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 MOND/MOG vs DM: Deuterium Abundance Constraints
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Undergrad Earth's rotational speed in the past.
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Graduate Animation/visualization of galactic rotation rates (dark matter)
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Graduate Why Can't Flows in Phase Space Cross?
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Graduate Empty universe except for three indentical planets
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High School Why do we experience seasons on Earth?
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Graduate Explore the Mysteries of Gamma-Ray Astronomy with NASA's GLAST Mission
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Graduate Spacetime diagrams and proper time
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Graduate Is Light Attracted or Converted by Black Holes?
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Undergrad What Are Quasars? Explained by Hubble Telescope
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Graduate We are in a Schwarzschild black hole-T or F?
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Graduate Is the Radius of Curvature of the Universe Constant Over Time?
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Graduate How to measure the tangential component of velocity of receding starsor quasars?
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Graduate Is gravity really a force in the expansion of the universe?
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Graduate Video lecture on Loop Quantum Cosmology
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Graduate How Do Vacuum Energy and the Cosmological Constant Influence Universe Expansion?
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Undergrad What if Mars Had Been Closer and Venus Farther?
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Graduate Ripple deSitter universe-Randono cannonball analog
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Graduate A message from bBeyond the red horizon? or just more epicycles?
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Graduate Mystery of the "Cosmic Blank Spot": A Billion Light Year Void
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Graduate Gravity and coordinate acceleration
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Graduate Does anyone know how to read these diagrams?
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How to solve every physics problem ever and understand the universe
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Graduate Positive Curvature: Maximum Area of Equilateral Triangle
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Graduate Calculate how mass creates a curvature in relativity
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Graduate How Relativity say about redshift in terms of curvature?
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Undergrad Solar Radiation AM - Danilo's Question
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Finding a Moon Spectrum Graphic: Can You Help?
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Undergrad Why Syrius in the past was a red star?
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Witness GLAST Launch: Now on Virtual Institute of Astroparticle Physics
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Graduate What do I use to determine rotational speed of solar nebula?
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High School Unveiling the Mysteries of Dust: Composition, Properties and More
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Night Sky Views from the Edge of a Distant Galaxy | Manuel's Perspective
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High School Is Our Solar System Really 2D in Planetary Rotation?
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Graduate Can String Theory Explain Quantum Gravity and Fundamental Constants?
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Graduate Accumulation of Mass in Stellar Formation?
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GLAST scheduled for launch on 3 June
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Stargazing Discover the Wonders of the Night Sky with WorldWide Telescope
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Graduate Entanglement instead of inflation
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Graduate How Can Black Holes Form and Behave in Our Universe?
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Graduate Derivation of Escape Velocity Inconsistency
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Graduate There's more starlight than we thought (nearly twice as much)
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Did We Spot the International Space Station from Brockville, Ontario?
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Graduate Szapudi reasons to drop alternatives to dark energy
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Graduate What Are the Challenges and Proposed Solutions for Terraforming Mars?
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Graduate Why Are We Not Constantly Bombarded by Neutrinos from the Stars?
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Undergrad When Will Earth Be Tidelocked To The Sun?
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Graduate Why do stars with masses greater than 1.2M(sun) have convective cores?
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Is Our Universe Contained Inside One Atom?
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Graduate New to the board. Gravity questions
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Graduate Can Singularities Exist if Points in Space Are Finite?
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Graduate Was the Universe Not Perfectly Homogeneous at Photon-Decoupling?
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Graduate Visualizing Astrophysical N-body Systems, John Dubinski
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Undergrad Understanding Vapor Pressure Laws for Astrophysics
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Graduate Diminishing Results in Cosmology: Public Interest Fading?
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Undergrad Effects of a decreased rotation veloctiy
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Undergrad What is the Temperature of an Electron?
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High School What does it mean the number after the stellar class? Magnitude?
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Graduate Can Planets Form Without Stars?
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Undergrad Sun formed on a core of a supernova?
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Undergrad Planet formation and star formation
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High School Sun's Mass Loss: How Much Is Lost Annually?
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Undergrad Gravitation attraction proportioned
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Graduate Refractive index of Martian atmosphere near surface
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Graduate Graph with Saul and Perlmutter's results
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Graduate Good intro to cyclash universe by Steinhardt
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Graduate Cosmic Accelerators summerschool videos
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Graduate Simulating globular clusters over blackholes with Fortran
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Graduate Frontiers and Controversies in Astrophysics Part 1
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Graduate Is Redshift an Accurate Indicator of the Universe's Expansion Rate?
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High School What is the Difference Between an Open and Closed Universe?
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Graduate Could Variation in Light Speed Explain the Horizon Problem?
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Mars weather forecast: Clear skies, high of -30
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Graduate What Is the Event Horizon Size When All Matter Is Infinitely Packed Together?
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SK15075PEQ3-2- Diameter/Aperture: 150mm- Focal Length: 750mm-
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Graduate Reading my first Astrophys paper
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Graduate Superwind phase in stellar evolution
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Graduate Is the Pioneer Anomaly Evidence of Slower Movement Than Physics Predicts?
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Graduate Black Hole Questions - Answers to Your Queries
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Undergrad Black holes and magnetic fields?
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Graduate Xray flash warns of supernova explosion
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High School Radio waves are electromagnetic.Right?
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Graduate How Does Dark Matter Influence Our Understanding of Atomic Structure?
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Graduate Each planet's angle from it's argument of perihelion
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Graduate Newton: Is MOND the Answer to Dark Matter?
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Graduate Is There Evidence of an Opposite to Black Holes in the Universe?
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Graduate What is the Nature of Dark Matter and How Are Scientists Trying to Discover It?
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New Special Issue: Dark Energy in GRG Journal
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Graduate Cosmological Constant in mks units
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Graduate Questions on mass-to-light ratio
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Undergrad Experience with the program 'Gaussfit'
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Graduate Proper distance at time of emission
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Graduate Object that we can observe where all 3 types of redshifts
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Penrose Lecture: Find Web Address for Lecture
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Graduate ESF release on tapping early universe (23 May)
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Graduate Calculating the cosmological constant from scratch
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Graduate What's the implication of calulationing the apparent angular sizes of a galaxy
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Undergrad Celestial body could to return tho the star for another perihelium?
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Graduate Angle deflection from gravitational lenses
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Undergrad Universal Warming: Other Inputs to Global Temperatures
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