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.
Graduate Photon's History: Quantum Expression for Energy Loss with Scale Factor Increase
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High School Trying to understand the universe .possible at 13 years old?
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Graduate White dwarf mass-radius relationship
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High School Boundaries between the Constellations
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Graduate Can black holes hold the key to the origin of our universe?
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Graduate Origin of our universe 4D black hole
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Undergrad Were all galaxies quasars when they were young?
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Graduate Dark matter possibly explained by axions?
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High School Moon Phases: Rise & Set Timings & Direction Explained
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Undergrad I require help with understanding beginner astronomy questions.
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Graduate How is the Rotational Velocity of Galaxies Measured?
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Graduate Why do large elliptical galaxies not collapse due to their gravity?
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Undergrad Is Infinite Space the Key to Understanding the Big Bang?
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Graduate Does cosmic time (or comoving clock) run at the same pace at all times?
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Undergrad How Stars Ignite - The Fusion Reaction
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Graduate Are High Z SNe Brighter than LCMD Predicts?
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Graduate Current Research on Communication Between Universes?
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Undergrad Determine the least value of declination of stars so that stars can be seen?
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Graduate Can a Balloon Float Inside a Hollow, Air-Filled Space Elevator?
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Graduate Why do black holes vanish over time?
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Undergrad What's the scale on Mars rover "Microscopic Imager" images ?
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Graduate Measuring Cosmic Rays: There's an App for that
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High School Uranus' closest approach to earth and its interval
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Graduate What exactly is the Hubble parameter?
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Undergrad Kepler's 3rd Law: Solving Questions & Math
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Graduate Dark Matter does not exist, what do you think?
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Graduate Lagrange Point and orbital velocity
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What would you do if you were in space
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Undergrad What Are the Mysteries of the Universe We Still Need to Understand?
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Unraveling the Expansion of Our Universe: Seeking Answers | Nautical Thoughts
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Graduate Is the universe NOT accelerating ?
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Graduate Proof that black holes do not destroy information
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High School Solar Cycle: Current State & Update
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Undergrad How can I determine right ascension and declination of a star in the sky?
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Total Lunar Eclipse 8th Oct 2014
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Graduate What is the true purpose of inflation in the early universe?
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Stargazing Is a Geo Stationary Satellite the Key to Building the World's Biggest Telescope?
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Graduate What is the Visible Mass of the Milky Way?
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Graduate Galaxy Formation: Searching for Primordial Origins
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Graduate Inertia in Space: Opening a Hatch
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Graduate ULXs & Black Holes: Unveiling Secrets of Escape Velocity
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Graduate Is Dark Matter Only Interacting Through Gravity or Are There Other Theories?
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Graduate Can There Be Time Without Space? A Question for Discussion
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Graduate Calculating Exoplanet Habitability using Stefan-Boltzmann Law | Habitable Zones
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Graduate Why does light travel radially in the FRW universe?
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Graduate Is there an unseen part of the universe older than the known universe?
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Graduate Big Bang, big rip, lQc, has anyone ever run a computer simulation?
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Undergrad Introdutions to mathematical astronomy?
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Undergrad Reynolds Number and Turbulence in Atmospheric Boundary Layers
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Graduate Could the Big Bang be related to the flow of current in vacuum tubes?
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Graduate Why does inflation generate gravity waves?
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Graduate Was the CMB Radiation Predicted or Post-Dicted by Big Bang Cosmology?
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Undergrad Does the observable universe support the idea of circular math?
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Graduate Is a Connection Between Black Holes and Time Machines Possible?
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Graduate Dark Matter: Why doesnt dark matter coalesce 'into' Ordinary Matter - Repost
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Undergrad Black Holes Colliding: Evidence & Expectations
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Graduate Mass Profile in Elliptical Galaxies
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Graduate Where Is Dark Matter in the Universe?
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Graduate I don't believe in singularities
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Graduate Relationship between Ultracold neutrons and neutron stars
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Graduate A Question Concerning Solar Flares
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Graduate Are neutrons in a neutron star relativistic?
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Graduate Is the Universe Actually Collapsing Instead of Expanding?
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Graduate Making basic astro/cosmo calculations easy with google calculator--examples
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Can Microorganisms Help Us Understand Aging Rates on Other Planets?
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Graduate Can You Orbit the Photon Sphere Without Being Pulled into the Event Horizon?
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Undergrad Is it accurate to say 99% of the universe is pure black with no sound?
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Graduate When Was the Universe's Expansion Rate Zero?
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Graduate Dark Energy an effect of inhomogeneity?
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Graduate Beginning of accelerating expansion
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Graduate Missing low-metalicity Red Dwarves
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Graduate Why is temperature inversely proportional to the horizon's area?
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Graduate How did massive black holes form and grow in the early universe?
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Undergrad Could Super-Bacteria from Space Pose a Threat to Earth?
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Undergrad Gravitational Lens with home scope?
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Graduate Unraveling the Mysteries of Dark Energy and Dark Matter in the Universe
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Graduate Where can I find an updated Milky Way density profile for my simulation?
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Graduate Who should we give credit for considering the possibility of Black Hole?
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Graduate Infinite Regress | Why is everyone telling me I am wrong?
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Graduate How far from Event horizon are you safe?
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Graduate Is hyperbolic space consistent with homogeneity?
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Graduate Why is stellar ash found in the core of a White Dwarf so dense?
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Graduate The fabric of the cosmos - Universe or Multiverse
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Graduate How can black holes coexist with the expanding universe?
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Graduate Gravity and Gas Pressure on an Accelerating Object
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Graduate Can another blackhole pull you out of the event horizon of a blackhole
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Graduate Horizon distance at last scattering surface
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Graduate Spiral Galaxies as Gravity Lense
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Graduate Explore Laniakea: The Supercluster Earth is in
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Undergrad How does solar wind effects Geomagnetic Field?
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Stargazing UY Scuti, the biggest known star, viewed through a telescope
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Undergrad Oldest part of the galaxy that could have held life?
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Graduate Inhabitable planets at doable distances ever or somewhere?
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Graduate Empty Space: Energy, Warping, Bending, & Gravity
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Graduate Carbon based Life vs. Plasma based Life.
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Graduate Rethinking the origins of the universe
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Graduate What happens beyond 13,7 billion light-years?
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Graduate Cross-Referencing MK5(SAO) & BD-HD Numbers with Constellations, NGCs & ICs
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Graduate Dark energy: is it just "lost" light?
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Graduate Where is the future if everywhere is the past?
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