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.
Graduate What effects do the collision of galaxies have on the solar system?
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High School Understanding Kepler's Laws and Parallax in Astronomy
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Graduate Dark Matter Evidence: Baryonic & Non-Baryonic
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Graduate Why Doesn't This Black Hole Emit X-rays?
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Graduate Could Multiple Stars Be Hiding in Eta Carinae's Nebula?
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Graduate 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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Graduate 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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Graduate Can Photons Emit Gravitons in the Absence of Black Holes?
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Undergrad Last edited by a moderator: May 2, 2017
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Graduate What would happen if two black holes collided?
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Undergrad Uncovering the Composition of Space: A Scientific Explanation
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Undergrad Are Black Holes Universal Recycling Bins?
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Graduate The Possibility of Curved Spacetime, Black Holes, and Big Bang. .
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High School Far Side of Sun: Can Satellites View Opposite Side?
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Graduate WMAP and Big Crunch: Is the Universe's Fate Sealed?
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Graduate Exploring Binary Pulsar Mechanics: Lagrangian Formulations
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Graduate Can Black Holes Transfer Matter Between Universes?
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Undergrad If Saturn floats, then what happens?
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Undergrad Discover the Hubble Ultra Deep Field: Deepest Portrait of the Visible Universe
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Graduate So what's the currently accepted gravity theory?
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Undergrad Galaxy defy Kepler? True or bull?
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Astronomy Song Game - Get Creative!
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High School Converting parsecs to Mega-parsecs
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High School Align Earth, Sun & Milky Way: Date Revealed
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Undergrad Is Gravity Like a Bed Sheet and Baseball?
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Graduate Has the Three Body Problem Ever Been Solved?
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Undergrad 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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Undergrad What is Space Physics and How Does it Relate to Cosmology and Astrophysics?
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Graduate Where Does The Hawking Radiation Go?
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Creating a Time Machine: Can it be Done?
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Undergrad Earth changing tangental velocity?
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High School No storm on Earth lasts like the one on Jupiter
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Undergrad How Would Changes in the Sun's Mass and Earth's Velocity Affect Earth's Orbit?
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Graduate 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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Graduate Could Matter Exist in a Black Hole on the Level of Quarks?
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Graduate Max Gravity Boost: Hyperbolic Trajectory from Jupiter
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High School A question related to solar system
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High School 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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Undergrad Would Earth's Rotation Change If the Moon Exploded?
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High School The sun's gravitational pull on the earth
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Undergrad 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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High School Varibles/Eclipsing Binary systems
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High School Does a Geo-Synchronous Satellite Catch a Shadow?
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Undergrad Are There Habitable Planets Orbiting Alpha Centauri?
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Undergrad When will Andromeda galaxy look as big as the moon today?
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Undergrad The Dominant Source of Earth's Surface Heat: Solar Radiation or Interior Heat?
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Undergrad Lunar Phase Change with Reversed Moon Orbit
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High School What Is Galactic Motion and How Is It Explained?
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Undergrad Why Hasn't the Kuiper Belt and Scattered Disc Coalesced into a Planet?
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Undergrad IAU Redefines the Solar System: 12 Planets, Countless Possibilities
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High School Conveyor Belt on Sun: What is it & How Does it Link to Solar Storms?
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Solar Storm Ideas: Share Your Thoughts Here
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Graduate Effect of dark matter on solar system dynamics
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Graduate Does Kepler's Third Law Account for Dark Matter in Galaxy Rotation Curves?
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Undergrad Solar wind + Weak magnetic field = No water?
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Graduate Turbulence pressure in convection zone
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Undergrad What Properties Can Be Extracted from the Hipparcos Catalogue?
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Undergrad ExoPlanet Hunting: Observing Stars with Celestron C11 XLT
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Stargazing How does the reappearance of Io during an eclipse relate to linear lighting?
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Saturn's Rings Backlit: Glorious Detail & Light
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Graduate What Theories Explain Quasar Energy Concentration and Their Challenges?
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Graduate What Are the Effects of Extreme Pressure on Electron Degenerate Matter?
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Graduate Would an Object Fall Straight Through a Hole in a Spinning Planet?
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Graduate What are the leading theories behind the formation of dwarf galaxies?
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Undergrad Proving Venus's Orbit is 0.72x Earth's: Understanding Greatest Elongation
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Undergrad Can Gravity Create a Perpetual Motion System in Planetary Orbits?
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Undergrad Horizontal system of celestial coordinates
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Getting Ready to Stargaze: My Orion Atlas 11 Arrives Soon
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Undergrad Gravitational pull is related to rotational speed?
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Undergrad What Is the Significance of Zero Right Ascension in Astronomy?
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Graduate Do galaxies have a negative mass defect?
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Undergrad Measuring the absolute value of the AU
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Graduate Does the Maximum Entropy of a Black Hole Allow for Hawking Radiation?
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Graduate The possiblity of a solid planetary disk
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Graduate How to Solve Tolman-Oppenheimer-Volkov Equations for Neutron Stars?
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Graduate Mass of Black Holes: Measuring the Unmeasurable?
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High School Finding Cruithne's Orbit & Return to Earth's Orbit
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High School Earth's Celestial Poles: North and South
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Graduate The Supernova Legacy Survey (SNLS)
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Graduate New Nature Paper: Old Ia Supernovae different?
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Will NASA's Hubble Servicing Mission Save the Telescope?
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Evaluate the pic : got a black spot in sun
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Graduate Why Can't I Solve This Kepler's Law Problem Correctly?
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Graduate What Causes a White Dwarf Star to Exceed the Chandra Mass Limit and Explode?
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Stargazing I want to build my telescope any advice ?
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High School Astronomy in West LA: Can You Observe with a Telescope?
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Undergrad How Big Would A Planet Have To Be To Have Earth's Gravity?
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Graduate How can a neutronstar that only consists of neutrons
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Undergrad Physical properties of objects that orbit each other in the universe
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Graduate What is the mystery behind the puffy planet HAT-P-1?
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See Sunset from Space: Orange Clouds?
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Graduate Double Lobed Radio Galaxies & Seyfert Galaxies: Similar Energy Sources?
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