Astronomy, Astrophysics, Cosmology Forum

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High School Why is Pluto classified as a dwarf planet if it orbits with Charon?

Undergrad Kepler's Laws and altitude of orbit

Graduate What Are the Margins of Error in Calculating the Cosmologic Constant?

High School Relative Gravity: How Size Affects Force of Gravity

Undergrad Formation of Black Holes from Neutron Stars and White Dwarfs

Stargazing New Scientist Article - Pendulums + Solar Eclipse

Graduate Why Do We Seek a Universe Born from 'Almost Nothing'?

Graduate Unraveling the Mystery of Hyperbolic Trajectories

Undergrad How does Hubble's law relate to accelerating universe theories?

Stargazing Saturn using ETX-105 and a QuickCam 4000

Undergrad Why does the Sun produce a continuous spectrum if it's 99% hydrogen and helium?

Undergrad Can Distant Stars Fill the Universe with Photons?

Undergrad How Can I Effectively Investigate Meteor Impact Crater Formation?

High School How do we photograph the sun without it appearing as pure bright light?

High School Finding asteroid data for impact simulation project

Graduate What recent research and proposals are active in astronomy and cosmology?

Graduate Maximum radial velocity in a hyperbolic orbit

Graduate Universe be described with mass imbedded in space-time?

High School Deja vu is a ripple in space-time

Graduate Supernova and GRB connection paper

Graduate What is the role of life in the universe?

Undergrad Best way to get 'learn' Astrophysics

Graduate Scale factor in Robertson-Walker metric

Graduate Galaxy found at redshift 10 challenges early universe models

Undergrad Star Cluster Gravity: Impact on Forces

Graduate Do Black Holes Really Emit Radiation?

Graduate What caused the universe to compress before the big bang?

Stargazing What is the Soligor 8in telescope like?

Graduate Curvature of Space - Is it Still Relevant in Modern Physics?

High School Make Sense of our Solar System's Place in the Universe

Graduate Do black holes reduce the mass of objects they consume?

Graduate What Is the Universe Expanding Into?

Graduate What shall we call this class of star?

Graduate Losing mass, gravity, curved space, and more

Graduate How Does Delta_k Transform in a Uniformly Moving Frame in Fourier Space?

Graduate How Was Thermal Equilibrium Achieved After Inflation?

Undergrad Calculating spacecraft altitude after orbital maneuver from 300 km orbit

Stargazing I'm looking to buy a telescope pretty soon

High School Did the Big Bang start from nothing, and can atoms randomly appear?

High School How Would Life Change Without the Moon's Gravity?

Graduate Can Higher Order Curvature Theories of Gravity Solve the Dark Matter Puzzle?

Graduate What happens as a neutron star collapses into a black hole

Graduate What is the mathematical explanation for the shepherd moons of Saturn?

Undergrad Do black holes have finite or infinite mass?

Undergrad Is Earth Headed for a Dinosaur-Like Extinction?

High School Did the Big Bang happen all in one place?

Graduate Theoretical Extinguishing of the Sun with water

Graduate Mach space in The Fabric of the Cosmos

Undergrad Universe is expanding faster than the speed of light

High School Prove that 1 parsec = 3.26 light years?

Graduate Doppler effect distinguish whether the red/blue shift

Graduate Where Can I Find a Detailed Graph of Potential vs. Radius for All Orbits?

Graduate Are We Already on the Edge of the Universe?

Graduate Should I Change My PhD Program Due to Poor Supervision in Cosmology?

Graduate Will the asteroids eventually (re)form a 10th planet?

Graduate Reanalysis challenging the z = 10 galaxy claim by Roser Pello

Undergrad Locating pulsar CP1133 from 1972 catalogs

Graduate Could a Neutron Star Be at the Centre of the Sun?

High School Can a Planet Really Be Destroyed Like in Star Wars?

Stargazing Astrophotography with a 60mm refractor and QuickCam

Undergrad How Do Objects Move Near the Galactic Center?

Undergrad How can I start studying astrophysics without a physics degree?

Graduate How to match N-body simulation box size to physical scales

Graduate Newly revised paper on zero point energy and cosmological constant

Graduate The Physics of CMBR Anisotropies

Undergrad Explain to me the concept of space time?

High School What is dark energy and what is the evidence for it?

Graduate Super G string theory and its claims

Graduate What is the structure of black holes?

Graduate How to derive angular resolution from bolometric flux, spectral type and temperature

Undergrad Movie of stars orbiting a black hole

Graduate A rock, the earth, an ellipse and the joys of angular momentum

Graduate How does curved spacetime pull objects if space is empty?

Undergrad How do you calculate the mass of a black hole like Cygnus X-1?

Graduate Really exceeding the speed of light?

Graduate Fractional abundance of HI, HII, H- and e- in the photosphere

Graduate Large scale structure formation and nonlinearity onset

Graduate What is the original purpose of the Laplace-Runge Lenz vector?

Stargazing Lunar eclipse during Red Sox World Series game and astrology claims

High School What is Sean Carroll's Cosmology Primer?

Graduate The effect of curveture on space-time

Undergrad Grav Sling Shot: Understanding Inelastic Collisions w/o Contact Forces

Stargazing October 27, 2004 total lunar eclipse visible from multiple continents

Graduate Is a Cosmological Constant necessary to explain the Universe's expansion rate?

Graduate My second shallow question - about black hole¬

Graduate What is anti-energy and does it have applications?

High School Spacecraft traveled into space from Earth

Undergrad Who is rotating around whom in the solar system?

Stargazing Telescopes and resolving angles problem

Graduate Dirac,large numbers and cosmology

Graduate What does this new twist in astrophysics reveal?