Astronomy and Astrophysics Forum

Post thread
Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
Graduate Collapse calculation (surce code?)
  • · Replies 2 ·
Replies
2
Views
3K
Stargazing Shaving mirror for reflecting telescope
  • · Replies 3 ·
Replies
3
Views
6K
High School Help Calculating Parallax Error - Physics Forums
  • · Replies 1 ·
Replies
1
Views
3K
High School What Is the Fourth Dimension: Time, Space, or Something Else?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Hundreds of Rogue Black Holes in Our Galaxy - Is Earth at Risk?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Matter, Antimatter, and Micro Black holes
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Inventing Moons and their Eclilpses-help
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad How do we know how much visible matter exists?
  • · Replies 4 ·
Replies
4
Views
4K
Undergrad Orbital question(elliptical vs circular orbit)
  • · Replies 8 ·
Replies
8
Views
15K
Undergrad Evaluating the age of a universe
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Blue Shift objects; is there a list/table?
  • · Replies 5 ·
Replies
5
Views
8K
Undergrad Can Relativity Explain the Possibility of Aliens Visiting Earth?
  • · Replies 4 ·
Replies
4
Views
3K
Does MySpace Tom have a public personal email?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate What is the true nature of dark energy and its gravitational effects?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Understanding Matter and Antimatter Interactions in Black Holes
  • · Replies 8 ·
Replies
8
Views
5K
Identifying a Bright Celestial Object in FL, USA - Eraniamayomii
  • · Replies 10 ·
Replies
10
Views
3K
High School What is the cause of the rotation of the planets
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad 3 questions on Physical Cosmology
  • · Replies 10 ·
Replies
10
Views
3K
Like a diamond in the sky(with video)
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Motion of randomly generated stars
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Can Two Stars in a Static Universe Ever Collide Due to Gravitational Influence?
  • · Replies 16 ·
Replies
16
Views
6K
Undergrad Is Pi a Rational Number in Discrete Space?
  • · Replies 16 ·
Replies
16
Views
5K
Graduate Gravitational acceleration for a rotating torus
  • · Replies 5 ·
Replies
5
Views
5K
Undergrad Kepler's Laws, mysterious equation?
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Could CMB Mass Reveal Insights About Dark Matter?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Measuring astronomical distances
  • · Replies 3 ·
Replies
3
Views
3K
Graduate What is centimeter continuum emission?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad What type of camera is needed for solar corona photography?
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Is it known what dark matter is?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate White Hole Postulation: Can it Exist?
  • · Replies 1 ·
Replies
1
Views
2K
High School We in the Center: Why Are We at the Universe's Center?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Black Holes and Galaxy formation
  • · Replies 7 ·
Replies
7
Views
4K
Undergrad Find the spectra of most elements on line?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Basic Question about angle of inclination of a circle
  • · Replies 1 ·
Replies
1
Views
6K
Stargazing Light Source for Point source fibers - telescope
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Dark Matter Exists: Evidence from Colliding Clusters
  • · Replies 4 ·
Replies
4
Views
4K
High School Black Holes & Wormholes - What Happens?
  • · Replies 14 ·
Replies
14
Views
5K
Graduate Signal to the end of the universe
  • · Replies 2 ·
Replies
2
Views
2K
High School Tides are influenced by the moon
  • · Replies 2 ·
Replies
2
Views
3K
Graduate A way to see dark matter annihilation (Pamela: cosmic positrons/antiprotons)
  • · Replies 6 ·
Replies
6
Views
4K
Graduate Can sound waves reveal the history of dark energy in galaxies?
  • · Replies 12 ·
Replies
12
Views
5K
Graduate Gunn-Peterson effect and the Lyman-alpha forest
  • · Replies 3 ·
Replies
3
Views
11K
Graduate What is the newest theory on the missing mass?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad What Do Hard and Soft Spectrums Really Mean?
  • · Replies 4 ·
Replies
4
Views
16K
Undergrad Basic question about sun's mass & orbit of planets
  • · Replies 6 ·
Replies
6
Views
6K
Graduate Rotations of Earth and other Rigid Bodies
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Moon's & Sun's Diameters During Solar Eclipse
  • · Replies 14 ·
Replies
14
Views
4K
Graduate Hubble+/- 4.3%, is the constant constant ?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What Happens If You Travel Beyond the Edge of the Universe?
  • · Replies 5 ·
Replies
5
Views
7K
Undergrad Gravitation Force on the Earth's Centre
  • · Replies 2 ·
Replies
2
Views
5K
High School Why cant u go to outer space like an upwards climbing roller coaster?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Orbit in space (extrasolar planets)
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Hubble ultra deep field - beyond the big bang
  • · Replies 45 ·
2
Replies
45
Views
15K
Favorite books to read on subjects ranging from Astronomy
  • · Replies 37 ·
2
Replies
37
Views
6K
High School How does the movement of stars compare to the movement of planets
  • · Replies 12 ·
Replies
12
Views
22K
Graduate Pliers, pulsars and extreme physics
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Why Don't Galaxy Rotations Follow Kepler's Third Law?
