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.
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 Mass of Universe: Planck Time, Planck Mass & 65 kg
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Graduate Why not a flat but finite spatial universe?
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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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Graduate Behind the improbability of our universe
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Graduate When was (or will be) inflation confirmed?
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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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Graduate What if the Gravitational Constant were larger?
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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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Graduate If G is constant, why didn't the early universe collapse?
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Graduate Time, energy, information constants
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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 Does Measurement Affect Reality? Examining the Concept in Physics
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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 Regaining Causal Contact by passing Event Horizons
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Graduate Clarification on dark energy please
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Graduate Is there a density point which reduces anything to a black hole?
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Graduate What is the relationship between space and time?
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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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Graduate Understanding Superhorizon Dynamics in Cosmology: A Mathematical Perspective
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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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Graduate Metal packing structure and curved space
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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 Cosmology vs. Physical Cosmology
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Undergrad How likely is it that Europa has life under its icy surface
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High School How do we know how old the universe is?
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Graduate The Measure Problem and the Youngness Paradox
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Graduate A thermal expansion coefficient of spacetime?
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Graduate B-mode plots, spherical harmonics?, fundamental modes?
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Graduate FAQ-Is universe black hole: clarification request
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Undergrad Nearest Stars to Earth: Red Dwarfs Dominant
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Graduate How Does the BICEP Measurement Indicate Inflation Near the GUT Scale?
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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 The Horizon Problem: Explaining Universe Isotropy
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Graduate Space/time curvature of the young universe?
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Graduate Understanding Primordial B-modes and Cosmic Inflation
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Graduate About a spacecraft trip to the asteroids
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Graduate Last scatter by e-, light looks hotter, cooler, time, wavelength.
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Graduate How could inflation interact with recombination radiation?
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Graduate CMB polarization data plots, almost a vector field, then what?
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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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Graduate Closed, collapsing universe+only photons at first -> matter when hot?
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Undergrad The magnitude of Earth from Moon
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High School Indulge a poet a few questions about Big Bang?
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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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Undergrad Antimatter recreating the big bang
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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 Fast/slow Alfven waves in High/Low Beta Plasma?
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Undergrad Can a hypernova explosion last for years?
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Graduate How long does it take for 3 planets to align themselves at an angle
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Graduate FLRW Metric and Explaining the Role of Gravity in the Big Bang Theory
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Graduate Spin of Black Hole Directly Measured?
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Graduate What is the structure of a black hole's singularity?
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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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Graduate Is There a Mechanism for Creating Matter from Nothing?
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Graduate What is the grid of the universe and how does it explain the bending of space?
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Graduate Why is the scientific community divided on the existence of dark matter?
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High School Why is Alcor not considered part of Ursa Major?
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Graduate What is the Rationale Behind Eternal Inflation?
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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 Could universe be a blackhole inside a white hole?
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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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Graduate Good books on superclusters and voids?
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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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Graduate Thermo/hydro visualization of the Cosmos
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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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