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 Iapetus equatorial ridge fell from the skies
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High School Doubt in a scene from the movie Gravity
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Undergrad Is circumnavigation possible on Phobos or Deimos?
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Undergrad The Sun's Next Phase: Can We Avoid Extinction?
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Undergrad Why terrestrial planets in inner solar system & gas giants in outer?
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Graduate Found: The First Double Star That BRIGHTENS During Eclipse
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Undergrad Why is angular momentum not conserved in 2 similar mass planet system?
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Undergrad How accurate is our image (depiction) of the Milky Way?
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Graduate Understanding the Luminosity of Radiative Stars
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Stargazing How big would a neutrino telescope have to be?
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Blood moon Total Eclipse tonight
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Graduate Big Rip Cosmology and Many-Worlds Quantum Mechanics
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Undergrad Why did Earth lose its first atmosphere but keep its second?
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High School How did Copernicus get the idea of the heliocentric model?
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Graduate Is the universe a causal system?
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Graduate What would happen if the moon's orbital radius were increased?
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I captured a celestial event, could someone explain what it is?
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Graduate Why Are Saturn's Rings and Planetary Orbits Aligned Despite Cosmic Disturbances?
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High School Although the wrong theories contributed to scientific evolution
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High School Gravitational Constant: Earth vs Other Planets
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Undergrad How do they calculate how fast celestial objects are moving?
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High School Why is the universe considered as cold?
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High School Which Telescope Offers the Best Value for Under $150?
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Undergrad Unusual light rising from Martian surface
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Graduate Why do stars show absorption lines?
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Undergrad Gravitational Redshift and Hubble.
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Undergrad Is the Mass-Luminosity Relationship for Main-Sequence Stars Linear?
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Graduate Black Hole Formation and Iron Distribution
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Graduate What sets the fusion rate in a main-sequence star?
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Undergrad The Sun's End: Predicting the Inevitable
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Graduate How many particles could be crammed into the universe?
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Graduate Quantum perspectives in basic astrophysics?
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Graduate Orbit change due to hypothetical mass change
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Graduate Are Modifications Needed for Escape Velocity in Elliptical Orbits?
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Undergrad Smallest Body Possible to Have Rings
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Graduate Near black hole event horizon time dilation?
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Undergrad Where Do Stars Form: Cool Nebulas or Hot Nebulas?
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Graduate How does a solar flare cause a magnetic crochet?
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High School Can Sun's Gravity Alter Earth's Landscape Over Billions of Years?
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Undergrad Were we really created from supernovas?
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Undergrad The weak force, first step of nuclear fusion in the Sun
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Graduate Superkick: Galaxy mergers can eject the central supermasive black hole
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Which software is used for creating simulated cosmic systems?
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High School Why Do Only Gas Giants Have Rings?
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Undergrad Normal Force in Space: Ball on Table in Spacship
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Graduate Is Pluto a Collisional Family? Examining its Unique Orbit and Recent Moons
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Exciting Future Space Missions: JWST and New Horizons on the Horizon!
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Undergrad Discovery of Asteroid With 2 Rings - Centaur Chariklo
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Undergrad Astronomy Day is coming at my university; any suggestions for demos?
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Is anyone familiar with The Open Astronomy Journal?
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Graduate Can top rungs replace bottom ones in cosmic distance ladder?
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Undergrad The elliptical orbits and inverse-square law forces.
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Graduate Is there a density point which reduces anything to a black hole?
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High School Can atoms move from place to place without passing the space
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Stargazing ALMA vs James Webb: Which telescope will reveal more about the universe?
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High School How much of the night sky one could see from various locations
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Undergrad Apologizing for Grammar: Time, Speed & Space
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Graduate The Fastest-Approaching Object in the Universe
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Undergrad What substance could potentially flow and pool on the surface of Venus?
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High School How long would it take for an asteroid to travel to our sun-system ?
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Undergrad How likely is it that Europa has life under its icy surface
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Graduate B-mode plots, spherical harmonics?, fundamental modes?
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Undergrad Nearest Stars to Earth: Red Dwarfs Dominant
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Graduate Remove Pupil Ghost using IRAF rmpupil
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Graduate Falling matter of supernova does work heating the core?
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Graduate About a spacecraft trip to the asteroids
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Undergrad Are Black Holes Necessary for the Universe to Function?
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Pluto Regains Its Title as Largest Object in the Edgeworth-Kuiper Belt
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High School Understanding the universe in real time
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Undergrad The magnitude of Earth from Moon
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Graduate Why is a non-rotating object moving in a circle impossible?
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Graduate Hawking radiation and information
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Graduate Can a thimbleful of neutron star material cause damage to Earth?
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Undergrad Moon Dust & Cosmic Radiation: Risks of Bringing it to Earth's Surface
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Graduate Primordial black holes ruled out as dark matter candidate
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Graduate How does the expansion of space affect the direction of time?
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Graduate Where does Space time come from?
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Graduate Planes of Rotation in Solar System & Beyond
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Graduate How long does it take for 3 planets to align themselves at an angle
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Undergrad Bizarre vertical light phenomena help
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Stargazing City viewing with dobsonian telescope?
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Graduate Do black holes violate conservation laws?
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High School Why is Alcor not considered part of Ursa Major?
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Undergrad Orb.mec: Is the inclination of an ecliptic-perpendicular orbit 113,4º?
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Graduate Solving 'Too Big to Fail' Problem: 7 keV Sterile Neutrino Dark Matter Models
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Graduate Evidence of an asteroid encountering a pulsar
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Graduate The Planet That Should Not Exist
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Graduate Fluctuations of the CMB, symmetry between the hot and cold?
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Undergrad Please explain XX μm-selected galaxies
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Undergrad Size of university and Dark Matter
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Graduate At what distance would binary planets not be tidally locked?
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Graduate Rate of planets flowing into stars: Discussion
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Undergrad Understanding Planetary Spheres: The Role of Gravitational Compression
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Graduate Confused - nucleosynthesis of carbon
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Undergrad Do Jupiter Trojans Ever Collide with Other Objects in Their Orbit?
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Graduate About radioactive emission by Jupiter
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Graduate How Do We Know the Universe's Expansion Is Accelerating?
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High School Explanation of Equatorial Coordinate System?
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Graduate Magnetic sail using radioactive decay
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Undergrad How Can Kepler's Third Law Be Applied to Multi-Object Systems in Visual Python?
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