mass calculated using luminosity
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Graduate Low Entropy big bang , models that explain it
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Undergrad How does declination and right ascension relate to latitude / longetude?
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Graduate If the Earth were adrift in space, what would happen to its atmosphere?
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Graduate Viscous fingering and structure of space
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Graduate Big Crunch to Big Bang: Is Our Universe Eternal?
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Graduate Is there a maximum mass for a black hole?
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Graduate Can the Holographic Principle Solve the Mystery of Black Hole Information Loss?
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High School Is the Earth Electrically Charged?
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Undergrad How do you relate space&time and matter&energy?
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Graduate Estimate Star Formation Rate: Kennicutt-Schmidt Law
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Graduate Exploring the Origin of Elements to Nucleosynthesis and Fusion in Stars
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Undergrad Minimum Distance Between Earth & Mars: Analytic Calc
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Graduate Does WMAP data imply spacetime is flat?
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Graduate Is 300eV the Correct Mean Photon Energy for a Black Body at 1 Million K?
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Graduate The philosophy of Wormholes, Blackholes, Deep space, etc
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Graduate Can an Asteroid Collision with the Moon Create a Debris Cloud Around Earth?
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Undergrad Solar flares & CMEs: Serious threat?
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High School Positions of stars as seen from Mars-different than from Earth?
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Graduate Poisson and continuity equation for collapsing polytropes
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Undergrad Why Correct Horizontal Parallax Errors?
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Undergrad Can a Planet Support an Atmosphere with 50% Earth's Gravity?
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