Astronomy, Astrophysics, Cosmology Forum

Post thread
Join in expert discussion on the topics of Astronomy, astrophysics and cosmology. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
Graduate 10 ^18 Amps, Universal Record for Current
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Black Hole White Hole in $\Lambda$CDM Cosmology
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Extremely Advanced Materials from Manipulation of Space-time
  • · Replies 18 ·
Replies
18
Views
5K
Graduate Presuppositions of Standard Model?
  • · Replies 4 ·
Replies
4
Views
2K
Stargazing What telescope aperture is needed for spectroscopy of star clusters within MC?
  • · Replies 10 ·
Replies
10
Views
5K
Graduate Could a Pre-Big Bang Civilization Have Existed?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad Question about the Moons formation.
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Does the CMBR have a detectable absorption spectrum?
  • · Replies 8 ·
Replies
8
Views
4K
Graduate Is General Relativity Wrong on Large Scales?
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad Can we explore white dwarfs with robotic missions?
  • · Replies 12 ·
Replies
12
Views
9K
Undergrad What is the case against the theory of cosmic evolution?
  • · Replies 25 ·
Replies
25
Views
7K
Graduate Question about the expansion of the universe/inflation
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Could the Shape of the Universe be Explained by Black Holes and Supernovas?
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Black holes in the early universe
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Star gets torn apart by massive black hole
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Big Bang Mystery: Where Did the Explosion Take Place?
  • · Replies 15 ·
Replies
15
Views
4K
Graduate What is retrograde planetary perihelion precession?
  • · Replies 2 ·
Replies
2
Views
4K
High School How Do You Locate Saturn and Jupiter with a Medium Powered Telescope?
  • · Replies 3 ·
Replies
3
Views
4K
Astronomy & 2012: What Does It Mean?
  • · Replies 8 ·
Replies
8
Views
14K
Graduate Inflation, Mach's Principle & the Early Universe
  • · Replies 7 ·
Replies
7
Views
3K
Graduate What Role Did Electrons and Positrons Play in the Early Universe?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Heat Death vs. Bounce: Which Is the True Fate of the Universe?
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad Big Bang Expansion: Faster than Light?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate How does the Earth-Moon system gain energy despite tidal interactions?
  • · Replies 8 ·
Replies
8
Views
6K
Stargazing Solar Eclipse - Are we just lucky?
  • · Replies 11 ·
Replies
11
Views
4K
High School Theory of the Universe - 14-Year-Old's Perspective
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Black Hole - Questions (discussion)
  • · Replies 7 ·
Replies
7
Views
5K
Graduate Speed of light: making non-Newtonian physics tangible
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Accelerating Universe Expansion’s Implications? (layman’s questions)
  • · Replies 6 ·
Replies
6
Views
5K
Graduate Is the Heat Death of the Universe Inevitable and What Can We Do About It?
  • · Replies 35 ·
2
Replies
35
Views
12K
Graduate Plot of energy against space-time
  • · Replies 4 ·
Replies
4
Views
4K
High School How would I measure the angle of a certain street from true north?
  • · Replies 9 ·
Replies
9
Views
30K
Graduate What is there actually to say of wormholes at the moment?
  • · Replies 11 ·
Replies
11
Views
5K
Model of the universe/s, multiverse's etc (just a thought nothing more )
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Star Swallowed by Galactic Black Hole
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Will the Expanding Universe Eventually Become Invisible?
  • · Replies 3 ·
Replies
3
Views
3K
High School View Saturn Through a Telescope: A Noob's Guide
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Unraveling the Mystery of STEP Mission: What Happened and What's Next?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Positions on possible parallel universe theory
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Evolution of Elementary particles?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Does the speed of light change if?
  • · Replies 17 ·
Replies
17
Views
7K
Graduate Would a Neutron Star Stop a Neutrino?
  • · Replies 20 ·
Replies
20
Views
8K
Graduate Why are Andromeda and the Milky Way approaching each other?
  • · Replies 16 ·
Replies
16
Views
7K
Undergrad How are Cepheids used to measure distances?
  • · Replies 5 ·
Replies
5
Views
5K
Undergrad Can we identify the generation of any star?
  • · Replies 1 ·
Replies
1
Views
3K
High School View Saturn w/ 1100x120 Reflector: Eye Piece Guide
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Is the Sun Going Through a Period of Weakening?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad How Do We Calculate the Gravity of Different Particles and Celestial Bodies?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Neutron Star to Black Hole Via OMG?
  • · Replies 8 ·
Replies
8
Views
5K
Undergrad Stefans Boltzmann Law: Find Star Luminosity
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Young star generations: where do they get their Hydrogen?
