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 Gerald Shroeder and the age of the universe
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Graduate Could Black Holes Expand in Negative Dimensions and Create a Negative Universe?
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Did Anyone See Asteroid "Beast" Fly By Earth?
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Graduate Matter vs Anti-Matter: What Survived the Big Bang?
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What Are Some Recommended Astronomy Books for Laypersons?
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Graduate The black Hole Wars - Losing Information in the Hawking Radiation
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Graduate Simple explanation of the lunar highlands problem
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Graduate 2-point correlation functions for curvature perturbations
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High School Give Me Some Perspective: Size of Universe?
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Graduate Space-Time & Matter: Explaining the Difference
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Graduate Mass required for a closed universe.
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Undergrad Astronomers Measure Hubble's Constant at 68 km/s/Mpc | Space.com Study
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High School Unidentified Constellation: Deciphering Star Patterns and Their Meanings
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Undergrad Can Black Holes Increase in Mass?
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Graduate Must (Ve) expansion of the universe be C?
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Graduate Implications of the divisibility of time for the study of the big bang
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Graduate Final State of the universe 10^ googal plex^ googal?
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Simulated Universe: Who or What is the Creator?
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Graduate Closed Universe? Local H0 Measurements & Relativistic Corrections
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Undergrad DECIGO: Launch Date & Funding Status
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Graduate Numerical Facts about the Milky way's halo
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Graduate Inclination of Equatorial North Pole relative to Galactic Equator
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Graduate Gravitational attraction on the cosmic scale?
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Graduate Why does a singularity have to exist?
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Graduate Why Are Statistical Significance Maps Used in Cosmic Ray Anisotropy Studies?
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Graduate Is the Universe's Shape Spherical or Hyperbolic?
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Undergrad Is the CMB a Distorted Image of the Early Universe?
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Graduate If every event is governed by one or more laws
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High School 40,000 years taken for light to reach here?
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Graduate If black holes don't exist then neither does the cosmic horizon?
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Graduate BICEP2 & Penrose: Inflation's Impact on Proving Initial Conditions
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Undergrad What do we exactly mean by space is expanding?
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Graduate Calculating Redshift for Objects in the Universe
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Martians observe Mercury solar transit
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Undergrad Is Space Within Atoms Also Stretched by the Big Bang?
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Stargazing Whats an innovative idea for a nuclear telescope?
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How to identify that light in the sky
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Graduate Can someone explain why we need inflation?
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Graduate What if there is no Dark Matter?
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High School Focal length short and long. Which to choose?
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Graduate Dark matter distribution around black holes.
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Stargazing Celestron Powerseeker 60AZ Telescope
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Tracking the International Space Station
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Graduate Is Saturn's 63rd Moon Being Born?
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Graduate Possible research topics for high redshift galaxies and AGN
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Undergrad Stars Creating Elements Heavier than Iron
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High School Can a body in space form a sphere?
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Graduate A layman with an idea, foolish perhaps
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Undergrad Voids inside atoms and voids in space?
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Undergrad How can Google Sketchup simulate Sun and Earth movement for seasonal changes?
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Graduate Speed of Light Affecting Objects' Appearances?
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High School Sun & Moon Coincidence: A Remarkable Fact
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Graduate Rate of expansion of the universe
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Graduate Is the expansion accelerating or decelerating?
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Graduate How Did Scientists Miscalculate the Distance of UDFj-39546284?
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Undergrad Conics and Beyond: Understanding Trajectories in Multiple Gravitational Fields
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Graduate Traces of Theia Found on The Moon
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What is your favourite episode of Cosmos: A Space-time Odyssey?
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High School Discover Mega-Earth: Kepler-10c 17x Heavier Than Earth
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Undergrad Red Shift & Blue Shift: Explained
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Graduate Concordance value of Hubble growth rate (2014)
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Graduate Questions on Hubble's law and Friedmann equation
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Graduate Tidal Acceleration and planetary rotation
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New Cosmos: A Spacetime Odyssey 2014 TV Series
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Graduate Gamma Ray Burst datasets that consist of distance modulus & redshift
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Graduate What is the connection between Kolmogorov complexity and randomness?
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Undergrad Understanding the Expanding Universe and Its Impact on Earth's Distant Future
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Undergrad If the universe is expanding, how can 2 galaxies collide?
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Graduate Can Space Curve Without Mass or Energy?
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Graduate Information conservation and Big Bang
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Graduate Question concerning density of dark energy
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High School Is the fabric of space displaced by a mass object in it?
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Graduate How Does the Velocity of Distant Stars Relate to the Mass of the Universe?
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Graduate Non-anthropic String Theory Landscape and Finite Universes
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Graduate Five Cepheids Detected on the Other Side of the Galaxy
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Graduate Is the concept of finite mass-energy in the universe outdated?
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Graduate Need rebutal for plasma EU theory
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Graduate Friedmann's Acceleration Equation
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Graduate Could Supermassive Black Holes At The Center Of Galaxies Be Wormholes?
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Graduate How does a nebula form from a neutron star
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Graduate Is Inflation Eternal Into the Past?
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Graduate DeSitter and AntiDeSitter Universe
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Graduate Conservation of Energy in the Universe at Large
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Graduate Big Rip Compatible with Flat Universe?
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High School Is Saturn the Night Object in Photos?
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Graduate Did Electrons Form Before Quarks? Chronology of Universe's Reheating Phase
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Undergrad Can dark energy be a different dark matter?
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Graduate Cosmology for Enthusiasts: Understanding Bicep2 Data
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Undergrad Detect planets in solar systems like ours
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High School What causes a supernova to occur?
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Graduate A few questions about size and shape
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Graduate Solar Wind Modulates Lightning - Mechanism Unknown
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Graduate Baryonic acoustic oscillations and density perturbations
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Undergrad Inverse square law explains Olbers' paradox?
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Graduate Must the curvature of space be constant?
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Graduate Superconductors and Space: Can Electricity Bend Reality?
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High School How does Andromeda look from just a set of 10x50 binoculars.
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Camelopardalis meteor shower (storm?) May 23/24
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Stargazing Telescope to see up close to nebulas and galaxies
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Nice general collection of high resolution astro images.
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