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 Inhabiting gaseus planets (such as Jupiter,
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Can the big bang be explained by a rearrangement of nothing?
  • · Replies 12 ·
Replies
12
Views
4K
Graduate Looking for simple answers gravity and time
  • · Replies 18 ·
Replies
18
Views
4K
Graduate Is expansion a result of gravity?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Which model of the Universe is most accurate according to Alan Watts?
  • · Replies 6 ·
Replies
6
Views
8K
Graduate What's a natal kick in reference to astrophysics?
  • · Replies 2 ·
Replies
2
Views
5K
Graduate Is time stopped inside a black hole?
  • · Replies 24 ·
Replies
24
Views
11K
Undergrad Why is the Milky Way a bared galaxy?
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Matter Falling to a Black Hole's Event Horizon
  • · Replies 5 ·
Replies
5
Views
4K
Graduate What will the universe be composed of
  • · Replies 5 ·
Replies
5
Views
3K
Graduate How long does it take a black hole to gain seven billion solar masses?
  • · Replies 11 ·
Replies
11
Views
5K
Undergrad What is the relevance in knowing that the universe for example is expanding?
  • · Replies 24 ·
Replies
24
Views
5K
Graduate Consequences of Chicxulub impact
  • · Replies 26 ·
Replies
26
Views
8K
Graduate A new cosmological model (re are we living in a black hole)
  • · Replies 9 ·
Replies
9
Views
3K
Graduate Timing of the big bounce in eternal inflation
  • · Replies 4 ·
Replies
4
Views
3K
Undergrad In which direction in the sky are we headed?
  • · Replies 10 ·
Replies
10
Views
9K
Graduate What is the trigonometric parallax of a binary system?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate How Large Could a Virga-Style Enclosure Be Before Collapsing?
  • · Replies 4 ·
Replies
4
Views
5K
Graduate How Do Atoms in Collapsing Stars Remain Stable Before Becoming Singularities?
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Extraterrestrial sky color based on atmospheric composition and sun color
  • · Replies 4 ·
Replies
4
Views
10K
High School Physics In Space Assignment - Year 12
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What is Accretion Induced Collapse and its Relationship with Type IA Supernovae?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Does logic hold true outside our reality (spacetime)?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad What is the Angular Extent of Trigonometric Parallax?
  • · Replies 4 ·
Replies
4
Views
12K
Undergrad Olbers Paradox and The Sherwood Forest
  • · Replies 12 ·
Replies
12
Views
11K
Graduate What Caused Inflation to Cease in the Early Universe?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Critical Density: What Is It and Where Does It Come From?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad E-Classifying Orbits: Learn How to Numerically Categorize Orbits
  • · Replies 2 ·
Replies
2
Views
2K
The Pale Blue Dot: Reflecting on Our Place in the Universe
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Value for redshift change in acceleration
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Calculating Acceleration Due to Gravity in a Galaxy
  • · Replies 1 ·
Replies
1
Views
3K
Graduate 'Normal universe' a special case?
  • · Replies 11 ·
Replies
11
Views
3K
Undergrad Planets Surviving Black Hole Formation: A Scientific Inquiry
  • · Replies 27 ·
Replies
27
Views
10K
Undergrad Retrograde Motion: How Tilting of Moon Affects Revolution
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Equation Help: Gravitationally Bound Rubble Pile Asteroid Orbit
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Where can I find theoretical isochrones?
  • · Replies 2 ·
Replies
2
Views
3K
Graduate Understanding Solar Radiation Force: Maths & Derivation
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What gave rise to cosmic inflation of the early Universe?
  • · Replies 4 ·
Replies
4
Views
3K
Graduate What Are the Common Misconceptions About the Big Bang Theory?
  • · Replies 24 ·
Replies
24
Views
7K
Need helping comming up with an Astronomy Project - Its open to anything ?
