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.
High School Chemical composition of relativistic neutron star jets?
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Graduate Mass/Energy of Relativistic Jets?
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Graduate How Much Mass Is Ejected in Polar Jets?
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Undergrad Is Information Conserved in the Universe?
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High School Detecting Unusual Stellar Shapes: Looking for Perturbed Planets
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Stargazing New Large Sunspot coming into view
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Undergrad Aurora on Uranus? Why Are They In Large Dots?
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Undergrad Is Probability Meaningless in an Infinite Universe?
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Graduate Is Solar Wind Formed by Planetary Resonance and Solar Cycles?
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Undergrad See How Andromeda Would Look if It Were Brighter
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High School Shouldn't dwarf planets be a subset of planets?
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High School Super-luminous Sphere Fading: Will Smaller or Larger Spheres Fade Away First?
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Undergrad Physics in a universe with instant communication
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High School Why are we still limited in our Moon exploration ambitions?
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High School Why does the moon appear to rock back and forth in the sky?
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Undergrad Position and Velocity in Heliocentric Ecliptic Coordinates
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Undergrad Expansion of the universe, a poor choice of words?
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Graduate Two Black Holes' collision thought experiment
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Undergrad Understanding Etherington's reciprocity theorem
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High School Are galaxies part of constellations?
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Undergrad Mathematical Proof of Kepler's First Law of Orbits
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High School Does Time Reverse Inside a Black Hole's Event Horizon?
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Undergrad How Does Dark Matter Density Affect Galactic Rotation?
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Graduate Viewpoint: Black Holes Produce Complexity Fastest
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Undergrad How to calculate day length of a tidelocked double planet?
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Undergrad Horizon Riddle (Infinite Horizon Problem)
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High School Why doesn't the Moon get pulled into the Earth?
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High School How Much Should You Spend on a Moon Filter?
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Undergrad Pluto's interaction with solar wind
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Graduate The Big Rip - new evidence for it?
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High School At what point would we stop seeing a star?
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Stargazing Large Sunspot Visible: See it Now for 3-4 Days - 13 Apr 2016
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Graduate Will this setup work for backyard photometry?
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Undergrad The universe doesn't have volume from outside?
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Undergrad New light shed on birth of the universe
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Kid Didn't Discover Lost Mayan City via Astronomy After All
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Undergrad How Will Nano Spacecraft Reach Alpha Centauri?
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Undergrad Space Debris: Questions from a Newbie
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Undergrad Does positive curvature disprove eternal inflation?
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Undergrad Discovery of how to measure wavelength absorption lines
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Graduate How do we say that the universe we live is 3 dimensional?
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High School How to apply Einstein's STOR to expansion
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Undergrad How Small Can a Mass Be Squeezed?
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Undergrad Size of Universe: Exploring 13.7bn Years of Space
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High School What are the name and function of this apparatus
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High School What do you call rocks that don't orbit the sun?
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Graduate Is there proof that black holes really exist?
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Stargazing Did You Catch These Amazing Stargazing Moments This Weekend?
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Graduate Rotational universe without dark energy and dark matter?
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High School Is the Universe a Type of Fluid?
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High School What are the biggest misconceptions about black holes?
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High School "Without Earth's atmosphere, cosmic rays would be lethal"
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High School Calculating Orbital Velocity in 2D
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High School Kepler Telescope Running in Safe Mode
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High School Expanding from and eventually to a singularity?
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Undergrad Gravity assist and increasing orbital energy
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High School Did Stars Precede Life in the Universe?
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High School Gravitational Collapse: Internal Energy & Potential Energy
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Undergrad Plotting number of halos per logarithmic bin
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Undergrad Could it be so easy? (Why is space three-dimensional?)
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High School Potential Organism Sustaining Planets
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High School Hubble equation function of time
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Undergrad Where Can I Compare Star Spectra?
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Undergrad Spacetime expansion and conservation of energy
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Undergrad Experiment to Determine if Spacetime is Granular
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High School How to contain an atmosphere in space?
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High School Does a magnetic field accompany Jupiter's Great Red Spot?
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Undergrad Inflation assumes ##\ddot{a}<0## after inflation?
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Tyson Says It's 'Very Likely' The Universe Is a Simulation
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Undergrad Spatial homogeneity and the functional form of two-point functions
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Undergrad Evidence to support the theory of stellar nucleosynthesis?
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Undergrad Understanding Wiki's Milky Way Galaxy rotation chart
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Undergrad Hawking radiation and energy-negative energy pair production
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Undergrad What differentiates inflationary models from each other?
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High School Is expansion caused by unknown tension in space/time?
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Undergrad Comparing Earth's diameter with Moon's diameter
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Graduate Uncovering the Mysteries of Dark Matter's Energy Content
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Undergrad Star Radius & Mass from Spectral Class, B-V, Luminosity
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Undergrad Calculation of mean energy value of photons in recombination
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Undergrad Exponential expansion of inflation
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Undergrad How can I calculate red shift for intragalactic bodies
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High School How Can I Improve Pointing and Eyepiece Quality on My Dobsonian Telescope?
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High School How much of the visible universe have we explored?
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Undergrad Is the influence of dark matter symmetric?
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Graduate April 23rd Magnetosphere Anomaly
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High School Is the Big Bang a Result of a Spontaneous Singularity?
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Graduate Mars as Second Earth: Slowing Down Its Orbit
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Undergrad Flat vs Open Universe: CMBR & Type Ia Supernovae
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Undergrad Could "reverse entropy stars" exist in our universe?
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Undergrad How Do We Measure the First Second of the Universe?
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Undergrad Does Space Compressibility Affect the Big Bang?
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High School What is the source of the mysterious red rectangle in space?
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Undergrad Meteor impact and axial tilt, relation to climate
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High School Universe Expansion: Is Earth Spinning Away From Sun?
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High School Fermi Paradox: What are your opinions on the Fermi Paradox?
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High School I've done it the wrong way roundn
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High School Voyager 1 - image of 'Pale Blue Dot'
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High School How do physicist determine the energy of the universe?
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High School Is Earth's Movement Away from the Sun Impacting Global Warming?
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Undergrad What does cosmological redshift do to light
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