Astronomy and Astrophysics Forum

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Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
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 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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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 Tolman surface brightness test -
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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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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 Creating a Realistic Virtual Universe: An Astrophysics Problem
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Astronomy Olympiad: Questions & Discussion
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Undergrad Are hotter stars always brighter?
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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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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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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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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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Undergrad Does Andromeda contain dark matter?
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Undergrad Space Wars: US Plans for Dominance and Monopolization
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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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Comet McNaught: The Brightest in History?
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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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High School Discover Earth's Orbital Velocities at Perihelion and Aphelion
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Graduate Is a Planet-Dissolving Chaos Cloud Really Headed Towards Earth?
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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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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 Is Speed Real and Who Has the Correct Frame of Reference in the Universe?
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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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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 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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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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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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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 Coordinate conversion calculator
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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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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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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 Can we hit black hole's surface without dying?
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Graduate White Dwarf Radii: Minimizing Total Energy
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