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 What is the alternative to the concept of a singularity in cosmology?
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High School Frequency of supernovae in the universe
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Graduate Supernova types 1a and the accelerating cosmos
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Stargazing What can I get to improve telescope
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Undergrad Spacetravel: t as a function of a and d
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Stargazing Liquid Mirror Telescope: How to create a parabolic shape
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Graduate Exploring the Big Bang: The Role of Quark Collision Experiments
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Graduate How Can an Infinite Universe Expand?
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Graduate Are there any theories about why causality appears?
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Graduate What do we mean by Is the universe losing energy ?
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Are we going to continue to expand.
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Graduate What Are Gravity, Dark Matter, and Atoms?
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Graduate Can Traveling Through a Black Hole Lead to Another Dimension?
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Graduate Could the universe's energy density have been greater in the past?
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Graduate What Caused the Universe to Come Into Existence?
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Graduate How is Lorentz Contraction Manifested in a Distant Supernova?
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Graduate Cosmology at differing values of c?
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Graduate What Are Some Recommended Graduate Level Texts on Stellar Spectroscopy?
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Undergrad Gravitational Waves: Origin & Mass Impact
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Undergrad Question re: Planets Facing Each Other
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Graduate Let's try something-let me know if you have difficulty
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Graduate A white dwarf formed by a supernova, possible?
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Undergrad How Can You Calculate the Area of Light Hitting a Dome?
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Graduate When was the last time all inner planets aligned in our solar system?
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Graduate How cant EM wawe escape from a black hole?
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Undergrad Moon's Escape Point: Beyond Earth's Gravity
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Undergrad Water found on distant planet (hot Jupiter at 63 LY)
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Graduate Is Consciousness a Process Inherent in the Universe?
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Graduate Using JPL Horizons to Obtain Inertial Positions and Velocities: A Tutorial
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Graduate Wright's 'best fit' universe does not expand out into empty space
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Undergrad What is the accepted diameter of the universe?
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Graduate How Could Quantum Foam Shape Our Understanding of the Cosmos?
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Do you unfriend people on Facebook/Myspace?
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Graduate Black Holes & Light: Can Gravitational Force Exceed Speed of Light?
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What will be the after effects of the suns polar magnetic shifts?
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Undergrad Black Hole Radius: Facts & Theory
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Undergrad Does the Saros Cycle Provide Accurate Eclipse Predictions Across Time?
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Graduate Model a Cooling Sphere: Finding Resources
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Graduate Will cosmic microwave background disappear?
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Graduate Another paper helping to clarify expansion-congrats, authors :-)
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What is the empty space in an unopened 2 liter bottle of soda?
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Stargazing Great Canary Telescope - First Light
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High School UFO-Inspired Future Spacecraft: Faster Than Mach 4?
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Graduate Is this line element known to anyone ?
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Graduate Selecting a Recent Space/Astro Physics Research Topic
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Graduate How does the age of the Universe relate to the Big Bang theory?
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Explore the Universe with Galaxy Zoo
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Graduate Expanding Space: the Root of all Evil?
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Graduate Redshift 9, oldest galaxies seen yet
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Undergrad Question regarding sun/moon angle
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Undergrad Does Superconductivity Occur in Outer Space?
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Graduate The Mystery of Aurora Borealis: Electron Acceleration
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Graduate Hubble Parameter & acc. Universe
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High School What can I see with my Sky Watcher telescope?
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Graduate Pre Big Bang universe discovered ?
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How to find any naked-eye object
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Undergrad Understanding the Expansion of the Universe Through Low Mass Star Death
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Graduate Big Bang Question: Is Our Universe Expanding Through Vacancy?
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Undergrad What Natural Laws Influence Human Artistic Expression?
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Graduate Simulating the gravitational interaction between two material points
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Graduate Shining light thru the sun: evidence of axions?
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Graduate How would the solar system capture an extra solar planet ?
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Graduate Is Our Universe Just a Preon in a Larger Cosmic Structure?
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High School Taking Pictures From Outer Space: Color or B&W?
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Graduate 'Spinning' the truth about our own Moon?
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Which Planets Are Visible Today?
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High School Why the Moon Doesn't Fall on the Earth
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High School Full Moon Height: When is It Highest?
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Graduate without resorting to scalar fields
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Graduate Another Neptune in the Oort Cloud
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Graduate Is Gravitational Radiation the Key to Unlocking Cosmology's Secrets?
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Graduate On the 'constantness' of Hubble's Constant
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High School Liftoff for Ceres and Vesta (July 2007)
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Graduate Can MOND be ruled out at laboratory scale?
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Graduate Lyman Page new idea for CMB observations
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Graduate Collapsing Stars: White Dwarfs, Neutron Stars & Singularity
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Undergrad Looking once around the universe
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Graduate MOND-related Formula in GR Calcs at Cosmological Scale
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Undergrad What is the impact of the moon's mass on Earth's orbit around the sun?
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Graduate Ratio of radiaton energy to mass energy?
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Graduate Are Parallel Universes Possible According to M-Theory?
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Undergrad Julian Days: Guide to Formula & Calculations
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Graduate The link between the cosmological constant and the higgs field
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Graduate Review of Dark Matter and Dark Energy by M. Kamionkowski
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Graduate Black Holes: X-rays, Gamma Rays & Light Emission
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Graduate Is the Existence of Black Holes Debated Among Astrophysicists?
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Graduate What Is the Expansion Limit of Our Universe?
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High School Mirror Grinding Kits: Wave Aspect Explained
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Graduate Nice thumbnail sketch of Earth's future by John Baez
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Graduate Theoretically Possible: Opening a Wormhole to Another Location
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Undergrad Could Extraterrestrial Life Exist in Unique Environments Like Titan?
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Graduate X-ray background/peculiar velocities and the Big Bang
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Graduate Physical basis for dark energy-I think Bojo found it
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Undergrad Unveiling the Mystery of Light: How Does it Move?
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Undergrad Catastrophic Nova: Definition & Explanation
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Graduate Condition for inflation presented by Liddle
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High School Video Recommendations for Black Holes & other space-related phenomena
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Graduate Oldest Black Hole - Age of the Universe Explained
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Graduate Giant Solar Laser: Harnessing Energy from the Sun
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Undergrad Star Collapse: Why Not in Early Stages?
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