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.
Searching for Intelligent Life: Understanding Radio Wave Filters
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Black holes, can we see them directly?
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Two black holes separated by more than one Schwarzschild radii
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Is Speed Real and Who Has the Correct Frame of Reference in the Universe?
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Andromeda 5x bigger than previously thought.
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Do the L4 and L5 points travel in a geodesic?
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Where Can I Find Dates and Locations of Future Solar Eclipses?
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Stargazing Leaving Telescope Out: Pros & Cons
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Mystery of the Bright Green Meteor: Is it Common?
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Gravity leaving a permanent indention?
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Stargazing High-Altitude Floating Space Telescope
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The universe should be billions of times brighter than the Milky Way?
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Why is a blackhole a one way ride
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Is the Concept of a Self-Replicating Unmanned Spacecraft Feasible?
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Ratio of Orbital Distance to Transit Time
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What is Gravity? Understanding Its Role in Universe Formation
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Why Don't Black Holes Absorb Hawking Radiation?
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Unraveling the Mysteries of Jupiter's Auroras
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Where Can I Find Tutorials on Orbital Elements Perturbations?
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Calculating the Radius of a Neutron Star
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White Dwarf + Hydrogen Gas: Can It Revive Fusion?
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Where should I begin with Astrophysics?
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Finding the Exact Time of Alignment of Earth, Sun and Center Sun
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Season Indicators: Know When Seasons Start & End
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What Are the Least Researched Topics in Observational Astrophysics?
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Can Gravity Explain the Tilt of Mars and Neptune?
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How Can I Identify Constellations in the Night Sky?
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Speed of Gravity: Is It As Fast As Light?
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Why Symmetry of Tides on Earth (influenced by moon, sun)
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Discover Top Reference Books for Studying the Sun | Nitya's Book Recommendations
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Mysteries of White Dwarf Formation: Massive Diamonds Inside?
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Where Can I Find a Comprehensive Database of Supernovae?
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Coordinate conversion calculator
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Water Flows on Mars: What We Make of This Article
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.Is Water on Mars? Colonization: Frozen or Sent Men?
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Space Exploration and its effect on the Earth's Oxygen supply: I have a question
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Relativistic effects on interior of our sun?
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Just a little question on orbits.
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MySpace Group Hacked And Deleted
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How does gravity affect rotation?
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Random MOND theory / dark matter question(possibly really easy to answer)
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How can a star turn into a black hole, with the law of conservation of mass?
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Stargazing Fixing Vertical Flipping in Prismatic Telescopes: A Troubleshooting Guide
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Why does Jupiter have more gravity than its density should allow?
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Questions on the Movement of Stars
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Do hypernova events really exist, is there any proof for one existing?
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Can we hit black hole's surface without dying?
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White Dwarf Radii: Minimizing Total Energy
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What effects do the collision of galaxies have on the solar system?
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Understanding Kepler's Laws and Parallax in Astronomy
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Dark Matter Evidence: Baryonic & Non-Baryonic
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Why Doesn't This Black Hole Emit X-rays?
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Could Multiple Stars Be Hiding in Eta Carinae's Nebula?
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Why Is the Chandrasekhar Limit Estimated with Unrealistic Assumptions?
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Stargazing First up is M13, 20 exposures of 30 seconds
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How Do Upcoming Surveys Constrain Cosmological Models and Dark Energy?
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Stargazing Telescope Advice for Military Employee in Middle East - $1000 - $2000
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Can Photons Emit Gravitons in the Absence of Black Holes?
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Last edited by a moderator: May 2, 2017
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What would happen if two black holes collided?
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Uncovering the Composition of Space: A Scientific Explanation
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Are Black Holes Universal Recycling Bins?
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The Possibility of Curved Spacetime, Black Holes, and Big Bang. .
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Far Side of Sun: Can Satellites View Opposite Side?
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WMAP and Big Crunch: Is the Universe's Fate Sealed?
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Exploring Binary Pulsar Mechanics: Lagrangian Formulations
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Can Black Holes Transfer Matter Between Universes?
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If Saturn floats, then what happens?
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Discover the Hubble Ultra Deep Field: Deepest Portrait of the Visible Universe
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So what's the currently accepted gravity theory?
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Galaxy defy Kepler? True or bull?
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Astronomy Song Game - Get Creative!
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Converting parsecs to Mega-parsecs
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Align Earth, Sun & Milky Way: Date Revealed
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Is Gravity Like a Bed Sheet and Baseball?
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Stars colliding/meeting up with each other
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Transit of Mercury 2006: Tips for Capturing Photos | Physics Forums Blog
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Formation of the Moon: Did You Catch its Name?
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Is There Liquid Beneath Saturn's Monster Storm?
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What is Space Physics and How Does it Relate to Cosmology and Astrophysics?
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Where Does The Hawking Radiation Go?
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Creating a Time Machine: Can it be Done?
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Earth changing tangental velocity?
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No storm on Earth lasts like the one on Jupiter
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How Would Changes in the Sun's Mass and Earth's Velocity Affect Earth's Orbit?
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Does the PA show that DM/DE is dynamically important in the outer solar system?
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Evaluate the pic : got a black spot in sun
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Could Matter Exist in a Black Hole on the Level of Quarks?
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Max Gravity Boost: Hyperbolic Trajectory from Jupiter
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A question related to solar system
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What Can You See in the Night Sky with the Current Comet?
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Can the Hubble Repair Mission Extend the Life of NASA's Beloved Telescope?
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Would Earth's Rotation Change If the Moon Exploded?
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The sun's gravitational pull on the earth
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Why are the emission lines in the Crab Nebula split into two?
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Astronomy Question: Differences Between Nebula and Death Star
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Varibles/Eclipsing Binary systems
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Does a Geo-Synchronous Satellite Catch a Shadow?
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Are There Habitable Planets Orbiting Alpha Centauri?
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When will Andromeda galaxy look as big as the moon today?
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