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.
Undergrad Moon's eccentricity, apogee and perigee
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Undergrad Formation of super-massive black holes
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Undergrad Is inflation needed to explain uniformity?
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High School Another Andromeda-Milky Way "collision" question
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Undergrad Gaia Space Telescope and Lagrangian Point 2
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Undergrad Sunlight refraction at sunset at different latitudes?
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Undergrad Why there is no disturbance in orbital paths?
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Undergrad Why Does the Sun Have an Orbital Period Like a Year?
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Undergrad Repurposing Satellites: Maximizing the Lifespan of Space Technology
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High School Ideas to protect the Earth from possible asteroid impacts
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Undergrad Why do we need to unify gravity with the other three forces?
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Undergrad Collision of Milky Way and Andromeda....?
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High School Standard candles in a stretching fabric of space
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Graduate How Long To 'FreeFall' Into TON 618 From ISCO
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High School Meaning of the Abbreviation CCH in Graphic
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Undergrad Calculating Velocity of a Ball in a Black Hole's Sphere of Influence
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High School Discover 4 Milky Way Arms: Older Galaxies?
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Undergrad Do trojan satellites follow migrating planets?
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Stargazing Best Telescopes for $1K: Mars, Planets & Night Sky Views
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High School Water - Where do you think it came from?
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Stargazing Australia's largest optical telescope
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High School Searching for the Ninth Planet: Solar System Migration
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Undergrad Why do transits of Mercury only occur in May & November?
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High School Interstellar Dust: What Blocks Light From Distant Galaxys?
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Undergrad Black holes with a naked singularity?
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High School Why most stars seem to rotate the same direction in a galaxy?
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High School Why doesn't the moon fall down if it's just a big rock?
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Graduate Is there any astro-field that uses QM or GR frequently?
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Undergrad If a planet struck the sun, would fragments be blasted out?
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High School Parallax Limitations: Measuring Distances Miles Away
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Undergrad Why isn't Mercury as red as Mars, even though it has more iron?
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Undergrad Would an exploded planet change earths orbit (see graphic)
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Stargazing What is the best Dobsonian telescope with a goto feature?
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Undergrad What factors determine the composition of a planet's atmosphere?
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Undergrad Compute the total stellar mass from a galaxy with Red Giants
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Undergrad Colliding black holes: when will linear acceleration end?
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Undergrad Restricted three body problem (numerical simulation of gravitational attraction)
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Undergrad Gravitational field in the galaxy and Schwarzschild´s time dilation
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Insights Calculating the Spin of Black Hole Sagittarius A* - Comments
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High School Is one side of the Earth faster at night and slower at daytime?
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High School Does galaxy formation conserve mass and angular momentum?
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Undergrad Redshift Along Galactic Plane: Study & Research
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Undergrad A steady-state solution for the flow in the Boussineq approximation in a star
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Stargazing Telescope recommendations for watching a galaxy?
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Undergrad A question about a popular example of expansion
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High School Expanding Universe - Could It Be Rotating?
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Stargazing Comet 46P/Wirtanen Visible to Naked Eye Dec 16
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Undergrad Rotation profile for radiative zone of Sun - convection
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High School Does everything in space have or inherit inertia?
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High School Can Black Holes Be Annihilated?
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Undergrad Solar spectral intensity per wavelength - frequency
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Stargazing What is the likelihood of another solar grand minimum occurring soon?
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High School When light arrives at the end of space, what happens?
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Undergrad Does Planet Mass Affect Orbital Period?
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High School What is the Correct Formula for Calculating the Velocity of Saturn's Rings?
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High School Does the Path of an Interstellar Object Curve Due to Solar System Movements?
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High School Ratio of Earth-Sized exoplanets to other sizes of exoplanet?
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Undergrad Measuring the Effects of Dark Energy on Bound Objects: An Experimental Study
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Undergrad Were Population III stars powered entirely by p-p fusion?
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Undergrad Solid diprotium saturated vapour density
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Stargazing Possibility of small bodies of liquid etc
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Graduate Is Dark Matter a Dead End in Physics?
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High School No low-frequency emission from Fast Radio Bursts
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High School Does dark matter interact with Baryons?
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Undergrad A little doubt regarding specific angular momentum
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Undergrad Force as a function of time/space
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Graduate Do vacuum Ironing boards cause negative pressure in my Space
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High School IB Extended Essay in Astrophysics
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High School Barnard's Star, 6 Light-Years Away, May Have Cold SuperEarth
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Stargazing Southern hemisphere flickering orange/green star
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High School Parallel Spacetimes: Matter & Antimatter Separated?
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Undergrad Hypatia, Elliptic orbits, conic sections
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Graduate How to calculate Saturn's mass from Kepler's third law?
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High School Magnetospheric eternally collapsing objects
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Undergrad Merging Neutron Stars: What We Know So Far
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Undergrad Calculating the Sun's core temperature?
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High School Was the universe is infinitely large at the big bang?
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Graduate Accretion rate onto a WD over time (relation)
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Undergrad Why Is Jupiter's Surface Gravity Not as High as Expected?
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High School Why Doesn't Earth's Strong Gravity Crush Everything on Its Surface?
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High School When a star exhausted it's nuclear fuel
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Undergrad Gravity and how it starts and stops
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High School What does it mean to say that "space" has a temperature?
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Undergrad Core collapse of a supernova: the "void" left by the collapsed core?
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Undergrad What areas of nano/optical research applies to astrophysics?
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Undergrad Understanding Gunn-Peterson through the Reionization epoch
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Undergrad Move the Earth Away from the Sun
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Undergrad Redshift of Star Light: Proportionality to Distance & Other Theories
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Undergrad What is the Drift Rate of Jupiter's Great Red Spot?
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High School What is the correct way to calculate the speed of the Great Red Spot on Jupiter?
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Undergrad Correlation between a Star's Luminosity and Distance?
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High School Picture of the Day: Gas Swirling Around a Black Hole
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Undergrad How to differentiate Doppler shift from star emission
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Graduate Coriolis Drift of Discrete Objects
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High School Formation of Supermassive Black Holes
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Graduate Calculation of the "lightness number" for solar sails
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High School Why the multiverse makes no sense to me
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High School New Plume on Mars - ESA Image Revealed
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High School Rough probability that aliens would visit the Earth?
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High School Calculating solar irradiance at each planet?
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