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.
High School Everything is in motion, what is not?
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High School Can Planets Thrive in Binary Star Systems?
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Graduate What keeps Rhea stable? Simulation shows Titan-assist escape
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High School Formation of Stars: Questions on Range & Equilibrium
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Stargazing The Sun from Pluto: Visibility & Brightness
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Undergrad Friedmann Equation Analysis, expansion of the universe?
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Undergrad How is entropy defined for cosmological phenomena?
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High School Is expansion the same Throughout the Universe
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Graduate Another detection of the 3.5 KeV line
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High School Is this Saturn photo real or an artist's rendition?
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Undergrad Evolution of the Energy Density Parameters
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Undergrad Discover the Latest Cosmological Parameters for the CDM Lambda Concordance Model
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Undergrad Chaotic Inflation: Does it Involve Phase Transition?
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Undergrad Integrating the Friedmann Equations
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High School Is The Holographic Universe Theory Gaining Popularity And Why?
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Undergrad What is the Dipole Repeller and How Does it Affect Our Galaxy's Motion?
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Undergrad Is momentum conserved in the entire observable universe?
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Undergrad How can I have an image in space that I cannot reach out and feel with my hand?
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High School Could Jet Engines Be Used for Space Travel?
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Undergrad Einstein & Lambda: 1917 Static Model Review
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High School Where Can I Find a Barycentric Solar System Ephemeris?
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High School Visibility of Ceres, Uranus, and Neptune with $60 binoculars
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High School What Color Are Asteroids? Classification and Composition Explained
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Undergrad Level of unseen elastic scatterings
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Stargazing Formulas for camera obscura (correct sub forum?)
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Undergrad Is proton decay considered in neutron star models (and LHC)?
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High School On the post-main-sequence evolution
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High School Is the universe expanding faster than expected
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High School Types of Supernovae: Explanations & Differences
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Graduate Energy scale of Hubble constant for dark energy scalar field
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High School Calculating Distance: What Am I Doing Wrong?
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Undergrad Electroweak symmetry breaking and quantum tunneling.
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High School Does the 2LOT rule out an eternal universe?
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High School Mass and free fall speed under gravity
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Graduate Lyman-alpha forest: why not Lyman-beta?
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Graduate Understanding the Relationship Between Inflation and Quantum Fluctuations
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High School Transit of newly discovered exoplanet of Proxima centuri
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Undergrad What would it take to hear the Sun's sound from Earth?
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Undergrad Inflation and Gaussian CBR pertubations
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High School What is the heaviest element that a star will fuse?
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High School What would happen if the Moon wasn't there?
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Graduate Q: Black hole event horizon vs distortion effects
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High School How does Ram pressure kill galaxies
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Graduate Is linear polarization not expected from an astrophysical maser
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Undergrad Different forms of energy density in inflation
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Undergrad Rescaling the equation of motion of inflation
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High School Redshift of distant galaxies....
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High School Speed of light within a black hole
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Graduate Throwing gravity and dark energy in the same basket
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High School Venus -- a more attractive target than Mars for human colonization?
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High School Are There Constellations with Stars Close to Each Other?
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Undergrad Particle distribution as a function of radius in astrophysics
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Undergrad Are Finite Universe Models Plausible Despite Flat Curvature?
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Stargazing What sort of camera would you use?
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Undergrad Constraints on Dark Matter in the Solar System
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Undergrad Can Spacetime be a Reference Frame?
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Undergrad Why is the DM density near the sun so small?
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Undergrad How Does the Lyman Break Drop-Out Technique Identify High Redshift Galaxies?
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Undergrad How to know what proposal to write for observation?
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High School Is the Universe Inside a Black Hole?
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High School Is the Big Bang Just an Event in an Existing Space/Time Fabric?
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Undergrad Growing food in space - a 3rd concept
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Undergrad Estimate the number of CMB photons in 0.25-litre
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High School Relating Gravitational Field Strength and Mass
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High School How would I calculate how much light is being bent in a certain area?
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High School Top 3 candidates in our solar system to host microbial life from Earth
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Undergrad Which is better to colonize: Mars, the Moon, or Deimos?
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High School Why do black holes have infinite density, mass, and gravity?
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Undergrad How Can Gravitational Lensing Help Detect Dark Energy?
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Graduate Human Implications of Space Travel: A Psychological Exploration
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Graduate Chandrasekhar Mass - White Dwarf
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High School Keeping Time on Mars: A New Calendar System?
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High School Hot Jupiters & Kepler's Laws: Does it Violate?
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Undergrad Where did the Dark Energy (or similar mechanism) come from?
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Undergrad Question about "the big bang happened everywhere at once"
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High School Evolving Dark Energy: A Missed Revolution?
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High School Is Our Brain Limiting Our Understanding of the Universe?
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Undergrad Qs re dark matter when all baryonic matter is in black holes
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Undergrad A multiple-impact origin for the Moon
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Graduate Can white dwarfs have iron cores?
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Undergrad Structure of Earth, pressure and density model
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Undergrad Unraveling the Mystery of Dark Matter: The Missing 96% of the Universe
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Undergrad What Is the True Nature of Dark Matter?
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Undergrad Is the Strange Star's Composition Similar to a Bose-Einstein Condensate?
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Undergrad How Can I Graph Hubble Term vs. Inflaton Using Mathematica?
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High School Dark matter can be cold warm or hot
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Undergrad Qs: What is known and known to be unknown about DM
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Earth vs. Space Research: Which One Holds More Importance for Humanity?
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High School New star in the skies -- Plausible?
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High School Problems With a Terraformed Moon -- Maybe?
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Graduate Starobinsky Inflation and Supergravity
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Undergrad Can Black Holes Explain the Mystery of Dark Matter in the Universe?
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Undergrad Gravitic Field of Rotating Disk-Shaped Mass Along Ecliptic
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Stargazing How Can a Grain of Sand Create a Bright Meteor?
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Undergrad Effort to get us all on the same page (balloon analogy)
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High School Is dark matter self-interacting?
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High School Significance of a planet's "surface gravity"
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High School Move vehicle in space by rail structure systema
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High School Confused about traveling at the speed of light
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High School Is the Earth in its original orbit?
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