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 Why do natural Moons revolve around planets?
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What is the A Grand Tour of the Universe video series about?
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Graduate The initial mass function (IMF) of main-sequence stars,
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High School Can We Use Silicon Oxide Bags to Fly to the Moon?
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Graduate Gravitational Collapse: How Long Does it Take?
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High School What Would We See When Traveling to a Star at Light Speed?
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A couple of new pix -- M42 and Eta Carina
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Graduate What lies beyond the edge of the universe?
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Undergrad Astrophysics Books by Frank Shu | Student Guide
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Undergrad Heat and Magnetism: How Does the Sun Maintain Its Magnetism?
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Graduate In depth Mars flight trajectory studies
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Graduate Can a singularity expand in volume?
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Graduate Did space time be created at the Big Bang?
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Graduate What is the Jeans Anomaly and How Does it Relate to the Birth of a Star?
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Graduate How to calculate the mass of a star using redshift?
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High School Gravity -- Does gravity depends on atmosphere?
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Graduate Heavy water mismatch between comet 67P and Earth's oceans
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Undergrad Space Hazards on ISS: How Much Is at Risk?
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High School Dawn distance to Ceres ≈ distance to moon
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Graduate Hypothetical Galactic Navigation System Question
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Graduate Giant ring system around exoplanet discovered
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Undergrad What would Kessler Syndrome really look like?
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Space Burial: A Futuristic Dream or a Possible Reality?
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Graduate Microbial mats traced in Mars sediment? Noffke's hypothesis
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Can Radio Telescopes Capture Detailed Images of Asteroids and Their Moons?
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Graduate Comets' High Deuterium-to-Hydrogen Ratios Explained
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Top Sky Viewing Apps for iPhone: A Comparison
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Graduate Confused about binary star systems?
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Will Dawn successfully enter orbit around Ceres?
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Undergrad Do Pulsars Really Produce Sounds or Are They Just Radio Wave Representations?
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Undergrad What is the definition of disc scalelength?
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Graduate What Happens to Gravity When an Object Travels at the Speed of Light?
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Undergrad Diameter of Earth-like planet / gravitational force
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Graduate Methods to find exoplanets more easily
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Graduate How to determine the mass of a planet using redshift?
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Undergrad How can you tell what kind of orbit a body will have?
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Graduate Can Weibel Instability Generate Cosmic Magnetic Fields?
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Graduate Modelling The Sun’s Magnetic Field
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Graduate What Makes a Black Hole a 'Hole' If It's a Point Mass?
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Undergrad What creates energy in a nova, supernova?
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Graduate Stability of Orbital Resonance Ratios
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Cosmology/QED/Astrophysics Lectures: Ideas Welcome!
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Graduate Does energy level determine the smallest region of spacetime that can be probed?
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Graduate Paradox on the Chandrasekhar Limit
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Graduate Earth-Like Planets & Iron: Questions Answered
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Graduate Why aren't there any space tugs in use?
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Stargazing How Can I Build a Telescope?
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Where Can I Find Comet Lovejoy in the Sky Right Now?
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High School Earth-Sun Distance: Perfect for Life?
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Undergrad Image reduction and analysis software for windows
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Graduate Diapl - Difference Image Analysis Package
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Graduate Making sense of distance and speed of expanding universe
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Graduate Quick help with equation P = a * T^4
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Graduate Differential equation for motion within stars
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Graduate What happens in the center of mass of binary star system ?
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Graduate How to estimate/calculate stellar wind from a star?
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Stargazing How Can I Build My Own Telescope Without a Tube?
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Graduate Apparent size of objects at cosmological distances
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Graduate What Factors Influence Radiation Production from Cosmic Ray Particles?
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Undergrad How do we accurately measure distances in space?
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Graduate Space Bending: Questions & Answers
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Undergrad Trying to understand black holes
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High School Jupiter gets up in Mercury's business - what happens next?
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Spectacular Spiral May Encircle Milky Way
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Graduate Is this evidence for a space-time continuum?
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Graduate Binary Star Inclination Angle probability distribution
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Graduate Depressurization in Space: Estimating Time and Effects of Meteor Penetration
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Graduate Dennis Overby article on Merging Black Holes
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Mercedes concept "mobile living space"
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Undergrad A question about Black Holes and their Gravity
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Graduate Gyrochronology: A Spin-Down Clock for Cool Stars
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Graduate What Secrets Does the Milky Way's Core Jet Reveal About Galactic Dynamics?
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High School Planetary motion as perpetual motion?
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How can I find the distance between Epsilon Indi and Tau Ceti?
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Undergrad Reading of planets billions of light years away
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Graduate Planetary orbit disruption by passing stars
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Graduate What new theories are being proposed to explain the beginning of the universe?
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Graduate How the last days look like just before a tidal lock?
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Graduate Forming Strange Quarks in Strange Stars
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Undergrad Converting/Creating Coordinate Systems for Other Planets?
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Graduate Can someone check my work for this problem I thought of?
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Graduate What is the value of k in the Moon's orbital precession?
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High School Best way to see Andromeda galaxy
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Undergrad Do tidal forces slowly make orbits more circular?
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Undergrad Discover the Spectacular Sky Color on a K4.5V Main Sequence Star"
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Graduate Mass Inflation Instability in Kerr and Reisnerr black holes.
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Graduate How Do You Calculate the Correct Launch Window for an Inclined Orbit Around Io?
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Undergrad Simulating Planetary Collisions: Outcomes & Results
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Graduate Calculate Sun and Moon Astronomical Parameters with VSOP87 Accuracy
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Graduate On the mathematics of interstellar colonization
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Undergrad Can i create a star from Jupiter?
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High School Why Equator only exists for a rotating body like Earth?
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Graduate Pandora (Borderlands): Is this planet possible?
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High School Revolution of Planets: Rotation & Revolving Around Stars
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Graduate Where did Schwarzschild get his information for his black hole model?
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Graduate How can superconductors be used to protect spaceships from radiation in space?
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Graduate Neutron Star Collapse: Q&A on Physics and Observation
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Graduate Creation of spinning neutron stars and pulsars
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Graduate Gravitational Interferometer and Kalman
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Graduate Planets collapsing into black holes?
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