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 Earth and moon barycenter question.
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Graduate What is the key equation for distance growth in Kindercosmos?
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Graduate Gravitational Effect of Electromagnetic Radiation
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High School T: What Stars Are We Seeing Between Galaxies?
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Graduate Is the "Big Bang Theory" is on it's last breath?
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Graduate Globular cluster ejected from M87
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Graduate Distribution of energy after matter/antimatter annihilation
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Undergrad Can Magnets Bend Space-Time and Enable Time Travel?
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Graduate Shape of Universe - What would a very long stick do
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Graduate Calibration cosmic distance scale on age globular clusters
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Graduate Gravitational Waves and the Expansion of the Universe: Redshift or Not?
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Graduate Orion Nebula's Origin Uncovered?
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Graduate Tracking down Phil Trans xxxv 637
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Graduate Density Perturbations: Relation to c/H & Scale Invariance
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Undergrad Are Martian rock formations similar to those on Earth?
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Undergrad What is the mass of Jupiter's white oval storms compared to Earth?
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Build a Barn Door Tracker: Tips & Advice
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High School C: "The Big Bang Machine" on Nova: A Critique
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Graduate Quantum equations suggest the big bang never happened
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Graduate Predicting orbits and masses of as-yet-unknown bodies
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Undergrad Terminology in structure generating
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Graduate Kepler's 3rd Law: Constant Orbital Velocity Around Black Holes?
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Graduate Variance and 2 point function in perturbation theory
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Undergrad Is Cosmology a Branch of Physics or Astronomy?
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Graduate What are the important numbers in Cosmology?
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Graduate Does Gravitational Lensing Cause Red Shift in Light?
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Undergrad Virtual Solar System (formula for gravity in 3d)
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Undergrad Seasons due to Earth's elliptical orbit
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Undergrad Dark Matter Black Holes: Is it Possible?
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Graduate Is Universal Expansion Perceptible to Observers?
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Undergrad Question about solar energy: angle of incidence
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Graduate 3 fates of universe holds for which cosmological fluids?
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Undergrad Precession of Earth's axis and alignment with stars
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Graduate Why Is the Accelerated Friedmann Equation Giving Incorrect Signs?
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Graduate Quantity of matter in the universe?
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High School ET Lives in a Multi-Planet Solar System
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Graduate Possibility of multiple moons in Earth-Moon system
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Graduate Interstellar gas cloud stability
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Graduate Why did dark energy overcome dark matter to create the expanding Universe?
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Graduate Would the Big Rip make time stop?
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High School Imagine you were spinning in space
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Graduate Minimum Orbital Radius Around Black Holes
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Graduate How Did Early Black-Hole Dynamics Shape Galaxy Formation?
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High School Does the amount of matter in the universe stay at a constant amount?
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Graduate If there is a big crunch will space collapse with the matter?
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Graduate Analyzing Planck Data for No-Scale Supergravity Inflation
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Undergrad How Do Supernovae Contribute to the Birth of New Stars?
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Graduate Calculating time until apoapsis analytically
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Graduate Using atomic clocks for gravitational wave detection
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Graduate Can Galaxy Lensing Confirm Dark Matter's Presence?
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Graduate Neutron Star Collapse: Upper Limit & Physics Explained
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Graduate Scholz's star passed through the Oort cloud
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Graduate In what way is "dark energy" more than "none of the above"?
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Graduate Simulating dark matter by assuming stable solution
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Undergrad Unpacking the Big Bang: Understanding the Rapid Expansion of Space
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Unexpectly captured comet Comet C/2014 Q2 Lovejoy
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Undergrad Relationship between characteristic energy and delta-v
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Graduate Why do people think the universe is finite?
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Graduate Planckoscope- Visualizing Planck Data
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High School Baffled by observation -- 3 lights in the night sky
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Graduate Universe Expansion: Why Objects Move Away Faster The Farther We Look
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Stargazing Research with Ritchey–Chrétien 400 mm telescope
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Graduate Dark Energy: Does Mass Loss Explain Acceleration?
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Graduate What Is the Connection Between Black Hole Entropy and the Holographic Principle?
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Graduate Questions Concerning The Planck Epoch
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Graduate Type Ia Supernova not Standard Candles? I'm confused .
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Graduate Expansion, Gravity and the Electric Force
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USB Eyepiece for Microscopes: Quality Viewing from Any Position
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Graduate Constraints on Inflation (Planck 2015 results XX)
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Graduate Is Phi Squared Inflation Compatible with Latest Planck Data?
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Graduate Has the Number of Galactic Revolutions Influenced Spiral Galaxy Formation?
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R.I.P. Dr. Val Fitch, 91. Nobel lauriate cosmologist
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High School Extra Solar Planets: Data & Answers
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Graduate How are Solar Flares and Solar Winds Generated by the Sun's Magnetic Field?
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Graduate Why did Dark Matter have less of an Impact on the Universe
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Undergrad Need data for galactic rotation curves
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Graduate Klein Gordon Equation in Quintessence Models
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Graduate Calculating the Temperature in Space
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High School Is there anything like a cosmic mirror?
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Undergrad Speed of Galaxies: Defying Physics?
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Stargazing Help with telescope/observatory data and images
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Undergrad Astronomy: Measuring Radio Wave Distance from Universe
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Undergrad "Amount" red light in red shifted light
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Graduate Does Hawking's Zero Energy Theory Resolve the Universe's Origin?
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Undergrad If the energy or matter can't be created nor destroyed,does
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Graduate Wrong Explanations for the Luminosity of Main-Sequence Stars
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Graduate Boundary for an Infinite "Open" Space
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Graduate Hawking Says, There are no black holes.
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Undergrad Is Space Really Empty and What Does That Mean for Propulsion?
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Graduate Is the Diffuse Microwave Energy from Galaxies Contributing to CMB Measurements?
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Graduate Can Quantum Mechanics Explain the Expansion and Contraction of Space-Time?
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Undergrad Calculate time (or fraction of orb. period) of sat. in umbra
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What topics are covered in the University of Arizona's Cosmology Video Lectures?
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Graduate Multiverse and Eternal Inflation Disproved?
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Graduate Entanglement as the fabric of space-time?
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Asteroid 2004 BL86 and its small moon
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High School Why do natural Moons revolve around planets?
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What is the A Grand Tour of the Universe video series about?
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Graduate How to measure curvature of 3-sphere from inside its surface
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Graduate The initial mass function (IMF) of main-sequence stars,
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