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 How do we explain universal complexities?
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High School When to see aurora borealis in Lincoln, NE?
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Undergrad Average size of the biggest G-bound structures in the Universe
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High School 'Strong signal' from sun-like star sparks alien speculation
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High School Does water pressure decrease in zero gravity?
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Undergrad Lunar versus Solar orbit at solstices
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Undergrad Need help with some calculations with gravitational waves
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Graduate New Radial Velocity Experiment (RAVE) Data Release
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Undergrad What would a universe look like if it had 2 time dimensions?
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High School What do you think of the "Now Hypothesis"?
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Graduate Did the LUX Dark Matter Experiment Fail to Detect Dark Matter?
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Graduate How much energy to fly Spaceships from sci -fi movies
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High School Graph of rotation curve of a cluster (not a galaxy)
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High School Astrophysics Science Fair Project Ideas?
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Graduate Motivation behind the theory of cosmological perturbations
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Undergrad What's the feasibility of space mining companies?
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Graduate Quantum fluctuations in early universe
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High School What is the initial temperature of the Big Bang?
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Graduate Photon densities within galtactic disc compared to CMB
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High School Delta-v for orbit if already at ideal velocity and altitude?
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Stargazing H.E.S.S. gamma ray telescope got an image of the moon
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Undergrad Why are stars grouped in galaxies?
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High School Unraveling the Mystery of Hydrogen Times Pi Frequency
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Undergrad How to Calculate Longitude and Latitude Speed from Cartesian Values?
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Stargazing Amateur Astrography: Stitching Together Large Fields of View
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Undergrad Planetary Orbits in AU - Stability & Mass Limits
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High School Explaining the Color Variations of Main Sequence Stars
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Stargazing Can a Planet Have Multiple Moons with Unique Orbital Patterns?
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High School Aerogel comet particle capture experiment?
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Insights A Poor Man's CMB Primer. Part 4: Cosmic Acoustics - Comments
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High School What is the total size of the Asteroid Belt in kilometers?
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High School Simulating orbit trajectory based on position and velocity
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Undergrad Does LQC Resolve the Information Paradox Without Complementarity?
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High School What came first, matter or energy?
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Graduate Can Time Scale Change Analogously to Spatial Expansion?
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Undergrad What is the average number of planets per star?
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High School Fact check: Planetary collisions
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Undergrad Spacetime and effects of being super close to the Sun
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Stargazing Processor power for entry level Astrophotography
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Undergrad Scale invariance in the power spectrum
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High School Can Non-Rigid Spacesuits Provide Adequate Protection for Space Travel?
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High School Capturing a distant planet's light
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Graduate Newtonian theory of cosmological perturbations
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Graduate Cosmological perturbations in homogeneous and isotropic spac
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Stargazing GAIA - 1 billion stars and counting
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Graduate Can black holes convert matter/dark matter?
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High School Regression of Universe: Is Time Repeatable?
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Undergrad How to determine a planet's size given gravity
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Undergrad How does the expansion of space affect the age of the universe?
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Graduate Exploring the Pauli Exclusion Principle and Black Holes
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High School Why is planet X always depicted as being blue?
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Undergrad How to derive full solar sprectrum from gamma rays
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High School Van Allen Belt "mirror points"-- How do these work?
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Undergrad Intergalactic Space: Time, Radiation & Distance
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High School What is the significance of the spooky alignment among quasars?
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Graduate Gravitational Lensing: Einstein's Blue Run Mystery
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Undergrad How can I find journals about this discovery?
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Undergrad Can Gravitational Lensing Be Caused by Refraction?
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High School Are There Really Hundreds of Black Holes in NGC 6101?
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High School Why Quantum loop or string theory
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High School Do we currently have interstellar com capabilities?
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Undergrad Is there a point during star formation when gas is 1 atm?
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High School Very close asteroid pass in a few hours
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High School How do stars orbit the center of the Milky Way?
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High School Gold Synthesis in Supernovae: What Form Does It Take and Under What Conditions?
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Undergrad How Big is a Planet with a 5000mph Rotation and a 52-Hour Day?
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High School When Did the First Stars in the Universe Form?
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High School What kind of supernova do binary neutron stars produce?
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High School Why Do Stars Show Both Emission and Absorption Spectra?
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Undergrad Calculating distance, object speed, etc - RE:Falcon9
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Undergrad If radiowaves are reflected from objects (i.e planets)....
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Undergrad Difference between omega 0 and omega k
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Undergrad Is an integral over phase space reasonable?
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High School View Zodiacal Light Before Morning Twilight - Prime Season Now!
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Undergrad Early opaque universe - why little proton-photon scattering?
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High School Solar Energy at Mars: How Much Can Be Produced?
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High School Can we know what exists in planets' subsurfaces?
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Stargazing The Pleiades: an underrated glory of the night sky
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High School Could dark matter be regular matter?
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High School What is the next step in cosmology
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Undergrad Hawking Radiation: Explaining the Evaporation Effect
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Graduate What Lies Between the CMB and the First Stars?
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Stargazing How Does Hubble's Field of View Compare to Amateur Telescopes?
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Undergrad Trying to solve the restricted two-body problem
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Stargazing Kepler Telescope Views Single Point in Space 4.2ly Away
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Graduate Shape of the Universe: Is it Infinite or Finite?
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Undergrad Constants of nature in the early universe
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Undergrad Are Cosmic Rays Intensifying Across the Globe?
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Undergrad Why does hawking radiation in black holes slowly increase?
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Undergrad Moon revolution period 27.32, but got 27.53 from equation?
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Undergrad If the observable universe was visible to the naked eye....
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Undergrad Physical Significance of Eccentricity & Semi-Latus Rectum of Orbital Ellipse
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Graduate Exact solutions of quintessence models of dark energy
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High School Can the space (or else measurable) be actually infinite?
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High School What cancel the quantum contributions in Cosmological Const?
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Undergrad Density of matter in the expanding Universe
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Undergrad "Moment of Inertia" in Virial Theorem
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High School What is beyond the edge of the universe?
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High School The universe is shrunk a little bit more than we thought
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High School What does a black hole look like from the inside?
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