  • · Replies 3 ·
Replies
3
Views
5K
Undergrad What Makes Our Solar System Special?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Spin angular momentum of black hole
  • · Replies 1 ·
Replies
1
Views
7K
Graduate What Defines Safe Orbital Distances for Planetary Bodies?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Light Waves at Edge of Universe Question
  • · Replies 13 ·
Replies
13
Views
6K
Graduate Slower rotation curves at centre
  • · Replies 3 ·
Replies
3
Views
3K
Graduate How is the Velocity of Ejection Related to Quasar Redshift?
  • · Replies 9 ·
Replies
9
Views
5K
Graduate What causes space time to come into existence?
  • · Replies 7 ·
Replies
7
Views
7K
Undergrad How constant are constants? - ice skating
  • · Replies 14 ·
Replies
14
Views
3K
Graduate Could Negative Mass Exist and Affect Black Holes?
  • · Replies 19 ·
Replies
19
Views
6K
Undergrad Matter in space create red shift
  • · Replies 15 ·
Replies
15
Views
4K
Stargazing Calc Eclipse Any Loc: What Softwares Do?
  • · Replies 6 ·
Replies
6
Views
5K
High School Best Telescope: Refractor vs Reflector
  • · Replies 17 ·
Replies
17
Views
6K
Graduate Can Our Universe Be in an Infinite Loop?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Determining Sun-Earth Distance: Parallax vs. Kepler's Law
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Radius of a star as a function of wavelength
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Why Does Blue Light Travel Faster Than Red in the Milky Way?
  • · Replies 1 ·
Replies
1
Views
5K
Graduate Black holes responsible for missing ET?
  • · Replies 8 ·
Replies
8
Views
3K
Stargazing Help get my telescope functional?
  • · Replies 7 ·
Replies
7
Views
3K
High School What Eye Pieces Work Best for Beginners with a Meade DS114 Telescope?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Photometry of SDSS Data: A How-To Guide
  • · Replies 4 ·
Replies
4
Views
4K
High School Could a Cosmic Explosion Propel a Space Probe Beyond Our Solar System?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Why Does the Equation for a Star's Central Pressure Become Singular at r=0?
  • · Replies 5 ·
Replies
5
Views
26K
High School Can the Hubble Telescope Detect Life on Distant Planets?
  • · Replies 2 ·
Replies
2
Views
4K
Undergrad Gravitational equilibrium between earth and sun
  • · Replies 13 ·
Replies
13
Views
9K
Stargazing Is It Safe to Watch a Sunset Eclipse?
  • · Replies 9 ·
Replies
9
Views
5K
Graduate Can Black Holes Create Baby Universes?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Can dark matter be just a cloud of protons?
  • · Replies 15 ·
Replies
15
Views
6K
High School Scientists Discover Liquid on Saturn's Moon Titan
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Accelerometer xyz anlges to ra/dec
  • · Replies 1 ·
Replies
1
Views
6K
Graduate Is the Universe's Expansion Due to Mass Loss or a Repulsive Force?
  • · Replies 4 ·
Replies
4
Views
3K
High School Scientists find the trigger of the Northern Lights
  • · Replies 2 ·
Replies
2
Views
3K
High School What Would Happen if the Sun Was Blue?
  • · Replies 15 ·
Replies
15
Views
56K
High School JPL Website Wrong: Venus & Uranus Rotate Opposite
  • · Replies 3 ·
Replies
3
Views
3K
High School What Determines Earth's Yearly Cycle?
  • · Replies 5 ·
Replies
5
Views
6K
Graduate Real Pictures from Space: Are We Seeing Authentic Light Waves?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Accelerating Universe and the Loss of Mass
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Can We Find Fossilized Remains on Mars?
  • · Replies 1 ·
Replies
1
Views
3K
High School What is the Current Position of Planets in the Solar System?
  • · Replies 4 ·
Replies
4
Views
47K
Graduate How much do we know about gravity?
  • · Replies 13 ·
Replies
13
Views
7K
Urban Stargazing in Orange County - Is it Possible?
  • · Replies 5 ·
Replies
5
Views
7K
Undergrad Traversing the milky way galaxy when?
  • · Replies 10 ·
Replies
10
Views
5K
Undergrad What is the relationship between velocity and distance in a stable orbit?
  • · Replies 8 ·
Replies
8
Views
3K
Stargazing Looked through an observatory telescope for the first time today
  • · Replies 4 ·
Replies
4
Views
5K