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 What Are the Key Experiments for Investigating Redshift Anomalies?
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Graduate Why Isn't the Entire Universe a Black Hole Despite the Big Bang Singularity?
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Undergrad Calculate the equatorial rotation velocity
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Undergrad Kepler's 3rd law - which object in numerator?
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Graduate Is the Expansion of the Universe Accelerating Beyond the Speed of Light?
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Undergrad Do planets wave in their orbits?
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Graduate Would a Universe be considered part of the standard model?
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Graduate Is Gravitational Energy Truly Negative in a Zero-Energy Universe?
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Graduate Inflation, as a tool for supersymmetry breaking
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Undergrad Astronomy paper help - professor doesn't understand my wording
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High School Solar system is bigger than previously thought
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Graduate Could You Have Spotted the TanDEM-X Satellites Near Saturn?
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High School Can you recommend any resources for Astronomy?
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Graduate Questions on observational cosmology
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High School Why doesn't the moon eventually drift into space?
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Graduate Earliest Rocky Planets: Timeframe & Info
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Graduate Travel to another moon/planet/gravitational body
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Graduate What is the source of dark energy?
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High School Can We See If A Planet Is Inhabited 1 Million Lightyears away?
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Graduate How do Trojan Asteroids effect a planets' orbits
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Experience the Incredible Descent onto Titan: How Did They Do It?
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Graduate What is the fabric of the universe?
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Graduate Auroral Mechanism: Questions Answered
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Undergrad Looking for a good analogy of the shape of the expanding universe
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Third Van Allen Belt Discovered - NASA Probes
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Graduate Gravitino production in the early universe.
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Graduate What Are the Processes for Manufacturing Elements Heavier Than Iron in Stars?
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Undergrad C/2013 A1: Weight Estimation & Final Trajectory
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Graduate Universe older than thought? Or big bang theory wrong?
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High School How is one black hole is larger than another?
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High School Comets in the Northern Hemisphere vs the Southern?
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Graduate What are e-foldings and how are they used in various fields of study?
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Time Magazine: Dark Matter May Not Exist At All
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Graduate What happens when a black hole devours another black hole?
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Undergrad Why are MACHOs in the Halo not the disk
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Graduate Opinion: Double Degeneracy Model for SN Ia Progenitors
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Graduate What is the significance of the Jeans length in cloud collapse?
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Undergrad When did nuclear fusion in the sun really start ?
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Undergrad Help Solve Supernova Assignment | Astro Community
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Graduate Life in Vastly Different Universes
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High School ~12mm EP and a barlow or just one good ~6mm EP
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Undergrad Which Celestial Body in the Solar System Allows a Probe to Orbit Fastest?
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High School What are the best eyepieces for my new Orion XT8 telescope?
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Undergrad Discovering Exoplanets: The Benefits of Studying White Dwarfs
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High School How close does a spacecraft get to Tethys during a mission?
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High School Why doesn't light travel infinitely fast ?
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Undergrad Accelerating Universe: Stephen Hawking, Carl Sagan, Arthur C. Clarke
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Graduate Probability of stars in a multiverse
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Graduate Is There Evidence for the Universe's Expansion and a Constant Speed of Light?
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High School Is Andromeda Really the Nearest Galaxy to the Milky Way?
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Graduate Rotation speed of a neutron star
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Undergrad Does the Universe have a Frame Rate ?
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Graduate Can We See Our Own Solar System Through Gravity's Mirror?
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Stargazing Is it possible to clean a telescope mirror?
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High School What Determines Planetary Speeds?
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Graduate Will water or lava freeze in space, or would it be a gas?
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Undergrad Why does air rush in from colder to hotter space and not vice versa?
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Graduate Is there a limit to the universe's expansion?
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Graduate Before Inflation: Elementary Particles Q&A
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Graduate Thermal velocity of particles in the solar corona
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Undergrad Earth as Moon of Gas Giant: Effects on Sunlight?
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Undergrad Easy steps to groom TabCosmo output for PF post format
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Graduate Higgs Boson Particle: Doom for the Universe?
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Graduate Orbiting the Sun beyond the Hill sphere
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Graduate Age versus Size of the Universe
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Graduate Inflaton after chaotic inflation
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What Are the Largest Structures in Our Universe?
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Unlock the Mystery: Dark Matter Discovery
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Graduate How precise can Doppler shift be measured in detecting exo-planets?
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Graduate Big Bang & Entropy: Proof & Theories Explained
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Graduate Combining estimated errors (galaxy properties, observational)
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Stargazing Help is needed in understanding my telescope
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High School Percentage of stars that become black holes
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Graduate Can matter focus neutrinos in a supernova event?
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Undergrad Creating a Equation to Destroy the Sun
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Graduate A way to ripple the fabric of space?
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High School Geminid meteor goes the wrong way.
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Graduate Thoughts and questions about the CMBR.
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Graduate The farthest matter we will ever hear from
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Undergrad Question about Expansion Speed exceeding Ligth Speed
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Undergrad Chelyabinsk Meteor Shockwave 2/15/2013
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Graduate Curious about Black hole information paradox
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Undergrad Why did the Chelyabinsk Meteor Explode?
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Undergrad Star collapse to form directly a black hole
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Graduate Supernova remnants & neutron star
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Graduate Solution to the cosmological constant problem
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Graduate What do we know about Baryogenesis?
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Undergrad Does Jupiters moon Io exhibit plate tectonics?
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High School Is Russian meteor related to a asteroid known as 2012 DA14?
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Graduate Expanding Space-time and the active vaccuum.
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Graduate Nodal Precession Rates of Solar System Planets
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Graduate Inflation & Quasars energy and 'fast-forward effect' ?
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Graduate What is the difference between coasting and static cosmology?
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Graduate Is the Boltzmann Brain Paradox a valid explanation for our existence?
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Graduate How Will the Universe End?
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Stargazing Eyepiece for refractor telescope
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Graduate Questions arisen while reading Weinberg's Cosmology
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Undergrad Another perspective of the Drake Equation
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Undergrad Pulsars - Rotating neutron star produces EM radiation?
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Graduate Dark energy and dark matter as curvature effects?
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