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 Mass Luminosity relation doesn't hold true when applied to actual data
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Graduate Super novae mechanics - how does it work?
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Graduate Where is the edge of the universe
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High School Why does everything in the Universe form a ball or Sphere?
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Graduate Intergalactic message exercises (for LightCone tutorial)
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Graduate Does Dark Energy break the Conservation of Energy?
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High School What is the shape of a Black Hole?
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Graduate What happens to EM waves outside the universe?
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Graduate Does Distant Starlight Become Coherent Upon Reaching Earth?
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Graduate Is There a Universal Redshift Formula for Arbitrary Spacetime Metrics?
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Graduate Can a Message Travel Faster Than Light to Reach a Distant Galaxy?
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Graduate Fine-tuned Universe; let's find out
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Graduate Switch to scale factor time (universe its own clock)
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Graduate Exotic atoms hold clues to unsolved physics puzzle at the dawn of the
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Graduate Current State of the Big Freeze end of the Universe Theory.
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Graduate Calculation of Universal Constants for Life-Sustaining Universe
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Undergrad What is the shape of the known universe?
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Graduate The most simple explanation for origination of spiral galaxies?
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Graduate Can Technology Allow Us to Travel Back in Time and Create Ourselves?
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Graduate Which: scale or years? as parameter of change
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Undergrad Calculate LST: Uncover the Mystery of 100.46
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Undergrad Example to make clear the difference between specific intensity and fl
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Graduate Critical Density and the expanding universe
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Undergrad The Ecliptic and the Galactic Planes
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Graduate Black hole evaporation, where does it all go?
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Graduate What are N-Body Simulations and how do they relate to matter and dark matter?
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Graduate Imaginary Time: Parallel Universes & Mass?
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Graduate Is the speed of light constant in a vacuum?
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Graduate Was the flow of time slower in the early universe?
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Undergrad Redshifts & Hubble: How Do We Know Galaxies are Moving?
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Graduate James Bond and the true value of the cosmological curvature constant
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Graduate To stir the pot Post inflationary period
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Graduate Universe Shape: Flat or Hyperbolic? Cosmologists Weigh In
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Undergrad Is Dark Energy Truly Real? What Do Scientists Know and Who Rejects It?
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Graduate Dark Matter Evidence: Non-Baryonic Cosmology
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Graduate What's the role of stellar interference in redshifts?
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Graduate Can Black Holes Consume Light Without Increasing in Mass?
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Graduate How to derive dark energy density from Jorrie's Hubble radius limit
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Undergrad Why Consider Dark Matter Over New Space for Universe Expansion?
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Graduate Could Dark Energy Originate from Gravity Waves?
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Graduate How to measure the location of Gamma ray burst ?
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Graduate Lightcone 1.0 tabular cosmology calculator
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Graduate Flat universe and big bang theory
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Undergrad Does gravity affect time on different celestial objects
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Graduate Gravitational potential and the past
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Graduate Cosmo calculators with tabular output
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High School Saturn hurricane spotted by Cassini
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Graduate Gods Lego, what are the chances?
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Graduate Seeking clarification on singularity at genesis
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Graduate Cosmological constant and vacuum energy
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Graduate Print a history of the universe you'd like to share
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Graduate Can a Black Hole's High Entropy State Coexist with Supercondensed Matter?
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Graduate Is there a reason to believe in a limited variety of dark matter?
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Graduate Does angular diameter distance vary with composition of the Universe?
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Graduate White Hole in Universe: Is the Center Expanding?
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High School Uncovering the Mystery: Comparing the Russian Meteor to the Tunguska Event
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Graduate Can the fabric of space ripple like a gentle wave in the ocean?
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High School Universe Expansion: Understanding the Concept
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Undergrad Can Radiation from Black Holes Travel Faster than Light?
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Undergrad Gravitational Lensing vs Gravitational Microlensing
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Undergrad Does Dark Matter Really Exist and What Evidence Supports Its Composition?
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Graduate Linear vs non linear matter power spectrum
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High School Expanding Universe: What Does it Mean?
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High School Where is the universe expanding?
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Graduate Is Loop Quantum Multiverse a Viable Theory?
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Stargazing Using the Celestron C90 telescope
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Undergrad Distance modulus and redshift Ia supernovae Catalog
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Graduate Solar and geomagnetic field interaction with or without solar wind
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Undergrad If the universe is infinite, then the big bang theory can't be correct
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Graduate How Do We Calculate the Age and Distance of Light in the Universe?
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Graduate Can Choices Create Parallel Universes in an Infinite Cosmos?
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High School Time taken for earth to orbit the sun?
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High School Jeans Mass Formula - Find Solution Now!
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Graduate LambdaCDM inflation model dependancies
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Graduate Question regarding maximum accretion of black holes
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Undergrad Question Regarding the Orbit of Comets
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Graduate Inflationary paradigm in trouble after Planck2013 ? I doubt it, but
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Undergrad Did the Chelyabinsk meteor really explode ?
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Graduate Do Schwarzschild Black Holes exist?
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Graduate Jeans instabiity & gravitational collapse
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Graduate What Determines the Precise Chronology of the Universe?
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Graduate Cosmological redshift interpretation
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Graduate Why are scientists puzzled at the time of the universe that we are in?
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High School Moon's Orbit: The Science Behind Its Path
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Undergrad Can this planet have an ocean of water?
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Undergrad Quasar is a huge source of energy
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Graduate What do positrons have to do with dark matter?
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NASA SDO: 3 Years of Solar Images
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Graduate Specific question about infinite size and age of the universe
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Graduate How can two Black holes fusion and consist a supermassive Black Hole
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Graduate Could absolute motion exist in higher dimensions, if they exist?
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Graduate Speed of light in a dark matter medium
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Graduate Can We Make Contact with an Anti-Matter Black Hole?
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High School Why is it called the 'Universe?'
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Graduate Will charged black holes evaporate?
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Undergrad Hubble Constant am I gettting this right?
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High School Why do black holes have such strong gravitational pull?
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Graduate Orbital period of a star in the Milky Way?
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Graduate Why Don't Observations Support the Big Bang's Optical Predictions?
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Stargazing Pictures from the Hubble Space Telescope
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