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.
I Neutron Star Stability: Speed of Sound vs Light
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I Seeing the Martian moons with a pair of $60 binoculars
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I How ancient found that sun is too far from earth?
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I Sun and hydrostatic equilibrium
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A Must Planetary Systems Have Retrograde Orbit Planets?
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I Disequilibrium of the solar system
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I Why does temperature always rise in stars?
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I The cold interior of the Sun seen in a sun spot
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When Will Preliminary Gaia Data Be Released?
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B Could We Colonize Mercury Using Sunshades and Heat Shields?
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B How did direct collapsing black holes form so early in the universe?
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B How exactly do SMBHs in the center of galaxies form
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A Nature of radiation emanating from a body v/s frequency
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B Orbital parameters of stars orbiting Sagittarius A*
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I Are Black Holes Truly 3D Phenomena?
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I How to define the rotation of a planet in retograde orbit?
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B How far from the core is the photosphere/chromosphere?
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B ASTRO-H Failure Puts Promising Mission in Jeopardy | JAXA Update
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I Does the Universe have a centre, yes or no?
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I How well are orbital inclination oscillations known?
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B Aphelion: See Sun's Size Change Over Year on YouTube
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Stargazing New Radio Telescope is World's Largest
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B How can I do Astronomy from home?
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B Constructing Space Without Points: Agree/Disagree?
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B How does having long exposure help with distance in photos?
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I Seeking "simple" orbital path planning for game development
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I Can someone please explain to me Leavitt's law?
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B A new quasi-satellite was discovered in April: 2016 HO3
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Radius and Mass of an Unknown Planet
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Does Dark Energy follow the same rule as energy?
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I Light and our atmosphere (some quantum physics)
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B What exactly is L, Lz and E in orbital mechanics?
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Stargazing Deep Space Imaging and stacking images for less noise
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I Dark Matter: Can Gravitational Field Be Generated?
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B Quasars & Fusion: Could They Generate Energy from Fusion?
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I Why do we need "planetary equilibrium temperature"?
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B Is There a Limit to How Much Light Can Be Stretched Out in a Black Hole?
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I Youtube video about the sound of a pulsar
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Stargazing Is There More Than One Universe?
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A Charged black holes and charge balance in galaxies
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Stargazing The terrible distortions of the Hubble Telescope
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I Does Black Hole Evaporation Violate the Second Law of Thermodynamics?
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I Astronomical improvements needed to discover a ex-solar moon
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B Why Is the Sun Expanding & Getting Hotter?
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B LIGO detects second gravity waves
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A Stellar photosphere temperatures
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I How Do You Convert Parsecs to Arcminutes in Astrophysics?
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Stargazing Dealing with Dust and Condensation on Telescope Mirrors
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B Cosmological data margins of error
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I Understanding the Polar and Equatorial Temperature Differences on Planets
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What does Astrophysics/Astronomy mean to you?
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B What Happens to the Singularity Inside a Black Hole When It Evaporates?
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I Could Brown Dwarf Sub-Dwarf Companions Host Habitable Moons?
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B Zero degrees longitude on other planets
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Stargazing Can you me with this Hershel telescope beam?
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Stargazing Why Can't I See Anything Through My Newtonian Reflector Telescope?
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B Calculating distances with an elliptical orbit
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I What is the size of the observable universe relative to CMBR
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A Trapping the sun in a perfect insulator
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B What is the maximum lifespan of a B-class blue giant star?
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A On a Clear Day, at 6 ft tall, at the waters edge ....
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I Calculating semi-major axis and minimum mass of an exoplanet
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B Kepler's Laws of planetary motion
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I What Does MUV Mean in Astronomy? Understanding GN-z11 and its Redshift
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I How does mars have a magnetic field, with a cooled core?
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I The "real" reason why some galaxies are flat
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I How Many Einstein Rings Have Been Discovered?
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B What Are Love Numbers and How Do They Impact Tidal Deformations?
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B Jupiter Red Spot Position and more
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Light speed moving objects -- What would it look like?
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I Is the Oort Cloud Just Speculation or a Real Cosmic Structure?
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I Superconductors and spacetime question
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I Hubble finds universe may be expanding faster than expected
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B Equatorial platform: any experiences?
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B Does the moon rotate on its axis?
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B Are the axes of celestial objects parallel in a galaxy?
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B Are Larger Black Holes Less Dense Than Smaller Ones?
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B Is the formation of galaxy groups explained correctly here?
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How does the solar wind affect Earth's atmosphere?
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I What happens when tidal power runs out?
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Stargazing What is the difference between a type IIP and type IIL supernova?
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I GW150914 and GW150914-GBM revisited
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Stargazing A new and improved Eta Carina image
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I Is tangential velocity in elliptical orbits stable?
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Having Trouble with ISIS Image Subtraction Method?
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B Walking on a sheet of grippy fabric in space.
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I Closure Phase - Interferometry - Recurrence Relation
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B Mass in Space: Questions & Answers
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A Climate change and changes in astronomical viewing conditions....
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B CCD: How It Works & Intuitive Explanation
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B Chemical composition of relativistic neutron star jets?
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Mass/Energy of Relativistic Jets?
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A How Much Mass Is Ejected in Polar Jets?
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B Detecting Unusual Stellar Shapes: Looking for Perturbed Planets
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Stargazing New Large Sunspot coming into view
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I Aurora on Uranus? Why Are They In Large Dots?
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A Is Solar Wind Formed by Planetary Resonance and Solar Cycles?
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I See How Andromeda Would Look if It Were Brighter
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B Shouldn't dwarf planets be a subset of planets?
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B Why are we still limited in our Moon exploration ambitions?
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