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 Einstein-Rosen Bridge: Black & White Hole?
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High School What color is the sky from space for an astronaut?
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Graduate Understanding Virialized Dark Matter Halos in Galaxy Formation
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Graduate Does this neutron star have an accretion disk?
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Graduate Clarification about Earth's Precession
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Graduate Wormhole Metric: Solving Difficult Differential Equations
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Graduate What was the role of Hawking Radiation in the early universe?
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Graduate Is Dark Energy Really Necessary for Explaining Cosmic Expansion?
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Insights Knut Lundmark and the Prehistory of Dark Matter - Comments
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Graduate Can I Build My Own Deep Space Antenna Network for Receiving Planetary Probes?
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Graduate LaGrangian Points, L1,L2, L3 and L4
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Undergrad Range of Earth's year within habitable zone?
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Insights LightCone7Combo Tutorial Part II - Charts - Comments
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Graduate Brown dwarfs and close binary systems
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Graduate Expanding space or contracting matter?
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Undergrad How often do satellites pass the moon?
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Graduate How does the event horizon of a black hole form during the collapse of a star?
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Graduate How Does Turbulence Restore the Poloidal Magnetic Field in Solar Reversals?
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Undergrad Center of Mass of separating Orbiting Mass
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Graduate Is the Sun Positively Charged?
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Undergrad How to calculate light intensity?
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Undergrad Another newbie question: paradox: size vs. age
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High School Orbits in Universe: Milky Way, Sun, Moon & More
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Undergrad How does the expansion of the universe work?
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Graduate Gaussian vs. non-Gaussian fluctuations
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Graduate CMBR, Dark Matter: Unraveling What it Means
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Graduate What are Black Hole Singularities: Physical or Mathematical?
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Graduate Oribit integrator for a logarithmic potential
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High School Can You Help Discover New Planets with Kepler Data on Planet Hunters?
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Graduate Comments - Inflationary Misconceptions and the Basics of Cosmological Horizons
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Graduate Are black holes more redshifted than the CMB?
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Undergrad Could 0.9c neutron star jets originate from the core?
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High School "Gravitational Compression in Neutron Stars"
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Graduate Is space an entity, a relationship or a concetual framework?
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High School What Is the Evidence for Dark Matter and Dark Energy?
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Graduate Does the event horizon change as large objects approach it?
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Graduate Does this dynamic model complement the Balloon Analogy?
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High School How Do Orbits Work?
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High School Zig Zag Star Movement in Singapore 2011
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Graduate What constitutes negative and positive energy
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Undergrad Aerostat on Venus vs Surface Colony on Mars
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Graduate Stellar-mass black hole formation sequence
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Graduate X-ray bursts might not happen for larger neutron stars?
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Graduate Astronomical source extraction in non uniform background
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Undergrad Question Concerning the Rate of Expansion
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Undergrad Has Gravitational radiation been found
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Graduate How massive of an object would be be required....
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Graduate A possible super-Earth or Brown Dwarf in our Solar System
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Graduate Could Planet 9 have caused the gap between the heliopause and the Oort cloud?
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Undergrad Space Travel Physics: Realistic 2D Simulation
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Graduate The probable trajectory of the ninth planet in night sky?
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Undergrad Travelling at the speed of light
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Graduate Dark Energy in Relation to Spacetime
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Graduate Did Black Holes appear in the first billion years?
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Graduate Space-Time Distortion and Warp-Drive
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Graduate How Does Normalization in LightCone7zeit Enhance Cosmological Graph Comparisons?
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Insights LightCone7Combo Tutorial Part I - Comments
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Graduate Supermassive black hole evolution
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Undergrad Calculating Relative Brightness of Type Ia Supernovae
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Graduate What is the cause of variations in lunar eccentricity?
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Graduate Time evolution of density profile
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Undergrad Two stars with the same mass equals the same luminosity?
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Graduate Has information been lost to a black hole?
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Graduate Speed of light from BB to present day
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Graduate Loss of stellar information in a black hole
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Graduate Speed of light/electromagnetic waves is constant?
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Graduate Naive Question about Dark Matter
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Graduate Possible Intermediate-Mass Black Hole in Milky Way Galaxy
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Graduate Sigma_8 and n_s Cosmological Parameters
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Graduate Understanding the phase-space representation of Ensembles
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Undergrad What Are the Unique Properties of a Black Dwarf?
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Insights Can We Tell Whether the Universe Is Rotating? - Comments
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High School Can you tell the Physical Properties of a Messier Object?
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Graduate Question regarding Friedmann equation
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Graduate The Simpson-Hawking Donut Universe
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High School Can a Black hole also be a wormhole?
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High School Can Cosmology Be Experimentally Verified?
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Graduate Black hole singularty definable In 3D space?
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Undergrad Venus' Synodic Year: Why Does It Take Longer Than Earth's?
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Graduate Is There Evidence for Redshift Drift in High-z Galaxies?
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Undergrad Expanding Universe: Big Bang & Beyond
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Undergrad How fast was the expansion during the big bang?
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Stargazing How to calculate the amount of light a telescope collects?
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Graduate Best Place to View Stars: North Pole
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Graduate Loop quantum cosmology vs string cosmology
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Graduate Questions about the topology of the universe
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Graduate How long would it take two planets to collide?
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Graduate Could the Universe's Expansion Form a 'Clock' in a Hot Big Bang Scenario?
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Graduate How exactly is information for CO transitions found?
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Undergrad Expanding universe and age of light
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Undergrad Calculating Galaxy Distance for Light Speed using Hubble's Law
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Graduate Can the Universe Transition from Finite to Infinite?
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Graduate Questions about the balloon analogy
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Stargazing Astrophotography -- Best Telescopes?
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Undergrad How fast to shoot a bullet for it to hit the moon?
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High School Rapid Formation of the Moon: Insights from Theia Impact
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Graduate Does mass slow the expansion of space?
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Graduate How to stop a black hole forming?
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Graduate Can Higgs be the inflaton - can LHC produce an inflaton 750
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Graduate Is There Direct Evidence of Cosmic Re-acceleration?
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