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.
Did You See the Mason Dixon Meteor Streak Across Maryland and Pennsylvania?
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The expanding universe isn't in our neighborhood
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Question on neutrino emission machanism in neutron star
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Japan building space-based power plant
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Planetary Orbits: Decay or Spiral?
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Evolution of Our Sun's Rotation: From 4.5 Billion Years Ago to Present Day
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Question of Galactic Proportions
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The limit of Ultramassive Black Holes.
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Galaxies that can be seen with the naked eye
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Dark Matter: What Is It & How Was It Formed?
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Advanced Astronomy/Cosmology Forum - Get Answers to Your Questions
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The Pioneer Anomaly: Examining Velocity Gained through Gravity Assist Manoeuvres
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Intuitive explanation of the gravity of a sphere
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Angle of the Sun above orbit plane on satellite-centered celestial sphere
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Magnetic Field of the Sun will Flip
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Is there any updated study on the Moon's orbital plane anomaly?
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Can galaxy clusters rotate like individual galaxies?
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How empty are the voids in the universe?
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The Flyby Anomaly: Ranging Data, Transverse Doppler Effect
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Least massive earth like planet possible in the habitable zone?
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What Are the Inclinations of Planetary Orbits Relative to the Sun's Equator?
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Capturing an asteroid in Earth orbit
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Are All the Stars We See Actually Dead?
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View 65 Million Years of Time - Time-Travel Viewer
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The Mystery of WASP-18b: Uncovering the Mass and Rotation of Its Mother Star
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Another expanding universe question
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The Reality of Majoring in Astrophysics: Is it Worth It?
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What Holds People on Earth if Gravity is the Spacetime Fabric?
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Moon-Earth distances and interactions
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Dark Energy, Expansion, and Acceleration.
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Black Holes: Viable Scientific Theory? Or Voo-Doo Science?
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If there is topic Is Our Universe Flat poin me.
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Would We Feel Heat Loss If All Stars Except the Sun Went Out?
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Why Are Orbits Elliptical? Rules of Circular Motion
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Calculating Moon Coordinates During Solar Eclipse of August 11, 1999
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Warping Space in a Craft: Gravity or Conventional Energy?
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Can a Telescope See Itself from 100km Above Earth?
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What is the Case History of Discovering the Speed of Light?
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Why Do Jupiter's Moons Orbit in a Plane?
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How fast do I have to go to get away from an explosion in space
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Orbital Effects of a Significant Mass Increase
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[Advice Needed:] Research in Astronomy/Astrophysics/Cosomology
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Solving Brightness Equation with Procyon: 7L☉ and 11.41 light years
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How do you define at rest in the Universe?
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What Happens to Accreting Brown Dwarfs in the Galaxy?
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What does Newton's universal constant mean and how is it used?
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Escape Velocity and Earth's Gravity
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How Can a Single Radio Telescope Distinguish Between Point and Extended Sources?
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Is there something strange with the gravity during total solar eclipses?
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Light Speed in Vacuum: What's the Significance?
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Green lasers: how much power is too much?
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Autostar Systems: Efficiency of Current Auto-Star Systems
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Why Isn't a Collapsed Star a Black Ball?
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What are the types of waves that can travel through space?
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Calculating Black Hole Matter Absorption and Its Impact on the Universe
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Stargazing Is the Giant Magellan Telescope set to revolutionize ground-based astronomy?
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I can't understand why the sun moves across the ecliptic
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New Telescope Buyer Seeking Expert Advice
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Are There Alternative Theories to Explain Redshift and Universal Expansion?
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Time technically stops after the event horizon correct?
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What Life would see around other Stars
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Can Solar Storms Render All Electronics Useless?
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Cooling of Neutron Stars and Urca-process
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Why is the moon drifting into space
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Spectra Classification: Finding Sources for Stellar Objects
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Are galaxies of antimatter identifiable?
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Black Holes vs. Dark Energy: Who Holds More Power?
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Black holes, white holes, and time
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Is There a Center of Mass to the Universe?
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What is the significance of the Cauchy horizon?
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Anchor a tube on earth and slope it all the way into space
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Could Black Holes Be Portals to Other Universes?
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Expected sound of colliding black holes
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Difference between a red/blue shifted object and one in rest.
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What is the composition of a gas giant's atmosphere?
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Is the physics within the Solar system really understood?
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What Units Should I Use to Calculate Planetary Orbit Time?
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Can You Move a Spaceship By Running and Jumping In It?
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Is the moon closer or further away to us than predicted by Newton
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Does Light Slow Down During Long-Distance Space Travel?
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Would anything survive our sun's eventual nova?
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Are there any objects between Mercury and the Sun?
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Neutron stars and blue/red shifting
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Viewing Earth from the Moon - Would it Stay in One Spot?
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Stargazing Learning How to Use a Telescope on Your Own: Advice and Suggestions
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Energy time relationship from an observer in space
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Has Jupiter Been Bombarded by Another Object?
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Stargazing How do space telescopes detect non-visible light?
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Is There an Upper Limit to Planetary Core Density?
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Proof of planetesimals for asteroid belt?
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What happens when an anitmatter blackhole collides with a matter blackhole?
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Calculating Distance to Cefeide Star w/ Stellar Extinction
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Hawking Radiation: How Do Black Holes Emit?
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Question: How does gravity affect the speed of light in a black hole?
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ISS Toolbag visible with the naked eye now
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Why Don't Heavier Elements Sink to the Sun's Core?
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Stargazing Gravity anomaly during solar eclipse.
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The Expanding Universe: Understanding Hubble's Law
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How likely is a super solar flare?
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Difference between Thermal and Kinetic Energy
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