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 Help with velocity/redshift/distance law
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Undergrad Is the Sun's Gravitational Effect Stronger at the Equator than at the Poles?
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Undergrad How does Earth sustain its Mag Field?
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Graduate How does the creation of virtual particles allow the universe to accelerate?
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Undergrad Gravitation vs Magnetic and Electric Field
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Graduate Impedance mismatch at the universes edge
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High School Can Humans Survive in a Spacecraft to the Moon?
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Graduate Gravity in 2D Universe: 1/r Decrease?
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Graduate Superluminal Speeds and All That Jazz
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Undergrad What are some freeware options for fitting radial velocity data?
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Graduate Intergalactic Medium: What Is It & What Does It Mean?
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Graduate A Realistic Cosmological Model: 90 Years of Development
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Graduate Ecliptic Longitude and Right Ascension of the Sun
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Graduate Geometry of the Universe varying in time?
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Undergrad Accelerating Universe: Value of Acceleration?
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Graduate What basic cosmo stuff can you calculate from two numbers and two equations?
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Undergrad Why do the Sun's/star's luminosity increase during the main sequence?
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Graduate Universe started from a cosmic singularity
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High School How much of Einstein Online have you read?
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Undergrad Standard gravitational parameter
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High School Why at the south hemisphere the sun rises from the west?
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Undergrad Why Is There a Hexagon Shaped Cloud on Saturn?
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Undergrad Space Based Power: Is it Practical? Safety Concerns & Benefits Explored
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Graduate CNB (Cosmic Neutrino Background)
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Graduate Quantum cosmo test prospects (sampling the literature)
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Graduate Solving Cosmic Age Problem with Interacting Dark Energy Models | arXiv:0809.3627
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Undergrad How much mass do you need to create Gravity?
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Graduate If the gravitation has very very tiny deviation from inverse square law！
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Undergrad Gravity verses electromagnetic attraction
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Graduate Can empty space or emptiness conceive a form from which matter arise?
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Graduate Why does the universe has such a huge amount of Energy?
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Undergrad Does Time Change at Different Depths Inside the Earth?
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Graduate Help with Life expectancy of Main Sequence stars.
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Graduate I am grappling with a big-rip scenario. Anyone knowledgable:
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Undergrad What are causing the Eccentricity of the planets?
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Graduate Background radiation and intensity
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Graduate Could Our Universe Be Just One of Many in a Multiverse Shaped by Dark Energy?
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Stargazing New to astronomy, what telescope should I get?
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Graduate CMB Particle Distribution: Shell or Ball?
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Graduate Space at Singularity: Pre Big Bang Theory?
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Undergrad Image Processing Software; suggestions?
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Graduate Big Bang starting Mass (mater/antimatter)
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Graduate Space is NOT expanding. Where are the holes in this simplistic view?
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High School Relative Intensity in Spectra: What Does It Mean?
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Undergrad Calculating L2 Lagrangian Point: A Beginner's Guide
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Graduate Tolman-Oppenheimer-Volkoff equation
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Graduate Textbook on Numerical Celestial Mechanics
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Graduate What is the Statistical Challenge in Understanding Dark Matter and Energy?
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Graduate Intensity-wavelength graph for emission spectra; why is frequency in the x-axis?
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Hubble down, Repair mission delayed
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Undergrad Epsilon Eridani: 2 Asteroid Belts and an Icy Ring
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Undergrad Position of Planetary systems at given time
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Graduate Dipole Moments of the Planets and the sun
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Undergrad Could a Supermassive Black Hole Destroy Our Galaxy?
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What Do Non-Scientists Think of Color-Enhanced Astronomy Images?
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Undergrad Explore the Holographic Universe Theory
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Graduate Black Hole's Event Horizon dia. and Internal Mass dia. relationship.
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Does Moon have North and South Poles ?
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Graduate What Does 'The Mystery of the Missing Antimatter' Say About Antimatter Scarcity?
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Graduate CMB Clarifications: Understanding the Impact of Expansion and Temperature Shift
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Graduate How can we be sure of a singularity?
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Graduate Are Singularities One-Sided in Terms of Time?
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Comments about an issue in cosmology?
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Graduate Is Matter Re-Emitted After Absorption by a Black Hole?
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High School What Is the Composition of Black Holes?
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Investigating the Authenticity of a Shooting Star Picture
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Undergrad View from the Earth-Moon L5 point?
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Graduate Looking back in time to the Big Bang
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Graduate Cosmological Inflation: Theory and Observations
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Graduate Can the Universe explain itself?
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The Smell of Space: Mystery & Explanation
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Graduate Mass-Radius relation of a Neutron star
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Graduate Supernova gravitation field and Newton
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Graduate Polytropic Models: Solving Problem at Slide 5
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Graduate Cosmology and Energy Quantization in Matter
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Undergrad Gonegahgah's rubber sheet example
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Graduate Help w/ Logic Behind Numbers & CMB Photon Expansion
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Graduate Use Sun to dispose of radioactive waste?
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High School How Has the Universe Expanded Over 13.7 Billion Years?
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Graduate Multi billion dollar experiments
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Undergrad How far can the universe stretch before it reaches its limits?
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Graduate Is Peter & Pinto-Neto's Non-Singular Bounce the Future of Cosmology?
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Graduate What is the size of the Universe when it was only 470 million years old?
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High School Find Longitude of Sun - Learn How Now
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High School Spider free mount for secondary mirror
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Graduate Can Variance of Variances Define Higher Dimensions?
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Graduate The Cause of the Big Bang: Proven Theories
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Graduate Universal constants changing into new ones?
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Graduate More about that gamma burst (the brightest ever recorded)
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Graduate Antimatter gravity hypothesis-question
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Graduate Zeroth Law of Thermodynamics
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Graduate Can a Star Exist with Negative Pressure?
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Graduate Something about The Beginning I could never figure out
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Undergrad Will Sudan Experience a Predicted Minor Impact Tomorrow?
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Stargazing Discover the Capabilities of 25+ Meter Telescopes Beyond Engineering Projects
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Graduate What is the Solar Evaporation Time?
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Graduate Singularity Theorem Proof on IanBay's Site
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High School Hurricane size whirlpool on the Sun
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Graduate ICosmo: an Interactive Cosmology Package
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Undergrad Throwing paper airplane towards space question
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