Astronomy, Astrophysics, Cosmology Forum

Undergrad How do the s-process and r-process create elements in stars?

Undergrad Why Does Our Galaxy's Center Look Bright Despite a Black Hole?

Undergrad Prof. Kaku's approach on why we haven't met intelligent E.T. life.

Undergrad Calculate distance between stars in a globular cluster?

Graduate Is the Universe Really Expanding from a Single Point?

Undergrad Could Apophis Change Earth's Future in 2036?

Graduate Candidates for baryonic dark matter

Graduate Are Gravitational Effects Infinite in Black Holes and Wormholes?

Undergrad What is the synodic period of Mercury?

Stargazing Do telescopes let us see distant supernovae earlier than with naked eyes?

Graduate Age of universe and time dilation.

Graduate Why don't gravitons clump together if gravity is made of them?

Undergrad Is a Space Station More Cost-Effective than a Moon Base?

Graduate Dark Matter/Dark Energy Question

Graduate How Can I Mimic the Best Fit for HD17156b's Radial Velocity Data?

Graduate Simulating the Primeval Plasma to Create a Universe

Undergrad How is dark matter different from the old ether theory?

Undergrad Redshift at the epoch of matter-radiation equality

Graduate Maximum distance we can observe as the universe expands

• Poll

Undergrad Is 34% far or slightly smaller than 100%?

Graduate Emitted radiation and absorbed solar radiation

Graduate What caused the physical laws we have?

Graduate Evidence for Dark Matter Beyond Rotation and Clusters

Graduate Is the universe infinite in space and time?

Undergrad How is the energy transfered back to the Moon

High School Titan - the next closest thing to Earth.

Undergrad How old was the universe when galaxies started forming?

Graduate Were time and space created with the physical universe?

Graduate Could Solar Wind Be the Source of Dark Matter?

Graduate Has Electromagnetism Shaped Cosmic Structures?

High School Viewing Saturn's rings and Jupiter's great red spot with 100mm Cassegrain

Graduate Why doesn't iron give off any energy when it is created through nuclear fusion?

Graduate Does time slow down when falling into a black hole?

Graduate Space where General Reletivity Resides

Graduate What is the heaviest element that a supernova can produce?

Graduate What Theory Proposes an Infinite 4D Universe Beyond the Big Bang?

Undergrad Why aren't planets in our solar system spreading apart as the universe expands?

Undergrad Stellar orbits around the milky way.

Undergrad Transit Method to find extrasolar planets.

High School Redshift vs blueshift definitions

High School Saturn's Rings: Why Are They Split?

High School What Does Empty Space Really Mean?

Graduate Can the universe be infinite in LQG theory?

Undergrad Finite vs Infinite: Does Size Matter in the Universe?

Undergrad Is a Symmetrical 'X' Planetary Alignment Possible in a Solar System?

High School Black hole properties: mass, energy, Hawking radiation and magnetic fields

High School Brightness of ISS in Earth's shadow

Undergrad Neutron stars and magnetic fields

High School This first thing that Kills a human in Space?

Graduate De Broglie equation and black holes

Graduate Is there a beginning to chaotic inflation?

Stargazing Viewing Saturn from a 6 telescope

Graduate Linearly-expanding FRW model matches DL-z observations

Graduate Can Energy of Creation Connect Us to Our Origins?

Stargazing Where should the secondary mirror be placed in a concave mirror telescope?

High School What in general relativity predicts an expanding universe?

Stargazing Why does Saturn move so much in my telescope?

Graduate Is It Possible to Have Infinite Mass?

Graduate Law of entropy vs. Big Bang Theory?

Graduate What Is the Empty Space into Which the Universe Expands?

High School Planetary Alignment (nothing to do with astrology)

Undergrad Big Bang From A Collision Of Protons?

Undergrad What is the percentage of heavy element of the sun?

Graduate Do we see distant galaxies as they were when they emitted their light?

Graduate Understanding Energy Density and Cosmic Expansion

Graduate Can dark matter explain the flyby anomalies?

High School Measurement of distance in space

Graduate Did Time, Mass, and Energy Exist Before the Big Bang?

Undergrad A few key questions about the Big bang model of the universe

Undergrad Rail guns for launching projectiles to space

Graduate Measuring Star Diameter in Foreign Galaxies

Graduate Why is matter density uneven if the Big Bang was uniform?

Graduate If the universe came from nothing

Graduate Earth's interior heat vs Gravity

Graduate Does Asymmetry in Spacecraft Flyby Trajectories Cause Unexpected Energy Gains?

Graduate Stable Blackhole: Radius Dependence

High School What Causes the Colorful Cross in Photos of Sirius?

Graduate Is the edge of the universe the begging of time

Graduate Can two planets orbit on opposite sides of a star?

Undergrad How Can You Capture Star Spectra for Astronomical Analysis?

Undergrad Is Space Infinite? - What Do You Think?

Graduate Is the universe's expansion rate constant, accelerating, or decelerating?

Graduate We know that there are opposites all around us with energy, you have

High School Bright star low in the west sky after sunset: Venus or another planet?

Graduate Could the Big Bang Have Been A Cyclical Event?

Graduate Can our Nuclear weapons destroy a Neutron Star?

Undergrad How was Voyager 2 used to determine the orbits of Uranus and Neptune?

Stargazing 8 inch dobsonian focusing issue with 30mm eyepiece

Graduate String/ M theory and Dark Matter

Graduate Where did all the matter in the universe come from?

Graduate Can Dark Energy Be the Sole Source of Gravity?

Graduate What happens if a cosmic ray proton with 10^20 eV hits the brain?