Astronomy, Astrophysics, Cosmology Forum

Graduate Gravitational Energy: Why Negative?

Undergrad What happens when a pulsar dies?

Graduate Varying Expansion Rates for Solar System

Graduate Testing cosmology, without assuming GR?

Graduate Do the colors in the Ring Nebula come from synchrotron radiation and blueshift?

Undergrad Do solar cycles cause Earth's magnetic reversals?

High School Did Comet Machholz Lack a Visible Tail?

Graduate N-body simulation test with sun, earth and moon

Undergrad Why did the Big Bang happen in the first place?

High School Cause of Gravity: How Does It Work?

Graduate Why do we assume infinite space in cosmological models?

Graduate Why do patterns exist in the universe?

Undergrad Huygens probe findings on Titan's atmosphere

Stargazing Is it Possible for All Planets to Line Up?

Graduate Does IMAP's polarization data affect dark matter calculations?

Undergrad Why Does Venus Rotate Differently?

Undergrad Matter or Energy: Which Came First?

Graduate Can we be tricked into thinking W=-1

Undergrad What is the concept of concentrated mass?

High School Do Planets Generate Their Own Light?

Graduate Idea find black holes using grav. lensing

Graduate Amit Goswami's The Self Aware Universe

Graduate Gas Giant Ring Collapse Theory for Rocky Planet Formation

Graduate Does Earth's motion through space affect molecular measurements and vacuum experiments?

Undergrad Astronomers observe some galaxy

Undergrad 10^6 X stronger than Earth¹s lightning: Some of Cassini's findings discussed

Graduate What is the motion of a singularity

High School What is zeeman and stark effects?

Graduate Can Black Holes Compute Universes?

Graduate Why is cosmic background radiation evidence for the Big Bang?

Graduate Advanced Civilizations Could Make SETI Signal Detection Impossible

Graduate Little Black Holes: Dark Matter And Ball Lightning

Graduate Is our galaxy in the centre of the universe?

Stargazing Giant Magellan Telescope GMT Announcement

Graduate Mass of Jupiter using as Many moons as Possible

Undergrad Why are H- ions always less abundant than H II ions in a gas?

Graduate Dark Matter Detection: Controversy Grows

Graduate Could Binary Planetary Systems Exist with Earth-Sized Bodies?

Graduate Is New Galaxy Formation Possible at the Edge of the Expanding Universe?

Graduate Virtual Pairs and the Fate of the Universe

Graduate Does Dark Matter's Interaction with Gravity Prevent it from Forming Black Holes?

Graduate What Are the Codes for Stellar Astrophysics?

Graduate Why was WMAP 2-year data delayed?

High School Why does the earth rotate around its

Graduate How are the galactic jets made in black holes?

High School Why doesn't the Sun have a stronger effect on tides?

Graduate Does the gravity constant change?

Graduate Could hot dark matter be cold dark matter?

Graduate Galaxy rotation curves without dark matter using modified gravitational theory

Graduate Why Are White Dwarfs Hot Despite Their High Density?

Undergrad What is the relationship between luminosity and magnitude in stars?

Stargazing Which is a better gift: a 60mm refractor or 10x50 binoculars?

Graduate ZPE energy levels and cosmology.

Graduate Most energetic galaxy cluster merger imaged by X-ray observatory

Undergrad Include Sun's Diameter in Star Distance Measurement?

Graduate Can White Holes and Hawking Radiation Explain the Big Bang?

Undergrad Could Mars Bring Deadly Bugs to Earth?

Graduate Does Phase Space Explain Entropy?

High School Why does NASA search for water on Mars if alien life might not need it?

Graduate Space Expansion from Dark Matter

Graduate A question in Kepler's second and third laws.

Undergrad Are Black Holes Truly Infinite in Mass and Energy?

Undergrad Why Do Stars Turn Red Giants as They Age?

Graduate Doppler Effect and Harmful Radiation

Graduate What cosmic events produce detectable gravitational waves?

Graduate What makes some gamma-ray bursts brighter than others?

Stargazing Solar eclipses, total and annular

Graduate How Can Gravity Escape a Black Hole While Light Cannot?

High School Why does a bight object like the sun have negative magnitude?

Undergrad Does nuclear fusion or fission power a star's core?

Undergrad Sending space probes to other planets

Graduate How Many Orbits Does a Solar Sail Need to Reach the Moon?

Undergrad Why can you see white through H-alpha filter?

Graduate What are the 42 proposed mechanisms for baryogenesis according to this paper?

Graduate What Type of Finite or Infinite Universe?

High School Could aliens 22,000 lightyears away decode the 1974 Arecibo message to M13?

Graduate What does a smaller cosmic quadrupole amplitude mean for CMBR photons?

Undergrad What Would Happen If the Moon Entered Earth's Atmosphere?

Graduate Relation between quantum field theory, relativity and the cosmological constant

Graduate Will the Universe Have a New Beginning?

Undergrad Inverse Square Law - Is It Valid for Quasars?

High School How do nebulas form stars and solar systems?

• Poll

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