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 Highest expansion rate during inflation.
  • MTd2
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Undergrad Can Stars Become Black Holes Without Going Supernova?
  • Routaran
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Graduate Particle creation in an accelerating Universe?
  • johne1618
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Graduate Can Non-Conservation of Momentum Be Explained by an Asymmetry of Space?
  • azabak
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Graduate What is the physical significance of the WMAP power spectrum?
  • ditzycloud
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Graduate Newtonian cosmology vs relativistic cosmology
  • houhou.trad
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Undergrad Energy of photons and the red shift
  • davidmroper
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Graduate I have some somewhat detailed questions about inflation, curvature, and entropy
  • ocsis2
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High School Can you see stars from the surface of a ringed planet?
  • TkyToaster
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High School Tilt of the earth's axis. Why does it change?
  • McLaren Rulez
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Graduate What Lies Beyond the Expanding Universe?
  • beatlemaniacj
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Graduate Help with calculating an impact on the moon
  • John Clayborn
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Graduate Spectral Energy Distribution of T Tauri stars
  • Jamipat
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High School Any idea on how to identify a celestial event?
  • murdochandi
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High School Question About the Wow Signal from 1977
  • AlexSETI
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Graduate How Do We Distinguish Red Shift Changes Over Time in Distant Objects?
  • kinman
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Graduate Does the Universe have a Boundary ?
  • Aquafire
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Undergrad Convective motion and Stellar jitter
  • Jamipat
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Graduate What about gravity's relativity?
  • C. Bernard
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Graduate Where is the center of the universe?
  • thetexan
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Graduate Is the total energy of each particle constant in an expanding universe?
  • johne1618
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High School Why Can't I See the Milky Way in the City?
  • joeyjo100
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Undergrad Fund ESA's Billion-Plus Euro Project for 2020s Launch
  • Ryan_m_b
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Graduate What Caused the Flaw in the Singularity that Triggered the Big Bang?
  • curiouschris
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Graduate Dark Energy Changing Into Dark Matter.
  • hankaaron
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Graduate Could Neutrinos Be the Key to Understanding Dark Matter?
  • WhiteKnights
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Graduate The Cyclic Model: Multidimenstional Membranes? Where do these come from?
  • Physgeek123
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Graduate Antineutrinos? Is this a plausible theory?
  • Physgeek123
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Undergrad Plank curves and emission/absorbtion spectra
  • goldsax
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Undergrad Eccentricity of orbits and gravitational energy
  • sk9
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Graduate Mechanism for matter creation in an expanding Universe?
  • johne1618
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Graduate Question on how stars are located
  • jackcr
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Undergrad Biggest Physics Discoveries 1980-2012
  • Opus_723
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Graduate Can Simple Mass Accretion Turn a Neutron Star Into a Black Hole?
  • tvscientist
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High School What is Gravity? How Does it Work & What Are Effects?
  • Nash Su
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Graduate What happens when a neutron star collapses into a black hole?
  • edearl
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High School Going to Mars as a private company - How hard would it be?
  • Lightingbird
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Undergrad What would happen if the sun was hit by a gamma ray burst?
  • Nash Su
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Graduate Cosmologists: why the acceptance of any weird theory but god?
  • Homesick345
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Graduate Looking for an introduction to eternal inflation
  • IRobot
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Graduate Spaghettification electromagnetism
  • VeronicaS
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Undergrad Why Does Pi Appear in So Many Scientific Equations?
  • goldsax
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Graduate The Sun and Hydrogen into Helium Fussion?
  • parallaxoz
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Graduate Can light be affected by other masses in deep space?
  • dan4blues
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Graduate How to Calculate Intensity in Airy Disk from a Point Source?
  • Drakkith
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Graduate How to accrete neutral gas after the reionization of the universe?
  • philherna
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Undergrad Do objects really take up space?
  • taurusaud
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Graduate The Impact of Multiple Universes on Big Bangs
  • space_buster
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Stargazing How many percent does the kepler telescope investigate of the sky?
  • Gliese123
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Undergrad What is our perpective, where did it start, and why can we see it?
  • Dokshifty
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Undergrad Is the Universe Finite or Infinite in Space?
