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 Frame of reference: grade 2n vs. grade 2n-1
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High School What Is the True Speed of Earth in Relation to the Solar System?
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Graduate Modified Newtonian Dynamics vs. Quantum Gravity
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Humans Settling on the Moon: What Do You Think?
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Undergrad Can Neutrinos Escape Black Holes?
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Graduate Does space have a velocity in spacetime?
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Graduate Finding Number of Stars that have Died
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Undergrad Why don't black holes become stars again?
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Graduate How do you project a Sersic Profile into 3D?
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Graduate Accurate measurement of z = 8.68 galaxy
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Graduate Can We Measure the Probability of Order in the Universe?
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Graduate The Lords of the Rings among centaurs
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Graduate How/Why does GR break down in Planck Epoch?
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Undergrad Size of the Universe: Imperial & Metric Measurements
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Graduate Size of Universe: Planck Time to Inflation
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Stargazing Got my First Telescope | Celestron Sky Prodigy 130 | Astrophotography
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High School Who discovered the cause of a red moon?
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High School Unraveling the Mystery of the Comet Dust Layer
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Undergrad How much does weight affect re-entry into the atmosphere?
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Graduate Could the Higgs Boson Help Identify Dark Matter?
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High School Mars panorama from Curiosity shows petrified sand dunes
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Graduate How much is popping into and out of
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Undergrad How do we determine distances of objects in space?
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Russian cosmonaut back after record 879 days in space
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Graduate Questions re electroweak de-unification during inflation
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Graduate How can I apply probability to the cosmological constant?
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Undergrad Why Does Earth Appear Mostly Blue from Space?
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Graduate Understanding Big Bang Singularity: Physics Forums Q&A
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High School A Question About Parallel Universes....
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High School Why does Pluto revolve clockwise
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Is Galileo Similar to GPS?
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Sweeping over the south pole of Mars
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Undergrad Planet at the center of mass of a binary star system
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High School Could we throw stuff into space?
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Undergrad Moon's crust as fractured as can be
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Graduate VSl theoreis and energy creation
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Undergrad Stochastic Matrices in Cosmology
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Undergrad Astronomers find galaxy cluster with bursting heart
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Graduate Underground magma ocean could explain Io's 'misplaced' volcanoes
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SETI reborn—the new search for intelligent life
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The Mysteries of Cosmic Ray Data: A Comprehensive Guide
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Graduate Does Redshift Change Over Time for a Constant Recession Speed?
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Undergrad Who first found the Heliocentric or Geocentric Distances
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Graduate Cassini confirms global ocean at Enceladus
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Graduate Neutral hydrogen gas in galaxy clusters
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Graduate Finding the One Degree Peak in a Power Spectrum
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Graduate Oxygen is not definitive evidence of life on habitable extrasolar planets
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Graduate How Do You Calculate Hydrogen Ionization Using a Metagalactic Radiation Field?
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Graduate How Can I Derive the Kepler Equation?
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Graduate Convert from Magnitude Density to Mass
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Is the Milky Way Visible with a New Wide-Angle Lens in Sydney's Night Sky?
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Graduate Astronomers discover how lowly dwarf galaxy becomes star-forming powerhouse
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Undergrad Which is more realiable: NED or SIMBAD?
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China aims to be first to land probe on moon's far side
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Graduate Celeste: A new model for cataloging the universe
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Graduate Question about first peak of CMB
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Graduate Planck Stars & FRBs: Rovelli's Hypothesis
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Graduate How do I calculate the event horizon?
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Undergrad Young gas giants fly close to their suns
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Undergrad Is Dark Matter Present in the Milky Way Galaxy?
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Undergrad The Universe accelerating and light
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Graduate What are the best parameters for λCDM?
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Undergrad Could a Tidal Lock Cause the Earth to Stop Rotating?
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Graduate Higgs cyclic model from Steinhardt, Turok, Bars
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Graduate Universe Expansion: What are the Limits?
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Graduate Time between farthest and closest distance from Jupiter
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Graduate Gravitational Lensing: Wave or Particle Nature?
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Graduate Gravitational lensing and Dark Energy
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Graduate Heory of Spacetime Curvature and Gravity
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Undergrad Where Does Earth's Counter Gravity Go in an Expanding Universe?
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Graduate Can Neutrinos Prevent Cavities?
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Solar Tornado Captured by NASA's SDO Probe
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What can we learn about the Milky Way using an 85mm lens and static tripod?
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Insights A Poor Man's CMB Primer Part 0: Orientation - Comments
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High School Is the Milky Way at the center of the expanding universe?
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Graduate The Age Distribution of Intelligent Life in the Milky Way
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High School Unveiling the Mystery of our Spiral Galaxy
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Graduate Questions About Contact in the Movie
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Graduate WMAP Q&A: Information about Powerspectrum & Inflation
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Graduate What defines the surface of the Sun?
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Undergrad Data for Earth Orbiting Satellite & Ionosphere: Research Help
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Graduate Light in the expanding space universe
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Graduate Does Zero Net Energy equal Zero Energy?
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Graduate Exact Classical Correspondence in Quantum Cosmology?
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Graduate How Has General Relativity Evolved Over 100 Years?
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Clear Space Technologies: Recycling & Repurposing Orbital Space Debris
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Graduate The Inflationary and The Big Bang Theory
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High School Presenting to middle-schoolers on black holes - suggestions?
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Graduate Age of Universe in Planck normalized units
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Undergrad A question about the flatness of galaxies
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Graduate How can we calculate universe diameter at a given time
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Undergrad Who First Conceived the Idea of the Cosmological Principle?
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Undergrad Difference between Cosmology and Astrophysics/Astronomy
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Graduate Novel idea for space travel (launch track around the moon)
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Yay, starting my Astronomy MSc this month
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Graduate How Did Fritz Zwicky Discover Dark Matter?
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Graduate Apple and Worm: Patching holes in spacetime game
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Undergrad How Can Empty Space Be Curved?
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Graduate Why do so many galaxies in a cluster have near zero velocity
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Graduate Improved MOND Model for Galaxy Cluster Kinematic Data
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