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.
Undergrad Physics Simulation: Calculating Gravitational Force between Earth and Sun
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Graduate Into what shape does an orbiting sphere get distorted by tidal forces?
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Graduate Information on first planets formed in the universe
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Undergrad Where Can I Find Accurate Data for Simulating Solar System Orbits in Java?
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Graduate Electro magnetic craft levitation at earths magnetic pole possible?
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High School How would you steer a spacecraft?
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Graduate Find Orbital Elements given Orbital State Vectors
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Undergrad The star Betelgeuse going supernova soon?
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Graduate How accurate are simple models of the solar system?
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Graduate Magnetic Fields on Sudarsky Class II Gas Giants
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High School Interested in looking at the night sky
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Graduate Correct Physics for Fictional World
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Undergrad What Determines the Size and Growth of a Black Hole?
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Graduate Collisional Astrophysics Models for Computer Scientists
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Graduate What does a black hole look like from behind?
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Graduate Lunar solstice when the Moon's Equator crosses the Zero Plane of the Earth
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Potential Cancellation of the JWST
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Undergrad Objects in orbit are weightless?
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Graduate If somehow a supernova will be redirected to 30, 45, 60, 80, 90
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Graduate Quantum mechanics and black holes
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High School How Does Gravity Influence the Movements of Planets and Moons?
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Best location for stars with naked eye
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Undergrad Is Iron the Ultimate Killer of Stars?
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Graduate Elliptical Orbits (Using Newton's Model)
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Graduate Hello PF.I would like to get your view on the plausible scenario
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Graduate Gravity modelling of asteroid 433 Eros. Any help will be appreciated.
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Graduate How Do Acoustics in Space Affect Communication with Other Civilizations?
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Stargazing How Do Telescopes Show Us Distant Objects in Space?
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Undergrad NASA Space Shuttle Launches iPhone to Test Radiation Effects
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Undergrad Researching to Become a Theoretical Astrophysicist
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Undergrad What is the ratio of hydrogen to helium in the Sun?
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Graduate When a protostar stops contraction
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Graduate Solar sail using radioactive decay
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Undergrad Could a Swallowed Moon Explain Uranus's Tilt and Magnetic Field?
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Undergrad Why does the permeability of free space invoke pi?
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Graduate Mass distribution inside the event horizon
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Undergrad Relativity & Expansion of Universe: Einstein's Cosmological Constant
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Graduate Primordial Black Holes: Could Spacetime Form BHs?
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High School Can the Earth have an asteroid stuck in permanent orbit like our moon?
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Graduate Top 10 Questions on Leonard Susskind's "The Black Hole War
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High School Landing a Spacecraft: Understanding Gravity in Space
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Graduate Understanding rotation of spiral galaxies
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Undergrad Space Elevators and Other Alternatives
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Graduate Control Systems, State space to Transfer Function
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Undergrad Challenges of Terraforming Mars: Temperature, Air Pressure, and Radiation
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Graduate Helium Abundance in ISM of Galaxies: Best-Estimate Value
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Undergrad Describe some basic concepts for me please?
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Graduate Initial conditions for a halo orbit
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Graduate Variations in the fine structure constant
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Space travel on TV infuriates me
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Graduate How Does Age, Mass, and Magnitude Mathematically Relate in Star Clusters?
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Graduate What Causes the Increase in Area of Black Hole Horizons?
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Graduate In desperate need of some one who can help me.
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Graduate Dark Matter & Its Effects on Regular Matter
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Graduate Skyhook - is this better then space elevator?
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Undergrad How common is it for stars to have rocky bodies orbiting them?
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Undergrad Need help understanding use of cepheid variables
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Undergrad New Star Squirts Water From Poles
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Earth Not From Same Nebula as Sun. Huh?
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Undergrad Are blackholes formed in other ways besides supernovas?
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Undergrad How do electrons and protons interact in atoms?
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Undergrad Calculating RA and Dec from long/lat/time/alt/azm
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How do you pronounce perilune and apolune
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Graduate Yesterday's Nuclear Decay Related to Today's Flare
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Graduate Is Our Universe Really Flat or is it Just Euclidean Jargon?
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Graduate 10 ^18 Amps, Universal Record for Current
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Graduate Extremely Advanced Materials from Manipulation of Space-time
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Stargazing What telescope aperture is needed for spectroscopy of star clusters within MC?
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Undergrad Question about the Moons formation.
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Undergrad Can we explore white dwarfs with robotic missions?
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Graduate Question about the expansion of the universe/inflation
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Graduate Black holes in the early universe
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Graduate Star gets torn apart by massive black hole
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Graduate What is retrograde planetary perihelion precession?
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High School How Do You Locate Saturn and Jupiter with a Medium Powered Telescope?
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Astronomy & 2012: What Does It Mean?
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Graduate How does the Earth-Moon system gain energy despite tidal interactions?
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Stargazing Solar Eclipse - Are we just lucky?
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Graduate Black Hole - Questions (discussion)
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Graduate Speed of light: making non-Newtonian physics tangible
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High School How would I measure the angle of a certain street from true north?
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Graduate What is there actually to say of wormholes at the moment?
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Undergrad Star Swallowed by Galactic Black Hole
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Graduate Will the Expanding Universe Eventually Become Invisible?
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High School View Saturn Through a Telescope: A Noob's Guide
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Graduate Unraveling the Mystery of STEP Mission: What Happened and What's Next?
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Graduate Positions on possible parallel universe theory
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Graduate Does the speed of light change if?
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Graduate Would a Neutron Star Stop a Neutrino?
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Graduate Why are Andromeda and the Milky Way approaching each other?
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Undergrad How are Cepheids used to measure distances?
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Undergrad Can we identify the generation of any star?
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High School View Saturn w/ 1100x120 Reflector: Eye Piece Guide
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Graduate Is the Sun Going Through a Period of Weakening?
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Undergrad How Do We Calculate the Gravity of Different Particles and Celestial Bodies?
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Graduate Neutron Star to Black Hole Via OMG?
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Undergrad Stefans Boltzmann Law: Find Star Luminosity
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Graduate Young star generations: where do they get their Hydrogen?
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Exciting Physics Projects: Get Help Choosing Your Next Project!
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Undergrad Temperature - Effect on atmospheric pressure.
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