  • goodoldrebel
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Graduate Half Closed Universe: Is It Finite?
  • sea100
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Graduate How do we account for all the elements in the Universe?
  • CramerTV
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Graduate How Do We Know Gas Contributes to Galactic Gravity?
  • adamq1
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Graduate How to calculate perihelion precession
  • Bjarne
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High School Can Earth sustain much bigger object with an infinite weight?
  • Munyit
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Undergrad Unraveling the Mystery of ISM Dust: Origins & Categories
  • skydivephil
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Graduate Angular Resolution: Best Possible Observing Distance for Stars
  • intervoxel
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Graduate Do Gravitational Waves Scatter and Increase Entropy?
  • pawprint
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Graduate Rate of universe expansion question
  • AdamLin
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Graduate If Betelgeuse Went Supernova Soon
  • Drakkith
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Undergrad Where do the heavier elements come from, such as those found in planets?
  • Kaldanis
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Graduate Could dark matter have gamma-ray absorption lines?
  • johne1618
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High School How quickly does a star's supernova become apparent to the naked eye?
  • Ender55
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Graduate Small scale effects of expansion, and 'bound' objects
  • zhermes
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Graduate Short GRB's: Neutron Star Merger Evidence?
  • skydivephil
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Graduate How do we define 'Earth like planet'
  • YummyFur
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High School Witnessing a Sideways Half Moon: Michigan, USA
  • Tomato
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Graduate What might happen if an object struck and replaced Luna
  • highjustice
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Graduate Dark Energy, Dark Matter, and Empty Space
  • soyounoat
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Graduate Need help learning about Dark Matter
  • Bhumble
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Graduate Does Space Expand? What Do You Think?
  • Wallace
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Undergrad Is the Universe’s Accelerating Expansion Theoretical or Observable?
  • gttjohn
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Graduate Great Analogy of Holding a Rope Above a BH?
  • Drakkith
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Graduate The meaning of the curvature term
  • Loro
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Graduate Is the mass of a black hole diminishing for a free falling observer ?
  • dreynaud
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Graduate Cosmo calculator-recession speed tutorial
  • marcus
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Undergrad A few qustions about Dark Matter from a beginner.
  • 721
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Graduate What is Magnetic Buoyancy and How Does it Affect Neutron Stars?
  • ImaLooser
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Graduate Cantor, infinity and cosmology
  • dkotschessaa
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Graduate Neutron star temperature and cooling
  • tom.stoer
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Graduate What is the significance of JD and how is it calculated?
  • JeffOCA
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Undergrad When astronomers speculate the distance of galaxies are they talking about its
  • =entropy
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Graduate Hubble's law and cosmological density
  • Naty1
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Graduate Does Creation of Energy in Universe Violate Conservation of Energy?
  • Pandasaur1702
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Graduate Best Computer Language for Employment
  • Andy Morris
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High School What is the minimum angular distance from the Sun for Venus to be visible?
  • kaleidoscope
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Undergrad Dark Energy: Does It Affect All Space?
  • binbots
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What Should I Include in a 15-Minute Astronomy Presentation for Special Kids?
  • loocary
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High School I understanding the edge of the universe
  • sambarbarian
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Did We Just Witness a Supernova in M95?
  • Drakkith
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Undergrad Why Does the Analemma Show an Ellipse for Solstices?
  • JeffOCA
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Graduate Is order a natural occurrence or a result of chaos?
  • Primus2x
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High School Human Eyes See Cosmic Bubbles that Algorithms Miss
  • Dotini
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Graduate What Are the Major Conflicts with Standard Cosmology Models?
  • bill alsept
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Graduate How Can an Infinite Universe Have Finite Energy?
  • JamesOrland
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Graduate Astronomical cupolas & thermal equilibrium
  • JeffOCA
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Graduate How Can You Determine the Right Ascension of a Star with a Meridian Circle?
  • JeffOCA
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Graduate Determining Mass Ratio of Double Star Systems with Spectroscopy
  • JeffOCA
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Graduate How Can the Big Bang Be Visible Everywhere in the Universe?
  • SREW
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