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.
Undergrad Why is space so afraid of matter?
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Undergrad How can the small angle formula be used to measure the physical size of a star?
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High School Can Planets Be Juggled Between Binary Stars?
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Graduate Understanding the Three Body Problem in Space
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Graduate Scaling Cosmologies: Solving the Coincidence Problem
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Military Covering up Fireballs from Space
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Undergrad How would a man on earth appear from outer space
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Undergrad Interstellar Gas & Dust, Densities & Temperatures
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Stargazing Is a .1MHz RF Choke Necessary for the Itty Bitty Radio Telescope?
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High School Why is there no atmosphere on moon
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Graduate Is Betelgeuse Already a Supernova?
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Graduate Question About Derivative Notation
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Is the Alternate Big Bang Theory Supported by Scientific Evidence?
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Graduate Link White hole and our Universe
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Graduate Gravitational Lensing: Accretion Discs Around Black Holes
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Undergrad A beginner's question re: size of universe
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Graduate Raisin pudding or balloon at LHC
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Graduate Wolfgang Rindler: Godel's Remarkable Excursion into Cosmology
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Graduate Inflation: Why all the 10^27s everywhere?
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Graduate Can We Really Observe White Holes, or Do They Only Exist Mathematically?
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Graduate Measuring Black Hole Gravity with a Laser
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Graduate Massive M87 Black Hole Discovered with Supercomputer
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Undergrad Can Someone Help Me Rearrange This Astrophysics Equation?
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Naming Stars: A Scam or Legitimate Organization?
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Graduate Does time dilation cause redshift?
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Graduate Fundamental parameter probabilities
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Graduate Inflationary Models: A Dead End?
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The universe 700 trillion light years away.
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High School What is the gravitational acceleration on Earth's surface?
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High School Liquid ocean in Uranus and Neptune
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Graduate Matter and Antimatter: Why Did Matter Dominate?
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Undergrad Is there any formula to calculate the effect gravity has on time
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Graduate Is the Hubble Age Estimate Really Accurate?
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Graduate How Do Black Holes Emit Radio Waves if They Only Suck Things In?
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Undergrad Solar Wind's Effect on other Planets
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Graduate Scale of inflation and dark energy
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Graduate Alternate universe attractive/repeling force?
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Can Penguin Poop Really Be Seen from Space?
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Has anyone not seen Google sky? What did you think?
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High School Can we see our own galaxy out there due to gravitational effects?
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How can I tell if the night sky is observable from here?
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Undergrad What Do You Need to Know About Star Clustering Research?
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Graduate What Are the Implications of Ignoring Pre-Big Bang Events?
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Graduate Understanding Superluminal Jets and Accretion Emissions from Black Holes
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High School Comet Tails: A Mystery of Solar Forces
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High School Gaining Understanding of Force for Launching a Rocket/Satellite into Space
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Graduate Does the Expansion of the Universe Defy the Law of Conservation of Energy?
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Graduate Evidence for dark energy equation of state paramater w = -1
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Graduate Size of the *observable* universe (noob questions about)
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Undergrad Galaxies receeding at and above speed of light
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High School Is a KBO the Size of Mars Considered a Planet?
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Graduate What Makes Supernova 2008ha Unique and How Did a 14-Year-Old Discover It?
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Undergrad How long until the Sun becomes a black dwarf?
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High School Gravity & Satellites: Moon's Influence on Earth Satellites
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Graduate Derivation of (linearized) perturbation equations
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Undergrad Exoplanets seem all to have elliptical orbits
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Math is Hard - the Aerospace Engineer
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Graduate Comparing data sets of different size
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Challenging Claims of Proof for Evolution: The Scientific Perspective
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Graduate What happens to a light beam in a flat universe with finite size?
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Graduate Proof of the curvature of space-time?
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Graduate Derive flight path angle from orbital elements
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Graduate Detecting Anti-Matter: Can We Tell?
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Graduate Accounting for Cosmological Expansion in Distance Measurements
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Episode of The Universe (WMAP)
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Undergrad Solar Coraona, Photosphere, and temperture
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Undergrad How Did Planets Enter Their Orbits?
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Graduate What is time and how does it affect our perception of space and light?
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Undergrad Size Limit of Comets: Understanding Kepler's Laws
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Graduate Thick-Skinned Gravastars Vie to Replace Black Holes, in Theory
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Graduate What stops a star from fusing all its fuel at once?
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Graduate Does Acceleration Affect a Distant Observer's Perception?
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Graduate Does Flat Space Exist in the Context of General Relativity?
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Graduate I don't like Dark Matter and Dark Energy
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Graduate Calculating Celestial Coordinates
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Undergrad Distance to stars from my house using the parallax technique?
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Graduate Can You Determine the Center of Mass Distance Using Instantaneous Orbital Data?
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High School Do Planets Orbit Closer to the Sun Over Time?
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Graduate How is the Proton to Neutron Ratio Calculated After the Big Bang?
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Graduate Can Black Holes Bend Light and Act as a Time Machine?
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Graduate Slowing time or expanding space?
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Graduate Evaluating distance of far objects in space
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Undergrad The origins of universe and development
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Undergrad What Gases Are Present in Dwarf Planets and Kuiper Belt Objects?
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High School Distance analogy - am I being accurate?
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Graduate Can Non-Cosmological Redshifts Explain Anomalies in Galaxy Interactions?
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Graduate Seeing Back to the Big Bang: Is it Possible?
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High School Size of the Universe is 13.7 billion light years?
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Graduate A question about Friedmann Equations
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Graduate Do the cosmological expansion affect binding systems
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Graduate Misconceptions about expanding space
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High School Zodiac Constellations: Sun's Path Through the Year
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Graduate Effective weight of a star's layers
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Undergrad CAMB Output File: TT Power Spectrum (C_l) Columns
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Graduate Superluminal Jets: 6c Speeds Detected!
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Undergrad EMwave in space and copper wire.
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Graduate What happens to a 0.7 solar mass star when it comes off the main sequence?
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Graduate Alien Maps of an Ocean-Bearing World
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CD player as a gyroscope in space
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High School Outer space where there was no gravity
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