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.
Potential Cancellation of the JWST
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Objects in orbit are weightless?
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If somehow a supernova will be redirected to 30, 45, 60, 80, 90
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Quantum mechanics and black holes
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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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Is Iron the Ultimate Killer of Stars?
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Elliptical Orbits (Using Newton's Model)
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Hello PF.I would like to get your view on the plausible scenario
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Gravity modelling of asteroid 433 Eros. Any help will be appreciated.
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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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NASA Space Shuttle Launches iPhone to Test Radiation Effects
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Researching to Become a Theoretical Astrophysicist
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What is the ratio of hydrogen to helium in the Sun?
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When a protostar stops contraction
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Solar sail using radioactive decay
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Could a Swallowed Moon Explain Uranus's Tilt and Magnetic Field?
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Why does the permeability of free space invoke pi?
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Mass distribution inside the event horizon
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Relativity & Expansion of Universe: Einstein's Cosmological Constant
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Primordial Black Holes: Could Spacetime Form BHs?
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Can the Earth have an asteroid stuck in permanent orbit like our moon?
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Top 10 Questions on Leonard Susskind's "The Black Hole War
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Landing a Spacecraft: Understanding Gravity in Space
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Understanding rotation of spiral galaxies
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Space Elevators and Other Alternatives
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Control Systems, State space to Transfer Function
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Challenges of Terraforming Mars: Temperature, Air Pressure, and Radiation
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Helium Abundance in ISM of Galaxies: Best-Estimate Value
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Describe some basic concepts for me please?
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Initial conditions for a halo orbit
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Variations in the fine structure constant
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Space travel on TV infuriates me
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How Does Age, Mass, and Magnitude Mathematically Relate in Star Clusters?
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What Causes the Increase in Area of Black Hole Horizons?
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In desperate need of some one who can help me.
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Dark Matter & Its Effects on Regular Matter
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Skyhook - is this better then space elevator?
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How common is it for stars to have rocky bodies orbiting them?
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Need help understanding use of cepheid variables
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New Star Squirts Water From Poles
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Earth Not From Same Nebula as Sun. Huh?
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Are blackholes formed in other ways besides supernovas?
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How do electrons and protons interact in atoms?
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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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Yesterday's Nuclear Decay Related to Today's Flare
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Is Our Universe Really Flat or is it Just Euclidean Jargon?
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10 ^18 Amps, Universal Record for Current
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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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Question about the Moons formation.
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Can we explore white dwarfs with robotic missions?
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Question about the expansion of the universe/inflation
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Black holes in the early universe
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Star gets torn apart by massive black hole
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What is retrograde planetary perihelion precession?
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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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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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Black Hole - Questions (discussion)
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Speed of light: making non-Newtonian physics tangible
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How would I measure the angle of a certain street from true north?
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What is there actually to say of wormholes at the moment?
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Star Swallowed by Galactic Black Hole
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Will the Expanding Universe Eventually Become Invisible?
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View Saturn Through a Telescope: A Noob's Guide
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Unraveling the Mystery of STEP Mission: What Happened and What's Next?
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Positions on possible parallel universe theory
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Does the speed of light change if?
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Would a Neutron Star Stop a Neutrino?
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Why are Andromeda and the Milky Way approaching each other?
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How are Cepheids used to measure distances?
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Can we identify the generation of any star?
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View Saturn w/ 1100x120 Reflector: Eye Piece Guide
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Is the Sun Going Through a Period of Weakening?
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Neutron Star to Black Hole Via OMG?
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Stefans Boltzmann Law: Find Star Luminosity
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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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Temperature - Effect on atmospheric pressure.
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Black Hole Mass Flows: Is the Balance 0%?
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What is the significance of hour angle in astronomical observations?
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Gravitational perturbations = tidal forces?
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Are Black Holes Hot? A Deeper Look
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Planet orbital location database
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Can Black Holes be Propelled by Ion Engines?
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What happens when a second mars appears?
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Spectacular solar eruption 7 june 2011
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What is the efficiency of the Sun, really?
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Big Bang With No Center Fallacy?
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New Supernova Discovery Shines Bright
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Searching for list of measurements of moon-earth distance.
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DARK MATTER: it was always there
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Big surprise - Magnetic foam at edge of heliosheath.
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Does the temperature stay the same above a certain point?
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Black hole growth paradox question
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Stargazing Skywatcher Skyliner 150P Dobsonian questions
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