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 Entropy of Cosmological Event Horizon
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Graduate Andromeda 5x bigger than previously thought.
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Graduate Do the L4 and L5 points travel in a geodesic?
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Graduate Is the Three-Body Problem Unsolvable?
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Where Can I Find Dates and Locations of Future Solar Eclipses?
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Stargazing Leaving Telescope Out: Pros & Cons
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Undergrad Why Is the Night Sky Dark If the Universe Is Infinite?
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Graduate Universe Was Born in a Black Hole?
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High School Mystery of the Bright Green Meteor: Is it Common?
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Graduate Gravity leaving a permanent indention?
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Stargazing High-Altitude Floating Space Telescope
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Graduate The universe should be billions of times brighter than the Milky Way?
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Graduate SO(10) -> SU(3) x SU(2) x U(1) -inflation?
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Graduate Reaching Other Stars, Colonizing Planets
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Graduate Why is a blackhole a one way ride
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Graduate Is the Concept of a Self-Replicating Unmanned Spacecraft Feasible?
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Undergrad Ratio of Orbital Distance to Transit Time
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High School What is Gravity? Understanding Its Role in Universe Formation
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Graduate Evidence for a flat universe vs. circular logic
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Undergrad Why Don't Black Holes Absorb Hawking Radiation?
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Undergrad Unraveling the Mysteries of Jupiter's Auroras
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Graduate Where Can I Find Tutorials on Orbital Elements Perturbations?
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Graduate Calculating the Radius of a Neutron Star
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High School Theories and the begining of universe
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Graduate White Dwarf + Hydrogen Gas: Can It Revive Fusion?
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Undergrad Where should I begin with Astrophysics?
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High School The Sun Exploding: Effects on Earth
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Undergrad Finding the Exact Time of Alignment of Earth, Sun and Center Sun
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High School Season Indicators: Know When Seasons Start & End
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Graduate What Are the Least Researched Topics in Observational Astrophysics?
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Undergrad What Factors Affect the Color of a Star from Earth?
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Undergrad Can Gravity Explain the Tilt of Mars and Neptune?
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High School How Can I Identify Constellations in the Night Sky?
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Graduate How does the cosmological event horizon change the matter density?
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Undergrad Speed of Gravity: Is It As Fast As Light?
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High School What Are Tidal Forces and How Do They Affect Different Bodies?
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Undergrad Why Symmetry of Tides on Earth (influenced by moon, sun)
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Discover Top Reference Books for Studying the Sun | Nitya's Book Recommendations
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Graduate Mysteries of White Dwarf Formation: Massive Diamonds Inside?
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Undergrad Where Can I Find a Comprehensive Database of Supernovae?
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High School Find the error in this paragraph about physics
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The Way Back to Your Universe Test
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Undergrad Siobhan Morgan's cosmology calculator has a new url
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High School Coordinate conversion calculator
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Graduate Could Parallel Universes Be Created by Colliding Branes?
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Undergrad How do we know how much hydrogen the sun has?
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Water Flows on Mars: What We Make of This Article
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High School .Is Water on Mars? Colonization: Frozen or Sent Men?
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High School Are There Infinite Earths in Infinite Space?
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Undergrad Space Exploration and its effect on the Earth's Oxygen supply: I have a question
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Graduate Relativistic effects on interior of our sun?
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High School Just a little question on orbits.
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MySpace Group Hacked And Deleted
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Undergrad How does gravity affect rotation?
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Undergrad Random MOND theory / dark matter question(possibly really easy to answer)
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Graduate Understanding Friedmann Equations Equation of State: Step-by-Step Walkthrough
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Undergrad How can a star turn into a black hole, with the law of conservation of mass?
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Stargazing Fixing Vertical Flipping in Prismatic Telescopes: A Troubleshooting Guide
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Undergrad Why does Jupiter have more gravity than its density should allow?
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Graduate Questions on the Movement of Stars
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Undergrad Do hypernova events really exist, is there any proof for one existing?
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Graduate End of the Sky: Is There a Limit?
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Graduate Is Carlos Barcelo's Research Redefining Cosmology and Gravity?
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Graduate Can we hit black hole's surface without dying?
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Graduate White Dwarf Radii: Minimizing Total Energy
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Graduate What effects do the collision of galaxies have on the solar system?
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High School Understanding Kepler's Laws and Parallax in Astronomy
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Graduate Dark Matter Evidence: Baryonic & Non-Baryonic
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Graduate Why Doesn't This Black Hole Emit X-rays?
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Graduate Is the Axis of Evil still a valid feature in the CMB data?
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Graduate Could Multiple Stars Be Hiding in Eta Carinae's Nebula?
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Graduate Help wanted with accelerated expansion and gr
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Graduate Why Is the Chandrasekhar Limit Estimated with Unrealistic Assumptions?
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Stargazing First up is M13, 20 exposures of 30 seconds
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Graduate Scientific explanation of the Universe
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Graduate Does G vary because of Mach's Principle?
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Graduate How Do Upcoming Surveys Constrain Cosmological Models and Dark Energy?
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Stargazing Telescope Advice for Military Employee in Middle East - $1000 - $2000
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Graduate Can Photons Emit Gravitons in the Absence of Black Holes?
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Undergrad Last edited by a moderator: May 2, 2017
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Graduate What would happen if two black holes collided?
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Undergrad Uncovering the Composition of Space: A Scientific Explanation
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Undergrad Are Black Holes Universal Recycling Bins?
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Graduate The Possibility of Curved Spacetime, Black Holes, and Big Bang. .
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High School Far Side of Sun: Can Satellites View Opposite Side?
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Graduate WMAP and Big Crunch: Is the Universe's Fate Sealed?
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Graduate Can science and technology give us complete control over the universe?
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Graduate Exploring Binary Pulsar Mechanics: Lagrangian Formulations
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Graduate Can Black Holes Transfer Matter Between Universes?
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Undergrad If Saturn floats, then what happens?
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Undergrad Discover the Hubble Ultra Deep Field: Deepest Portrait of the Visible Universe
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Graduate Is Dark Energy Consistent with a Cosmological Constant?
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Graduate So what's the currently accepted gravity theory?
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Undergrad Galaxy defy Kepler? True or bull?
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Astronomy Song Game - Get Creative!
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High School Converting parsecs to Mega-parsecs
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Graduate Big Rip Red Sky? - Universe's Fate Explored
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Graduate Is Order at the Edge of Chaos a Valid Explanation for the Universe's Operation?
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Graduate What is the relationship between gravity and dark energy in black holes?
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Graduate Dark Energy Discoevery [NASA Teleconference 16 Nov]
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