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.
Graduate Einstein-deSitter Expansion Questions
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Undergrad What is the Relationship Between the Age and Size of the Universe?
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Graduate Quantum Gravity Explained: What It Is and Resources to Learn More
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Graduate How do QG people evolve particles into the theory?
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High School Can You Hunt for Comets? Understanding the Art of Comet Hunting
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Graduate The spacetime landscape of a black hole
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Graduate Measuring Red Shift with Accuracy
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Graduate Quantum Mechanics and the Universe
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Graduate Does Spacetime Curve Into Hidden Dimensions? Understanding Curvature
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Undergrad What limits the ability to directly image distant objects with telescopes?
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Graduate Earliest time of light emission after Big Bang
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High School Request: comet projectory calculating tool
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Doomsday Scenarios: What Astronomical Process Poses Greatest Risk?
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Dark matter revealed in video feedback
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Graduate Lambda contibutes to bending (says Wolfgang Rindler)
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Undergrad U think that the univers is realy expanding? think again
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Graduate How to Calculate Orbital Approach and Docking in the Presence of a Gravity Well?
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Graduate Is the Fabric of Spacetime a Physical Object?
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High School Suggested Book Recommendations for High School Physics Project
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High School Civilizations in other galaxies?
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Graduate Cold Dark Matter: Bottom-Up vs. Top-Down Structure Formation
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Graduate Does vacuum energy rely on the existence of matter?
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Graduate What would a black dwarf be like?
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High School Astronomy: Get Started with a Telescope Under £250
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Graduate Solidifying space mirrors in space?
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Graduate Creating a Black Hole: Possible?
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High School Why does planets hav eliptical orbits
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Action/reaction : if we do an action that requires energy of the whole universe
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Stargazing Can You Capture Colors on Consecutive Nights with a Telescope?
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Graduate Solving Specific Intensity: A Beginner's Guide
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Graduate Field of Eschatology pertaining to the binary star Wormwood
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Graduate Uncovering the Mysteries of the Universe: Big Bang Questions Answered
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Graduate Alternative to the big bang [new scientist]
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High School Planet & Moon Rotation: Questions Answered for 5th Grade Student
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Undergrad Is Additional Speed Beyond Orbital Velocity Needed for Escape?
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Graduate Is the Universe Really Flat Despite the Existence of Gravity?
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Graduate Is the Universe Flat and What Does That Mean for Its Geometry?
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Undergrad Moon Stopping Velocity & Impact Force: How Long Would It Take?
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Graduate Gravitational Lensing and Frequency-Dependent Light Travel Time
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High School Toys in Space: Designing for Astronauts
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Graduate Bojo in Nature Physics July issue, probing before bigbang with quantum cosmology
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Undergrad What Causes Voids in the Expanding Universe?
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Graduate How long would we live without the sun
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Graduate Do Non-Rotating Neutron Stars Exist?
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Graduate Trying to Understand Time Dilaton
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Comets Heading Towards Earth: True or False?
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Undergrad Problem with the theories about the Sun and the planets
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Undergrad Why do some people deny the evidence for the Big Bang Theory?
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Graduate What is the role of negative gravity in the Big Bang theory?
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Graduate Is the Universe Drawn to a Cosmic Black Hole for a New Beginning?
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Graduate What's Wrong with My Pet Theory of Cosmology?
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Graduate QG Light Time Arrivals & Swiss Cheese Effect
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Undergrad How does the moon's gravity affect the orbit of the ISS?
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Undergrad Is Primary Focus Magnification the Same as Focal Distance Equivalent in Optics?
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Graduate Have some ideas looking for feedback
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Stargazing I Am Cursed Ack Fi My New Telescope hates me
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Graduate Sharper than Hubble, from the ground.
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Graduate Can Planets Be Entirely Liquid and Still Viable in Space?
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Graduate Are all lines through space also loops?
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Only 1 hour to the Aurigids meteor shower (storm?)
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Where Can I Find a Map of Our Galaxy?
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Undergrad Background radiation and photons
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High School What Triggered the Big Bang and Created Our Universe?
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Graduate Modern Cosmology: Science or Folktale?
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Graduate Apparent contradiction with orbital mechanics
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High School Say Hi to Space in 24 Hours: Hover in a Helicopter
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Graduate Can LQC explain the bounce of black holes?
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Graduate Vacuum Energy and Dark Energy: Are They One and the Same?
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Stargazing Did You Know the Moon Dances for Us Every Month?
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Stargazing Are You Prepared for the Upcoming Lunar Eclipse?
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High School Will Mars Really Look as Big as the Moon on August 27, 2007?
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Undergrad Question: Mass distribution in galaxies
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High School The Fascinating Truth About the Moon's Monthly Orbit Around the Earth
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Graduate Hubble's Constant: Calculating Expansion Rate
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Graduate Singularity (Wikipedia and Mathworld definitions)
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High School The Universe - books for youngsters (?)
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Graduate Hawking Radiation: Does an Astronaut Ever Cross the Horizon?
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Graduate The Sun's Final Form: Radius, Mass & Composition
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Graduate What Causes Symbiotic Novae to Re-Explode?
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Graduate Big Bang and absolute simultaneity
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Graduate Could MAGIC IACT Reveal Insights into Quantum Gravity?
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Graduate How do intense magnetic fields cause photons to split or merge?
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Graduate Observing the universe existing simultaneously with us
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Graduate Could a collision cause Venus to rotate prograde?
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Graduate I've got an idea that i would like some help developing
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Undergrad Who was Ralph Alpher and what impact did he have on the world of physics?
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Stargazing Which Telescope Should I Buy for Astrophotography and Viewing?
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Graduate Three video-talks on the CMB and structure of universe
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Graduate Are we just a simulation? (Woit's message to the overlords: Dont turn us off)
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Graduate Supermassive blackholes and galaxy formation.
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Undergrad Number 47: Uncovering Universe's Basic Structure
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High School Examining the Accuracy of "Moon's Orbit Around Earth"
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Graduate IGC Inaugural Conference (Institute for Gravitation and the Cosmos)
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Graduate Why Does the Sun's Surface Gravity Seem So Low Compared to Expectations?
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Graduate Entropy in a contracting universe?
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Graduate 60 efolds with no inflaton, no slow roll, no reheating-QEG's apt to be right
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High School What is the Astonishing Tail of Star Mira Discovered by NASA?
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Undergrad Gamma Ray Bursts: Nature & Why they Last 2 Seconds
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High School Is the Sun an Ordinary or Atypical Star?
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High School How Stars are Formed - Astronomy Basics
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