Astronomy, Astrophysics, Cosmology Forum

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Join in expert discussion on the topics of Astronomy, astrophysics and cosmology. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
Undergrad The Mystery of WASP-18b: Uncovering the Mass and Rotation of Its Mother Star
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Graduate Another expanding universe question
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High School The Reality of Majoring in Astrophysics: Is it Worth It?
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Graduate Speed of light effected by expansion of space?
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Undergrad Doppler effect and expanding universe
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Graduate What is a cosmic red-out and how does it relate to the collision of galaxies?
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Undergrad What Holds People on Earth if Gravity is the Spacetime Fabric?
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Undergrad Moon-Earth distances and interactions
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Graduate Dark Energy, Expansion, and Acceleration.
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Graduate Accelerated expansion without Dark Energy?
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High School Is the 2006 edition of The Elegant Universe DVD worth the extra features?
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Graduate 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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High School Would We Feel Heat Loss If All Stars Except the Sun Went Out?
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Cosmic Darwinism - Definition & Overview
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Graduate Hawking Radiation: Theory & Evidence Behind Black Hole Emission
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Graduate The Production and Behavior of Dark Matter Neutrinos
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Graduate Could Parallel Universes Really Collide?
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Graduate Is there good evidence we live in Block Universe?
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Undergrad Why Are Orbits Elliptical? Rules of Circular Motion
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Graduate Is Dark Energy Really Constant? New Evidence from Multiple Surveys
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Graduate Calculating Moon Coordinates During Solar Eclipse of August 11, 1999
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Graduate Warping Space in a Craft: Gravity or Conventional Energy?
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Undergrad Can a Telescope See Itself from 100km Above Earth?
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High School What is the Case History of Discovering the Speed of Light?
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High School Why Do Jupiter's Moons Orbit in a Plane?
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Graduate How fast do I have to go to get away from an explosion in space
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Graduate What Lies Beyond the Edge of the Universe?
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Graduate How do you create the big bang inside metamaterials?
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Graduate Orbital Effects of a Significant Mass Increase
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Graduate [Advice Needed:] Research in Astronomy/Astrophysics/Cosomology
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Undergrad Solving Brightness Equation with Procyon: 7L☉ and 11.41 light years
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Graduate How do you define at rest in the Universe?
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Graduate What Happens to Accreting Brown Dwarfs in the Galaxy?
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Undergrad Galaxy Recession: Explaining Hubble's Law
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Undergrad Choices in Multiverse: Do People Differ?
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Graduate Does the conservation law prove that energy is eternal?
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High School What does Newton's universal constant mean and how is it used?
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Graduate Before the Big Bang now a topic for wider audience
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Graduate Escape Velocity and Earth's Gravity
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Graduate Understand Bubble Nucleation in Phase Transition - Analogy/Figuration
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Graduate Is the Cyclic Model of the Universe a Viable Alternative to the Big Bang Theory?
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Graduate How Can a Single Radio Telescope Distinguish Between Point and Extended Sources?
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High School Does Space Move? Answers to Your Questions
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Graduate Is there something strange with the gravity during total solar eclipses?
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Undergrad Light Speed in Vacuum: What's the Significance?
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Graduate How Do You Calculate the Weight of a Black Hole?
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Graduate The Curvature of Space: Understanding the Flatness of the Universe
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High School Green lasers: how much power is too much?
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Autostar Systems: Efficiency of Current Auto-Star Systems
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Undergrad Why Isn't a Collapsed Star a Black Ball?
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Undergrad What are the types of waves that can travel through space?
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Graduate 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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Graduate Accelerating expansion of the universe.
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Graduate Amplitude of velocity perturbations at last scattering
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Undergrad Why can't light escape a black hole?
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What Triggered the Big Bang According to 'The Universe' on History Channel?
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High School I can't understand why the sun moves across the ecliptic
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High School New Telescope Buyer Seeking Expert Advice
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Question about Expansion and the Center of the Universe
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Graduate Cosmic Darwinism featured in new view of the universe
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Graduate The Relationship Between Distance and Brightness in Cosmology
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Graduate The singularity moment at the beginning of the universe
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Graduate Are There Alternative Theories to Explain Redshift and Universal Expansion?
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Graduate Time technically stops after the event horizon correct?
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Graduate Model Universe: Calculating Gravitational Info Rate
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Graduate What Life would see around other Stars
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Undergrad Black holes and conversation of energy
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Graduate CMB Flux Density: Deriving For Present Cosmology
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Undergrad Can Solar Storms Render All Electronics Useless?
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Graduate Red Shift - From Dark Material Or Recession?
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Graduate Cooling of Neutron Stars and Urca-process
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High School Why are the distant stars so far apart?
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Undergrad Why is the moon drifting into space
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Undergrad Joining two orbiting space vehicles
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Undergrad Spectra Classification: Finding Sources for Stellar Objects
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Graduate How does the expansion of the universe affect redshift?
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Graduate What Could Cause a Big Crunch in the Expansion of the Universe?
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Graduate Are galaxies of antimatter identifiable?
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Graduate Black Holes vs. Dark Energy: Who Holds More Power?
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Graduate Black holes, white holes, and time
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Undergrad Is There a Center of Mass to the Universe?
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Graduate What is the significance of the Cauchy horizon?
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High School Anchor a tube on earth and slope it all the way into space
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Graduate Could Black Holes Be Portals to Other Universes?
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Graduate Could Minor Density Variations in the Universe Solve the Flatness Problem?
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Graduate Expected sound of colliding black holes
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Undergrad Redshift of Far Galaxies: What Causes It?
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Undergrad Difference between a red/blue shifted object and one in rest.
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High School What is the composition of a gas giant's atmosphere?
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Graduate Is the Higgs field the substance that fills the universe?
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Undergrad Hopefully not too stupid question about gravitational waves
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Graduate Is the physics within the Solar system really understood?
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Graduate What Units Should I Use to Calculate Planetary Orbit Time?
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High School Can You Move a Spaceship By Running and Jumping In It?
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High School Is the moon closer or further away to us than predicted by Newton
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Graduate A question about the flatness of the universe.
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Undergrad Does Light Slow Down During Long-Distance Space Travel?
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Undergrad What is the relation between redshift and absorption lines in galaxies?
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