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 What if Neutron Stars Collide: Matter, Mass & Metal
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Graduate Nature and The Universe, How can Nature being conscious, know what it is doing ?
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Graduate Frustrated Over Tonight's Morgan Freeman Show
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Graduate Relativistic Jets from Supermassive Black Holes?
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Undergrad Are Black Holes Really Black and Just Holes?
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Graduate Difference between outbursts and flares in X-ray accreting binaries
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Graduate How do we know there is a timespace fabric?
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Graduate Discovering the Shape of Spacetime from the Big Bang: A Scientific Exploration
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Graduate Object Approaching Black Hole: Time Dilation & Visibility
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Graduate A could be explenation for the universe but probably not.
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Graduate Infinite universe and big bang singularity
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Graduate Gravitational waves and others contradictoriness
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Graduate Is the Milne model compatible with Einstein's field equation?
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Undergrad First post a question about Black Holes and Gravity
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Undergrad Acceleration due to gravity in a galaxy?
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Graduate Just wondering what the latest descriptions of space were.
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Graduate How Fast Do Stars Orbit in Different Galaxies?
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Undergrad Active Volcano in Venus: Unveiling the Mystery
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Why Does My DSI Pro II Show a Black or Grey Screen?
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High School For Just How Long Has the Periodicity of Halley's Comet Been Known?
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Graduate Neutron Star Stability: Does Proton Crust Matter?
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Undergrad With the laws of physics you can get Universes?
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What Is The Sky - Gazing Into Space?
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Graduate How Does Dark Matter Influence Gravity in Galaxies?
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High School Has There Been a Recent Supernova in Andromeda?
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Undergrad Matter, energy, space, time and gravity
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Graduate Could every possible universe exist somewhere ?
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List of Astronomical Associations / Astrologist in USA
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Who Decides Humanity's Space Destinations and Why?
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Graduate Why is the Hubble sphere expanding?
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Undergrad Universe Expansion = Drop in Gravity ?
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High School Comet near the sun whose orbit is?
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Undergrad What Powers a Supernova Explosion?
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High School What happens to an empty can in space?
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Undergrad How big and bright is the Sun seen from 120 AU?
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Graduate Solar sailing Mercury into Venus
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Graduate Black Hole - Dark Energy and Matter Question
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Graduate How much hydrogen has been consumed?
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Graduate Traveling to Alfa Centauri at 1/2 the speed of light
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Graduate How do we know that 74% of the universe is dark energy?
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Graduate Quantum Confusion - Does not exist until it's observed and age of universe
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Graduate Constraints, Concept , Kant & Space
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Graduate Redshift Time and the Start of the Solar System
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Stargazing Viewing night sky in the middle of a major city
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Graduate Can Time Exist Before the Big Bang?
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Undergrad Should the Astronomical Unit be replaced by the Light Second/Light Minute Etc.?
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High School Does Space Need to Be Filled for Distance to Exist Between Two Objects?
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High School Need Help Understanding Expanding Universe
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Undergrad Astro Physics Research for Undergrads
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Undergrad The First Three Minutes - Steven Weinberg
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Graduate Relationship between dark energy and the strong force
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Graduate Mirror neutrons all over the science news
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Undergrad Can quasar gets converted into pulsar?
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Graduate What value is expected for baryon to photon density?
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Graduate How Is Satellite Orbit Speed Calculated with Atmospheric Resistance?
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Graduate Images of the Universe: Lasting Through Time
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Graduate Size of universe and quantity of mass
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Undergrad 10^80 particles in observable v unobservable universe
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Graduate Mission to Probe the Universe's Darkest Secrets
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Graduate Is the inverse-square law valid for all cosmological distances?
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Stargazing James Webb Telescope capability ?
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Graduate Planetary Axis Stability: Examining the Role of Moons and Other Factors
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Graduate Collision course trajectory / velocity
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Undergrad G-Forces in Space and the Human Body
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Undergrad Relation between the sol, mass, gravity, and black holes
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Undergrad Heliosphere's Long-theorized Bow Shock Does Not Exist
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Graduate Carried along by the Hubble flow.
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Graduate Need specific Hubble images. Archive does not have them.
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Undergrad Position of the Sun and Moon in ECEF coordinates
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Graduate Tugs from Beyond the Observable Universe
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Undergrad Can gravity increase on its own?
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Graduate How are measurements done in the Doppler Orbitography Radiopositioning
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Graduate Is the Universe Infinite or Just Expanding?
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Graduate How does the graph of V(φ) support the concept of slow-roll inflation?
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Graduate Series of GR questions about universe expansion
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Graduate Are black holes the great organizers of the universe?
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Graduate Spacetime for an anti-black hole?
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Graduate Is the Universe Leaking Energy? Tamara M. Davis
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Undergrad Gravitation - Why don't planets smash into each other?
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Undergrad Mysterious Night Sky Object - Help?
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Graduate Question about supernova kinetic energy
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Graduate Dim Stars: Are There Almost-Black Holes in the Universe?
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Graduate What causes angular momentum in rotating bodies
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Graduate Is the multiverse cosmology or metaphysics?
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Graduate Assumption that Anti-Matter Galaxies Would Emit Detectable Gamma Ray Bursts
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Graduate Is it possible that antimatter would exert antigravity on matter?
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Graduate Does Dark Matter Gather Near Black Holes and Suns?
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Undergrad Question About Light From the Big Bang
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Is it possible that Our universe could be a tiny spec in a say, sandbox?
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Graduate What Does t→0 Mean in Neutron Freeze-Out?
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Graduate Would Jupiter steal matter from our Sun when it reach red giant phase?
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Graduate What Causes Stellar Expansion During Hydrogen Fusion?
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Graduate Pair-instability supernova calculation
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Stargazing Solar and Lunar Eclipse - size of moon
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Undergrad Was There Matter or Energy at the Start of the Big Bang?
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Graduate One of the standard candle methodologies
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Graduate Do Neutron Stars Eventually Decay Into Black Holes?
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Undergrad Why Are Red Giants More Luminous Than Other Stars?
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Graduate Neutron escaping to parallel universe
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Graduate The Shape of the Universe: What is a Flat Universe?
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