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.
High School Could Dark Matter/Energy be the byproduct of annihilation?
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High School Do Satellites and the ISS Use Power to Maintain Attitude Control?
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Undergrad Can gravitational waves gain energy in an expanding FRW spacetime?
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High School How did the universe start and evolve into what it is today?
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Undergrad Jupiter appearing flashy - red on top, blue bottom
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High School Could Nuclear Powered Bulldozers Create a Habitable Cavity for a Mars Colony?
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High School Why the expansion after the "Big Bang" is showed in cylindrical form?
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Graduate Temperature of HII Gas: Intuitive Explanation
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High School Size of universe - rewinding big bang versus "flat" universe
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Stargazing Is the DWARF II a Viable Astroscope?
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High School How did Earth get so far away from other galaxies?
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Undergrad What is Brian Austin Green talking about here?
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Graduate Does WHIM solve the dark matter problem?
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Undergrad Conservation of energy in quasar outflows?
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Undergrad Why are Saturn's moons so bright?
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High School Where Are the To-Scale Diagrams of Alpha Centauri's Orbits?
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High School Meteor detection/prediction: One over Toronto, ON, Canada
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Stargazing Join the occult (Dec. 7th/8th, Moon will occult Mars.)
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High School Neptune: Beauty Beyond Our Standard Eyes
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Graduate How Did Scientists Calculate the Orbital Radius of Jupiter's Moons?
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Undergrad Understanding the Zero Order Universe in Cosmology
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High School Dark Energy, Dark Matter and the Speed of Light
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Undergrad Hubble Parameter as function of time in universe models
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Graduate Understanding 3D Doppler Shift with Satellites
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High School Highschool Student Struggling to Understand Doppler Effect Paper
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Undergrad Have you seen the JWST Observing Schedule?
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Undergrad Why does the core collapse happen so fast in a supernova?
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Undergrad Gravitational binding energy of the sun?
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Undergrad Can a Satellite Maintain its Angular Velocity with Continuous Low Thrust?
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High School Does a contracting universe destroy its black holes?
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Graduate Diffraction Effects and Artifacts in Telescopes like the JWST
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Undergrad Avoiding heat death in an accelerated expanding universe?
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Undergrad JWST Image Reveals Processes Ejecting Material in Star Formation
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Undergrad Tides on a nearly tidally locked planet
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Undergrad How to interpret this new Keck spectrum picture of Jupiter?
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Undergrad Internal energy of a comoving volume increasing as space expands?
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Undergrad Methods for energy harvesting in expanding universe?
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High School Hydrostatic pressure in a bottle of water on ISS
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High School Communication Options With Future Deep Space Probes?
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Undergrad Discover the Universe from Unique Vantage Points | Your Ultimate Guide
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Undergrad Is the Cosmological Constant Problem a Misunderstanding of Zero-Point Energy?
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High School Would the Giant Arc be visible from a hypothetical exoplanet?
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Graduate Coefficient correlation between 2 cosmological probes
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Undergrad Clarification about the size of the Universe
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Undergrad Deviations of conservation laws in cosmological evolution?
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High School Clarification on how old the Universe is
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Undergrad How many apparent horizons could the Universe have?
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Undergrad Sachs-Wolfe effect in a Dark Energy universe?
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High School Light element abundances for He3/H?
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High School Ivuna meteorite from edge of solar system to Tanzania?
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High School Would light travel in a circle at the edge of the observable Universe?
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Undergrad Can there be some kind of photon emission caused by space expansion?
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High School Can physical constants be different in other galaxies?
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High School How hot is the Sun in space? (James Webb related)
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High School Could there be macro objects out there that convert energy to mass?
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High School Possible to see the moons of Jupiter/Saturn with decent set of binoculars?
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High School Gravitomagnetic explanation of Dark Matter
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Undergrad Data Showing Dark Matter Is Not Cold Neutrinos?
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Undergrad Jansky: When Physics Majors Should Expect It
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Stargazing ATLAS observations of the DART spacecraft impact at Didymos
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Undergrad Database of binary star data info within 10 PC of Earth
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Undergrad Can I Find Alternative Eyepieces for My Quantum 5 Binocular?
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Undergrad Kepler orbits for planets of similar masses
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High School Where is General Relativity Applied and When Does the Oblate Earth Matter?
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Undergrad Why Do Galaxies Spin and What Drives Their Motion?
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Stargazing Why does the asteroid Dimorphos leave a trail after impact?
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Undergrad Cosmic Event Horizon – Does it have any real effects?
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Undergrad What are the possible states of cold iron balls?
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Undergrad Particle production in an expanding universe?
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Undergrad Is energy conserved during the formation of local systems?
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Undergrad Orbital Velocities and Mass Distribution in Galaxies
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Graduate Interactive Galactic Dynamics Textbook -- Bovy 2022
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Graduate What is the cause of lunar nodal and apsidal precession?
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High School Gas planets with solid satellites
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High School Can gravitational force have influence on objects at infinitely long distances?
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High School Expansion of Space Itself, rather than due to an Explosion like the Big Bang?
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Undergrad Would it be possible for a black hole to have a "solar system"?
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High School Elbert Another Forgotten Woman who helped advance Science
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High School Distance of Stars / Size of the Universe calculation
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Undergrad Could Passing Asteroids Alter Milanković Cycles and Trigger Climate Change?
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Undergrad Do All Galaxies with Dark Matter Halos Have Flat Rotation Curves?
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High School What is the recession speed today of the matter which created the CMBR?
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High School What Could Explain the Mysterious Beam of Plasma Seen in the Sky in 2017?
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High School Why does the moon appear tilted?
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Undergrad Cosmic Flatness Deduced from CMB
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Undergrad Relationship between geometry and expansion rate
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High School How's it possible that 70% of Earth receives sunlight simultaneously
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High School Degeneracy Pressure: Pauli Principle & Neutron Stars
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High School Bound Systems in an Expanding Universe: How Can Galaxies Merge?
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High School Hexagonal Craters: Airless Worlds & Moons Explored
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High School How Has the Calculation of Solar System Body SGPs Evolved Over Time?
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High School Why are impact craters predominantly circular?
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Undergrad LightCone Calculator Improvements
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Undergrad Identification of matter and dark matter proportions
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Undergrad Interpreting solar event flux units
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High School Time Dimensions: Astronomy & Beyond
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Graduate Cosmic Tidal Force: Measuring CTF With Strain Gauge
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High School So what's your go-to method to locate M31 (Andromeda Galaxy)?
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High School Nodal Precession: Satellites Orbiting Earth Explained
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Stargazing Fixing declination runaway on a Meade LX200 telescope
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