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 Time Measurement on Earth vs the Universe
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High School Is the Apophis Asteroid a Serious Threat and What is NASA Doing About It?
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The smartest man in universe believes in Intelligent Design
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Undergrad Astrophysics Starter Guide | Find the Best Textbooks
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Graduate Why do we Still Believe in Newton's Law?
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Stargazing First is the Blue Snowball , a planetary nebula.
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Graduate Temperature Effects of a Doubled Radiation Emission from an HII Region
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Graduate Exploring the Relation between \Gamma and H in the Early Universe
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I know, lets launch a car into space
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High School Really Simple Circumference Question
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Undergrad Eclipsing binary problem im really frustrated
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Graduate : Comparing Radii of Black Hole & Fast Moving Bodies
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Discover the Incredible Video That Will Make You Wonder
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Graduate Calculate Total Energy Radiated by Sun During Evolution
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Graduate How to Determine the Period and Separation of an Eclipsing Binary Star System?
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Undergrad Having trouble with eclipsing binaries.
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Undergrad What Are the Current Unsolved Mysteries in Astrophysics?
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Undergrad How come we can see galaxies 9 B l/y away if universe is only 14 B y/o
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Graduate Flatness Problem: Deriving Relation from Friedmann Eqns.
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Graduate Is Energy Fully Conserved in an Expanding Universe?
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Graduate Cosmological Red Shift: How Does z Change With Time?
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Graduate When does the event horizon form?
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Graduate Evidence for Dark Matter: Bullet Cluster X-Ray & Weak Lensing Study
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Graduate UMC Time, Right Ascension and Longitude
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Graduate Atmospheric Refraction: Converting Density Profiles to Refractivity
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Detecting transmission signal destinations
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High School Galaxy Collision: Will Milky Way & Andromeda Pass or Collide?
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Graduate Tolman Surface Brightness Test -
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Undergrad Paradox of the Expanding Universe: Debunking the Big Bang Theory
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Undergrad Black Holes in a Newtonian (non-Einsteinian) World
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Graduate What are B mode and E mode signals?
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Graduate Tolman surface brightness test -
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Undergrad Infinite Energy and the Big Bang: Understanding Heat as Energy in Physics
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Graduate New universes will be born from ours
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Undergrad Friendly discussion: How do you feel the singularity came to be?
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Stargazing Build Concave Mirrors Up to 1.5M Dia: Design a Grinding/Polishing Machine
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Public Star Parties: Learn What to Expect at Your First Event
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Graduate GPB: Latest News and Research Results
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Graduate Calculating Critical Density and Cosmological Constant
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Undergrad Is the Conservation of Mass/Energy Challenged by the Big Bang Theory?
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Graduate Why is the peak frequency of the Cosmic Microwave Background 160 GHz?
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Graduate Holographic principle responsible for life?
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Undergrad How do we determine what's in the core of stars/planets?
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Graduate Neutral electron gas in galaxy halo?
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Undergrad Uranium and supernovae explosions
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Graduate Another big numbers coincidence?
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Graduate First 3D Map of Dark Matter in the Universe
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Graduate Creating a Realistic Virtual Universe: An Astrophysics Problem
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Undergrad Discovering Medieval Cosmology: A Public Health Student's Perspective
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Astronomy Olympiad: Questions & Discussion
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Energy and matter Is that all that fills our universe?
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Undergrad Are hotter stars always brighter?
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Graduate Nobel Prize in Physics 2006 (Mather and Smoot)
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Undergrad The speed of light and the expansion of the universe
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Graduate Is Our Consciousness Immortal Through Multiple Universes?
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Graduate Equation for Solid Planet Structure
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High School Round trip to earth in a straight line?
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Graduate Is the Hyperboloid Model Truly Homogeneous and Isotropic?
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What is the identity of the enigmatic I in this timeless puzzle?
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Undergrad How do we really know the universe is expanding?
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High School Sun's Polar Shift on 2012 coincidence?
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Graduate Multiverse theory, where are they?
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High School Star Density Should be a piece of cake
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Graduate Can Any Theory Unify Wave/Particle, Space/Time, and Energy/Mass Dualities?
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Undergrad Critical Density: What is the Energy Density of the Universe?
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High School Birght comets like Comet McNaught
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Undergrad Experiment with multiple instrument places all over the earth
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Undergrad Calculating Solar Constant at Sunset: How Much Energy Will Be Received?
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Graduate Best fit three-sphere radius 130 gly (after Ned Wright)
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High School Parallax Questions: Confirm Answers are Right?
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Graduate What are some good reference materials for my dark matter presentation?
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Undergrad Does Andromeda contain dark matter?
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Undergrad Space Wars: US Plans for Dominance and Monopolization
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Graduate Inflationary vacuum and the true vacuum
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Graduate Light/ universe questions from a layman
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Graduate Two identcal spiral galaxies A and B w/ equal & opposite momenta merge
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Explore the Universe with an Astrophysics Simulator - Download Now!
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Graduate Is the Universe Really Expanding?
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Graduate FRW from spaces of constant cuvature
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Graduate Anyone Else Deep in Cosmology Code?
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Comet McNaught: The Brightest in History?
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Graduate Question concerning the universe & the Hubble photos
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High School How Long Does It Take To Orbit Our Galaxy
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Undergrad Is a Sunshade the Solution for Earth's Drought and Heat?
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Undergrad Red Shifts and the expanding universe
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High School Discover Earth's Orbital Velocities at Perihelion and Aphelion
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Graduate Explaining the structure of Galaxy Filaments
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Graduate Is a Planet-Dissolving Chaos Cloud Really Headed Towards Earth?
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Undergrad AIG Answers in Genesis: Challenging the Big Bang Theory
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High School Why Does a Planet Rotate and What Factors Influence Its Angle of Rotation?
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High School What's the farthest distance a star visible to the naked eye can still be seen?
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Undergrad Mapping 21cm Neutral Hydrogen with Radio Telescope
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Graduate Entertain an idea from an ignorant student for a minute
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Graduate What can weak lensing be used for?
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Graduate Nucleosynthesis and Hubble expansion
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Undergrad Searching for Intelligent Life: Understanding Radio Wave Filters
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Graduate Is the gravitational binding energy formula different for stars and galaxies?
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Graduate Black holes, can we see them directly?
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Graduate Two black holes separated by more than one Schwarzschild radii
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Graduate Cosmological geometries that may function as blackbodies
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