Astronomy and Astrophysics Forum

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Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
High School Clarification about gravity and floating in space
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Graduate Orbit around the Galactic Center
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High School What was earth like 200,000 years ago?
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Dark Matter/Dark Energy/unified constant? I need answers
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Undergrad How do I map a celestial object's declination ?
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High School How much closer was the Moon say 200,000 years ago?
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Graduate What are Kruskal-Szekeres Coordinates in Relation to a Static Black Hole?
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Graduate Are Galaxies at the Edge of the Universe Concentrated in One Area?
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Graduate Derivation of Earth's Precession: Sun's Torque & Causes
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Graduate Exploring Supermassive Black Holes: Understanding Orbiting Stars and Gravity
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Graduate Can Dark Matter Evaporate in Black Holes? A Theoretical Problem
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Graduate Is Space Pushing Galaxies Apart in the Expansion of the Universe?
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Undergrad How Far from a Gamma Ray Burst to Match Solar Radiation at Earth?
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Graduate Is Life on Jupiter's Moons More Probable Than on Earth-like Planets?
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High School Why is the Earth hotter in July and cooler in January?
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Graduate Solve CMB Peak Wavelength & Quark Fates | Astronomy Problem Help
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Graduate Is My Understanding of Light Spheres in A Brief History of Time Correct?
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High School Unveiling the Mysterious 'Black Star': New Astronomical Discovery
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Graduate Stellar Pancaking, anyone familiar with it?
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High School What Does Our Solar System Rotate Around?
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Undergrad Galactic Center Wobble: A Look at the Dynamics
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Graduate Understanding the Physical Significance of 'a' in Kepler Orbit Equation
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Graduate How do vortices help astronomical structures to form?
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Graduate State of knowledge of dark matter distribution vs Fermi Paradox:Zoo
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Undergrad Food for thought, is law of inertia wronghum
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High School Picturing Galaxies: How We Capture Outer Space
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Graduate Three Body Problem - Earth, Sun, and Moon
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Graduate Proving that there is one center of the universe.
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Graduate Three Questions About Energy-Mass Equivalence
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Undergrad Earth's Axis: What is Figure Axis & Have Astronomers Had to Readjust?
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Graduate Is Zero Gravity in Space Just a Big Free Fall?
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High School Protecting Telescopes from High Humidity: A Practical Solution?
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Graduate Can Supernovas Disrupt Entire Stars Without Remnant?
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Undergrad What drives the magnetic field of Earth and how does gravity play a role?
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Graduate Capturing Light Leaving Its Source: Is it Possible?
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Graduate What is Dark Matter? - Learn Its Properties & Particles
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Undergrad Can the Sun Appear to Revolve Around the Earth from Certain Points in Space?
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Graduate How Can I Improve the Accuracy of My Geostationary Orbit Propagator?
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High School Could Traveling Against the Earth's Rotation Cause a Sunset-Sunrise Reversal?
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Graduate What are the origins of Moon Mascons?
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Graduate Sources of noise in geostationary satellite attitude determination simulation
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Graduate If the strength of gravity levels off, could black holes be unphysical?
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What If Comet SL9 Strikes Mars, the Moon, or Venus?
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Graduate Why is this highly distributed array a bad idea?
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Graduate How Does Uranus' Tilt Influence the Orbits of Its Moons?
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Graduate Can we see the Earth in the past
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  • Poll Poll
Graduate How did the cosmos form w/o observers around?
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Graduate Looking for online solar astronomy book/course
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Undergrad Stars: Fixed or Moving? | RA, Dec & Julian Date
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Undergrad Where does the energy of gravity come from?
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Undergrad Could an ExoEarth with 70% Land and 30% Water Host Unique Life Forms?
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Graduate Can Antimatter Catalysed Engines Propel Us Across the Galaxy?
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Undergrad Reference book about astrophysics please
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High School Astronomy and astrophysics, are they the same?
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Undergrad Reccomend a stellar database for my software program?
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Undergrad The densest areas in the universe
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Undergrad Why Doesn't Earth Fall Into the Sun?
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Graduate Why Were Early Universe Stars More Massive Than Today's Stars?
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High School Explaining Black Holes to 5th Graders
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Undergrad What are Black Holes and How Do They Differ from Dense Balls of Matter?
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Graduate Does expansion exist on the micro level as well as the galactic level?
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Graduate Heat Applied to Black Hole: What Happens?
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Graduate Speed of the Sun: Facts & Measurements
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Graduate Virtual particule and event horizon
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Graduate Pair-Instability Supernovae & No Black Hole Remnant
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Graduate How Many Photons Reach the Hubble Telescope from a Distant Star in a Day?
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Graduate How Do Black Holes Affect Photons and What Mysteries Remain?
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Graduate How Does the Solar System's Angular Velocity Change Over Time?
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Graduate Effects of moon on prehistoric earth
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Graduate Question about black holes and graviational singularities.
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Graduate Could advanced technology artificially accelerate the evolution of our sun?
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Graduate What are the Quantum Mechanics Situations Allowing Light to Escape Black Holes?
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Undergrad Changing Earth's Orbit: How Has the Speed Around the Sun Evolved?
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Question on Binary Neutron Star Importance?
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Stargazing Celestron Astromaster 114EQ Reflecting Telescope: A Beginner's Guide
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Black Hole Density: Facts & Info
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Managing Telescope Aiming: a Sky-Watcher Challenge
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High School How do we know what the sun is made of?
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Graduate Absolute color - magnitude diagram
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What are your views on the future of Space Exploration
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Undergrad Need Controversial Topic for an Eng102 Class
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Undergrad Calculate the final velocity of an object accelerating towards a mass
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Graduate So what happen to a shuttle that enters a black hole?
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Undergrad Exploring Kinetic Energy & Recessional Velocity
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Undergrad Build Space Dirigibles: Alternative Freighter Idea
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Graduate Bolometric Magnitude and H-R diagram
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Player Pays $330k (US) for Space Station in Project Entropia Universe
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Undergrad Variation of gravity along latitude
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Graduate How do I calculate the phase integral for the Bond albedo in astrophysics?
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Graduate Is Relative Motion Evidence of a Static Aether in Orbital Physics?
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What is the difference between astrology and astronomy?
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How to crack weird space cases: by Jim Oberg
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Undergrad Will we go the the past if we could go faster than speed of light?
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Graduate Dark Matter Particles: Not Atoms? Strings? Bubbles?
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Undergrad Hawking Radiation: Rate of Decay & Mass
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Undergrad Expansion Algorithm: Acceleration Over Time
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  • Poll Poll
Graduate Nagging Doubts just won't go away(song)
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Undergrad An asteroid is orbiting around the sun at a distance of 4.2
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Undergrad Difference between hot and warm pixels?
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Undergrad Learn Astrophysics: Self-Study Tutorials & References
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