  • · Replies 10 ·
Replies
10
Views
6K
Graduate Rate and direction of expansion of the universe
  • · Replies 6 ·
Replies
6
Views
4K
Exciting Physics Projects: Get Help Choosing Your Next Project!
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Temperature - Effect on atmospheric pressure.
  • · Replies 13 ·
Replies
13
Views
12K
Graduate What is the evidence on Big Bang versus steady state cosmologies?
  • · Replies 1 ·
Replies
1
Views
9K
Graduate What is CMB Rest? - Explained by Forum Experts
  • · Replies 1 ·
Replies
1
Views
7K
Graduate Black Hole Mass Flows: Is the Balance 0%?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad What is the significance of hour angle in astronomical observations?
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Gravitational perturbations = tidal forces?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Is the universe entirely predictable, or is it based in probability?
  • · Replies 10 ·
Replies
10
Views
10K
Undergrad Are Black Holes Hot? A Deeper Look
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Did Gravity Exist Before the Big Bang?
  • · Replies 8 ·
Replies
8
Views
3K
Undergrad Planet orbital location database
  • · Replies 5 ·
Replies
5
Views
5K
Graduate Is the Universe Based on a Simple Binary Code?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Can Black Holes be Propelled by Ion Engines?
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad What happens when a second mars appears?
  • · Replies 4 ·
Replies
4
Views
4K
High School Spectacular solar eruption 7 june 2011
  • · Replies 8 ·
Replies
8
Views
5K
Graduate Age of Universe: Defining Time from Big Bang
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Possible non-existence of black holes and its consequences
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Fate of Universe: Intelligent Species Impact
  • · Replies 2 ·
Replies
2
Views
2K
Graduate What is the efficiency of the Sun, really?
  • · Replies 7 ·
Replies
7
Views
10K
Graduate Big Bang With No Center Fallacy?
  • · Replies 5 ·
Replies
5
Views
6K
High School Black Holes and their original star
  • · Replies 4 ·
Replies
4
Views
2K
Graduate New Supernova Discovery Shines Bright
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Cosmological principle and quasar distribution
  • · Replies 36 ·
2
Replies
36
Views
9K
Searching for list of measurements of moon-earth distance.
  • · Replies 20 ·
Replies
20
Views
8K
Graduate Does the Holographic Principle Suggest a Schwartzchild Radius for the Universe?
  • · Replies 2 ·
Replies
2
Views
3K
Opinions about April SciAm article about inflation inflation by Steinhardt?
  • · Replies 10 ·
Replies
10
Views
6K
Graduate DARK MATTER: it was always there
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Big surprise - Magnetic foam at edge of heliosheath.
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Varying Fine Structure Constant - Any recent results?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Interaction between dark matter and normal matter
  • · Replies 24 ·
Replies
24
Views
8K
High School Does the temperature stay the same above a certain point?
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Where the rules change, is it sudden?
  • · Replies 20 ·
Replies
20
Views
5K
Undergrad Are there any theories that explain where matter and energy came from?
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Black hole growth paradox question
  • · Replies 21 ·
Replies
21
Views
5K
Stargazing Skywatcher Skyliner 150P Dobsonian questions
  • · Replies 11 ·
Replies
11
Views
2K
Graduate How Does the Solar Wind's Protective Role Affect Astronomical Observations?
  • · Replies 2 ·
Replies
2
Views
4K
Graduate Can a blackhole suck in another blackhole?
  • · Replies 50 ·
2
Replies
50
Views
30K
Graduate The bounce and many universe theories
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Are There Other Universes Beyond Our Own?
  • · Replies 26 ·
Replies
26
Views
6K
Undergrad Could the acceleration of expansion (of the universe) be an optical illusion?
  • · Replies 7 ·
Replies
7
Views
5K
Undergrad Planets - Effective Temperature vs Actual Temperature
  • · Replies 2 ·
Replies
2
Views
6K
High School Is it possible to truly escape Earth's gravitational pull?
  • · Replies 1 ·
Replies
1
Views
4K
Undergrad Can There Be a Stable Figure-Eight Orbit Between Earth and the Moon?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Quasars with high redshift in nearby galaxies
  • · Replies 26 ·
Replies
26
Views
7K
Graduate Brian Greene: Hidden Reality Book
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Can We Identify the Center of Our Expanding Universe?
  • · Replies 13 ·
Replies
13
Views
4K
Undergrad Asteroids and the formation of planets
  • · Replies 3 ·
Replies
3
Views
5K
Real Quasar Image: Gamma Radiation Burst on Science Channel Program
  • · Replies 6 ·
Replies
6
Views
4K