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 Dark Energy & Expanding Universe: Newtonian Perspective
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High School Does the Earth get bigger from the sun?
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Graduate Expansion and Conservation of Energy
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Undergrad What are the best RSS feeds for the latest astrophysics research?
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Graduate If the big crunch occurred, would time go backwards?
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Undergrad Calculate Orbital Period of Earth: GM & a for t in Years
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Graduate What are the Names of the Points on a Space Elevator's Path?
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Stargazing How Does Atmospheric Turbulence Affect Lunar Eclipse Shots?
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High School Some very basic Astronomy questions
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Graduate What Is the Mechanism Behind Dark Flow?
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Graduate How Does Gravity Influence Our Understanding of Time Since the Big Bang?
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High School What Did the Universe Look Like from the Big Bang to Now?
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Graduate Empirical measurement of the expansion of the universe
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Graduate Is Quantum Astrophysics a Subfield of Astrophysics?
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Undergrad Is Time Affected by Space in the Universe?
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High School I think Eddington cooked the books .
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Stargazing Rare Total Lunar Eclipse on Winter Solstice - Dec 21 @12:29AM EST
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Graduate Maximum redshift - can it move light off the scale?
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Graduate Universal fractal structure and the infinite universe
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Graduate Detecting Dark Matter with Germanium Atoms
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Undergrad Number of intelligent civilizations over the history of the galaxy
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Undergrad The Space Tent: A Revolutionary Idea for Structuring Martian Towns
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Graduate Is the popular understanding of C.M.B.R. too simplistic?
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High School Is the Universe Like the Inside Of A Spherical Mirror
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High School What is a Morton Wave on the Sun?
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Graduate What would happen if two black holes collided?
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Undergrad What Happens When We Cool and Slow Down Solar Particles?
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Undergrad Is space an insulator? Why do satellites stay warm?
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Undergrad Blocks of empty space within the known universe
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Graduate Is the Cosmic Expansion Merely a Result of Heisenberg's Uncertainty Principle?
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Undergrad Dust or Suns: Which Contributes More to Dark Matter in Space?
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Graduate Life and the size of the universe
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Undergrad Trajectory of object around the moon as function of time
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Graduate Pulsar Timing Accuracy: Fractional Instability to 10^-15
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High School Understanding Moon Phases: Examples & Visualization
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Graduate How much will the planck mission resolve about the universe.
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What is the Purpose of Black Holes?
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Graduate Are Proto-Photons the Only Matter at the Outer Limits of the Universe?
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Graduate Initial state based on current state?
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Stargazing Best compromise for portable telescope?
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Graduate Is There a Universe Beyond Our Own?
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Graduate What Causes the Big Crunch and How Does it Affect the Universe's Expansion?
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Graduate Force on a Swinging Rod (space elevator)
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Graduate Could the inflation epoch carry information faster than c
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Undergrad How to test a parabolic mirror?
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Graduate Can Hawking Radiation explain the immortality of neutron stars?
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Graduate Faster than light and way smaller than electrons
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Graduate Please explain the paths that planets take in regards to spacetime.
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Graduate Movement of Galaxies in relation to each other
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Graduate Bumping bubbles from our pre-bang past ( test of eternal infl.)
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Undergrad Is Time Travel Possible Through Black Holes?
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Graduate Is Time Really a Fourth Dimension Similar to Spatial Dimensions?
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Graduate Frame dragging around a rotating black hole.
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Undergrad A question about expansion of the universe
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Graduate How can matter change the geometry of spacetime?
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Undergrad How Did Kepler Discover the Sun's Position in Planetary Orbits?
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Graduate Is the Entropy of Black Holes Proportional to Their Size?
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Graduate Without Dark Matter and Dark Energy
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Undergrad How can we see stars past 13.5 billion light years away?
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Undergrad What exactly are Magnetars? I've heard the term used before, and all I
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Graduate Existence of super-massive black holes
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Undergrad Is There a Center of the Universe? The Mystery of Tracing Its Boundaries
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Undergrad Nobody has yet seen an extraterrestrial, but scientists have found
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Undergrad Quick question: Why is Saturns atmosphere LESS stormy than Jupiters?
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12.5 billion years ago what did
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Graduate Penrose Gurzadyan fire back: new paper today
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Graduate Trying to understand the Shape of the universe.
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Graduate Universal Expansion: Is All Matter Expanding?
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High School Galaxy Solar System: Giant Solar Systems Explained
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High School Earth's Mass: Does It Include People & Everything Else? | Simple Question
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Undergrad What factors make landing on Mars easier than on the Earth? Harder?
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Graduate Solving N-Body Simulation Problems with Gravitational Equations
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Undergrad Galaxies - spiral arms split, why?
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Undergrad Detecting Black Holes: Is It Possible?
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Undergrad Stars: Creation, destruction and impact on the universe
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Graduate Where Does Space Come From and What Theories Explore Its Origin?
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How can we define the universe as having a shape ?
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Undergrad Solving Sun-Earth-Moon Orbit Problem with Solar System Simulator
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Graduate Photon Red Shift Energy losses in expanding universe theories
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High School Questions regarding Earth life came from Mars - ? - Thanks
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High School What is 1 AU? Definition & Explanation
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Graduate Missing Milky Way Dark Matter: Surprising Constraints on the Lambda-CDM Model
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Undergrad Sun's Evolution: Tracing the Evidence from Red Dwarfs to the Present
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Graduate No evidence for circles in the CMB; contrary to claims by Penrose and Gurzadyan
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Graduate Is Space More Fundamental Than Time in Our Universe?
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Graduate Penrose: WMAP Shows Evidence of ‘Activity’ Before Big Bang
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Undergrad Is Time the Movement of Matter Through Space?
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Graduate What Determines the Order of Stars Hitting a Black Hole's Event Horizon?
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Graduate Is the Universe's Expansion Actually Slowing Down?
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High School Are Supermassive Black Holes Really at the Center of Galaxies?
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Graduate Communication signals and the speed of light
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Undergrad Dark Energy & Light: The Mystery
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Graduate Discovering the Shape of the Universe: An Elegant Inquiry
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High School Do we know what type of organism first started life on Earth?
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Graduate When can true singularity take place? Was the big bang the only chance
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Undergrad How to Calculate Gravitational Acceleration on a Planet with Core and Shell?
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Undergrad Are There Recent Findings on Earth-Sized Exoplanets and Instrument Limitations?
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Graduate Can Earth Orbit a Black Hole Indefinitely?
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Undergrad What Would Happen If We Turned Off the Sun's Gravity?
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Graduate Published data sets for distance modulus versus redshift
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