Astronomy, Astrophysics, Cosmology Forum

Undergrad Does recessional velocity from cosmic expansion contribute kinetic energy?

Undergrad Ion-powered dirigible as a space freighter concept

Graduate Bolometric Magnitude and H-R diagram

Undergrad *quantitative* fun with the cosmos (easy)

Undergrad Variation of gravity along latitude

Graduate How do I calculate the phase integral for the Bond albedo in astrophysics?

Graduate Is Relative Motion Evidence of a Static Aether in Orbital Physics?

Graduate Finite Big Bang, Infinite universe?

Undergrad What is the critical rate of expansion in kilometers per hour?

Graduate Big Bang - galaxies not mapping onto a point

Undergrad Will we go the the past if we could go faster than speed of light?

Graduate What could dark matter be made of if not atoms?

Undergrad A small finite universe and some wierd thoughts from it

Graduate Current eff. universe limited to redshift 1.73

Graduate Constants and multiverse possibilities

Graduate Can we see the earth in the past ?

Graduate Formula of anti-gravitational force

Graduate Finite Universe: Why Postulate an Infinite Universe?

Graduate Center of the Universe (thought experiment)

Graduate Can We Truly Conceptualize Quantum Particles and Four-Dimensional Space-Time?

High School Does matter and energy come into existence in the Big Bang?

Undergrad Does Hawking radiation decay faster for smaller black holes?

Undergrad Is Anything Else Expanding Like the Universe?

Undergrad Expansion Algorithm: Acceleration Over Time

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Graduate Is time a dimension or just distance traveled at limited speed?

Graduate How exactly can CMBR tell us universe age

Undergrad An asteroid is orbiting around the sun at a distance of 4.2

Undergrad Difference between hot and warm pixels?

Undergrad Astrophysics and astronomy resources for self-study

Undergrad Why do black bodies emit light at all wavelengths when heated?

Graduate What's the most distant observed star which is not a supernova or quasar?

Undergrad Question regarding movement of universe

Undergrad Question: What is our solar systems galactic position?

Graduate Expansion of space or accelerating speed?

High School Relationship between color of stars and their heat intensitiy

Undergrad Does solar wind at 400 km/s take 4 days to disturb Earth's magnetic field?

Graduate Gravitational waves and quantum physics

Graduate Is Antimatter Present in Cosmic Rays?

Undergrad What happens when two black holes approach each other?

Graduate Smolin's two predictions, circa 2006, True ?

Undergrad Would converting all mass in the universe to energy raise the average temperature?

Graduate How did scientists use WMAP to determine the flatness of the universe?

Stargazing Could a very large telescope see a star as a disk?

High School All the bodies in our solar system alligns in one line?

Undergrad The Possibility of "Pure" Planets

Graduate The Interplanetary Magnetic Field

Undergrad Should the Drake Equation Consider Moons?

Graduate Will it ever be possible to create Matter from a large source of energy ?

Graduate Why doesn't cosmic expansion affect bound systems like atoms and planets?

High School Farthest known astronomical objects discovered per year before 2000

Graduate How can we see galaxies 13 billion light-years away?

Graduate Could the Early Universe Have Collapsed into Black Holes?

Graduate Origin of the Universe - Byteland.org

Graduate Why doesn't the universe cool down during inflation?

Undergrad Finding orbital state vectors of planets at a specific time

Graduate Michio Kaku, Parallel Universes, and Galactic EZ Bake Ovens

Undergrad What caused Earth's orbital change 125,000 years ago?

Graduate Does gravitational potential energy change as space expands between stars?

Undergrad Did Mars belonged in Earth's Orbit at one time?

Graduate Big Bang Big Schmang, astronomical redshift is an artifact of distance

Graduate Is the rare Earth hypothesis correct about life's rarity?

High School What are some theories of the creation of the universe?

Graduate Calculating strength gravity over light years

Undergrad Why are there Magnetic Fields on the Sun?

Undergrad What is the force of gravity between Andromeda and the Milky Way?

Graduate Asymptote of expected rotation curve velocities

Graduate Reversing a Black Hole: Can It Be Done?

High School Graphs of galaxy rotation curves?

Graduate Big Bang supposedly set matter and energy

Graduate Extended structure of dark matter

Graduate How could matter-antimatter annihilation power spacecraft?

Graduate Evidence of Rotating Black Holes?

High School Is Astrobiology a Legitimate Scientific Field?

Graduate Can a star and black hole orbit each other stably without accretion?

Graduate Energy, blackholes and whiteholes

Graduate Electron degeneracy pressure in QM

Graduate Could panspermia have seeded life across the early solar system?

Undergrad How Does the Sun's Motion Appear from Earth's Perspective?

Graduate The First Particles After the Big Bang: What Do We Know?

Undergrad Wavelengths increasing with space?

Undergrad Can we track the Sun's galactic orbit and find sister stars?

Graduate Hydrostatic Equilibrium in General Relativity

Graduate Question on redshift/expanding universe

Graduate Determining Distances to Galaxies

Graduate Can the Big Crunch Theory Allow for Time Reversal?

Graduate Limiting value of Hubble constant

High School How To measure Moon Orbital Velocity ?

Graduate 7-year WMAP observations: cosmological parameters and constraints

Graduate When did H2O develop during the last 13.5 b y?

Undergrad What is the relation between gravity and light?

Graduate Space-time fabric distortion measuring

Undergrad Coordinate systems in the solar system?

Graduate What happened to the vacuum genesis theory of the Big Bang?

Graduate Gravitons and gravity in a asteroid-planet interaction

High School When will the Sun expand and what would happen to Earth?