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 Pulsars vs. Brown Dwarves & Blue Giants: A Celestial Q&A
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Undergrad What happens when one's gravity attracts the other?
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Stargazing What Size and Material Should I Use for My Refractor Telescope Tube?
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Graduate The art to become special and a bounce
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Graduate (problem) Spherical trigonometry and star declination
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Stargazing Can we see human history through a telescope?
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Graduate Dimensional analysis on Luminosity
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Stargazing Optic Quality and Useful Magnification of the Orion Skyview Pro 6 Telescope
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Graduate How Does Heat Transfer Occur in Neutron Stars?
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Stargazing Can i use a watch glass as a primary mirror of dobsonian telescope?
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Undergrad Applying Runge-Kutta(RK4) method to planetary velocity
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High School Can Dark Matter and Black Holes be Associated in Earth's Rotation?
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Graduate Which conserves energy better? Expanding space or Shrinking matter?
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Graduate How Could the Big Bang Avoid Being a Black Hole?
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Stargazing Magnification of dobsonian telescope
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Graduate Calculating Optical Interferometry Telescope Resolution
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Undergrad Evidence of the age of the universe
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Undergrad The redshift is how far/long ago?
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Undergrad Rebuttle of Black hole arguments
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Graduate Scientists Say Time is Slowing Down
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Graduate Black Hole Temperature and Entropy
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Undergrad Analemma Visualisation: 3D Graphics & Visualisations
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Stargazing Primary mirror for dobsonian telescope
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Undergrad Graph Right Ascension & Declination on Globe Graph
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Graduate Is the whole Universe expanding, or just the Observable Universe?
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Graduate Is Part of the Observable Universe Moving Faster Than Light?
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Graduate Why isn't it possible that gravity is repulsive at long distances?
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High School Is Dark Matter a solid, gas or liquid?
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Graduate Is the cosmological prinicple wrong? Is Big Bang wrong?
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High School What Is the Time Scale for the Heat Death of the Universe?
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Undergrad Altitude and Azimuth of the Sun on the Summer Solstice at the Tropic of Cancer
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Graduate The magnetic field as dark matter
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Graduate Can Two Black Holes Really Collide, Even If They Were Once Stars?
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Graduate Theoretical Resolution of Hubble
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Graduate Final temperature in a de-Sitter universe
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High School Understanding Life Support Systems
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Graduate Proving Expanding Black Body Problem: A Question
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Undergrad Apparent Magnitude of planets as seen from earth
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Graduate Clarification on Cosmic Expansion
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Stargazing Question on Refractor Telescope
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Undergrad Spectral and Luminosity Classification
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High School Stargazing 101: Adjusting for Hemisphere
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Graduate Accelerating Motion in Space: Virtual Particles?
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Graduate Orbit Semimajor Axis and Eccentricity after increasing V
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Graduate Discovering Anomalies: Extra-Galactic Meteor Observed by Russian Scientists"
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Graduate Neutron degeneracy pressure and electron degeneracy pressure
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Undergrad Need Help Creating Moons for Fiction Story
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Undergrad Rotational Forces in Galaxies: Gas & Beyond
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The creation of our solar system?
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High School Question about infinite space and time
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Undergrad Why 24 hours for right ascension?
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Graduate Traces of ‘Mythical’ Cosmic Strings Found
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Graduate LIGO detects no gravitational waves from gamma ray burst
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Graduate A Galaxy Beyond Gravity and the Hubble Flow
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Undergrad August 2006 article promoting MOND
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Graduate Newbie to this forum with a silly question
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Graduate Explanation of changing particles within a blackhole
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Stargazing How to Make a Parabolic Mirror for a Telescope at Home?
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First pictures From Mercury in 30 yrs.
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High School What Are the Best References for Exoplanet Data and Information?
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Undergrad The ecliptic planes of the Milky Way and the solar system
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Undergrad Quick question with regards to self-study
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Graduate Is String Theory Consistent with MOND and TeVeS?
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Stargazing Want to run out and buy a better telescope
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Stargazing Meade 10" Starfinder EQ Telescope - Buy Now on eBay
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High School Questions About Space: Is Travel Circular? Can You Reach Big Bang Light?
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Undergrad Kepler's Law: Error Analysis & Mass of Earth
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Undergrad Why Don't We Feel the Universe's Expansion?
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Undergrad How do i find out how much energy a 20solar M BH would radiate given that
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Help finding Kip Thorne web course
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Graduate Antimatter clouds and gamma rays
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Graduate How can simulations help us measure dark energy and its effects on the universe?
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High School Difference between astronomy and cosmology
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Graduate Why Invest Billions in LIGO if We're Certain About Gravity Waves?
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Undergrad Do we observe fast moving objects in the universe?
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Undergrad Does dark energy have anything to do with expansion?
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Undergrad SPACE.com: Source of Mysterious Antimatter Found
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Undergrad Mirroring sun with parabolic dish
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Graduate Neutron Star Mass: Understanding the Chandrasekhar Limit
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Graduate How does the Virial Theorem derivation for <K>=-<delta(U)> work?
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Graduate What Can We See at the Origin Point of the Big Bang?
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High School Typical stellar distances of visible stars in the Milky Way
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High School Questions about Zhumell 3x Barlow for 12" Dobsonian Telescope
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Graduate Can Traveling at the Speed of Light Lead to Time Travel and Other Mysteries?
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Graduate What will happen if GP1 fails to confirm GR and another model is favored?
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Describe the universe in 15 words
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Graduate Beyond the Big Bang (mid-level book, 600 p, August 2008)
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Mars Express Images from ESA's Mars spacecraft
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High School Could I Have Seen the Horsehead?
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Graduate Internal G=1 unit conversion/systems for simulation timestepping
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Graduate What happens to atoms when they enter a black hole?
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High School Did supernovae have anything to do with the solar creation?
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Undergrad Is NASA prepared for a potential Mars-impacting asteroid?
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Graduate Noise Removal in Radio Telescope Observations
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Undergrad Was the Dust Cloud Surrounding Proto-Earth Hot or Cold?
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High School What would make a star flash red and blue?
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Graduate Can Black Holes Really Rip Apart Atoms and Light?
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Graduate Is it possible for a black hole to eat an entire galaxy?
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Graduate Unveiling the Mysteries of Quasars and their Energetic Emissions
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Graduate If the universe is getting colder, wouldn't this violate the 2nd Law?
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