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Bad astronomy in massive star luminosity
  • · Replies 24 ·
Replies
24
Views
7K
Graduate Is Gravitomagnetism attractive does it have important long range attraction?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Is the Universe a Black Hole?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Theorize Possible Colonization on Europa
  • · Replies 9 ·
Replies
9
Views
6K
Undergrad Evidence that the Universe is Expanding?
  • · Replies 5 ·
Replies
5
Views
7K
Undergrad Find FWHM: Pixel Values, Gaussian Curve, Standard Deviation
  • · Replies 3 ·
Replies
3
Views
6K
Undergrad How many pages of astrophysics textbooks can you absorb in a day?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Wormhole Creation: Theoretical Methods and Questions
  • · Replies 16 ·
Replies
16
Views
18K
High School What is the Earth's orbital speed around the sun?
  • · Replies 10 ·
Replies
10
Views
3K
Graduate Shape, structure, and nature of the universe - questions/theories
  • · Replies 1 ·
Replies
1
Views
4K
Stargazing What did the January 4th, 2010 eclipse look like?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Why does the Moon orbit the Earth rather than the Sun?
  • · Replies 6 ·
Replies
6
Views
17K
Graduate Does vacuum energy gravitate and cause the universe to accelerate?
  • · Replies 7 ·
Replies
7
Views
3K
High School Is Betelgeuse Really Over 100,000 Times Brighter Than the Sun?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What happened to all the Anti-Matter
  • · Replies 18 ·
Replies
18
Views
4K
Graduate Is There a Connection Between Black Hole Density and Galaxy Size?
  • · Replies 4 ·
Replies
4
Views
4K
High School Did Mercury and Gemini use the same capsule?
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Proof that our solar system will leave the milky way.
  • · Replies 7 ·
Replies
7
Views
6K
Graduate Black Holes: growth affected by Higgs or Dark energy/matter
  • · Replies 3 ·
Replies
3
Views
4K
Graduate Realspace and redshift space correlation function questions
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Eternal Inflation: Check Understanding & Ask Qs
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Temporal finitism is wrong in assuming the beginning of time.
  • · Replies 28 ·
Replies
28
Views
9K
Graduate How generalizable is simulation/model research?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate What Role Do Dark Matter Filaments Play in Cosmology?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Lumpiness & Disorder: A Physics Comparison
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Why is there still mostly hydrogen in pop I and II stars?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Can Black Holes Actually Emit Radiation?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How Does Galaxy Spin Help Us Understand Dark Matter?
  • · Replies 6 ·
Replies
6
Views
3K
Undergrad When was Dark Matter Proposed After the Big Bang?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why Aren't Concrete Spacers Required In Foundations?
  • · Replies 1 ·
Replies
1
Views
5K
Graduate How Do Coiled Magnetic Fields in Black Holes Create Jets?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate Dark matter, dark energy, and the Kerr metric?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Understanding Black Hole Singularity
  • · Replies 35 ·
2
Replies
35
Views
12K
High School Balloon within a balloon question
  • · Replies 4 ·
Replies
4
Views
5K
Stargazing Any suggestions for a good set of binoculars around $30?
  • · Replies 4 ·
Replies
4
Views
3K
Winter is better for stargazing? Is it true?
  • · Replies 9 ·
Replies
9
Views
13K
Graduate Dark Matter - what's the mystery?
  • · Replies 11 ·
Replies
11
Views
4K
Undergrad Does Dark Matter Affect the Speed of Light?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Could Inflation Create a Universe from a Pre-Existing De-Sitter Vacuum State?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate This is the question which is asked in this content.
  • · Replies 1 ·
Replies
1
Views
2K
Graduate How inflation solves the horizon problem
  • · Replies 4 ·
Replies
4
Views
4K
Graduate Is redshift unreliable as a measuring tool?
  • · Replies 14 ·
Replies
14
Views
7K
Undergrad How Does Gravity Affect Light in Black Holes?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad How Did the Moon Achieve Orbit Without an Orbital Burn?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Isn't a Cosmos Made from Nothing Self-Consistent?
  • · Replies 19 ·
Replies
19
Views
4K
Graduate Finding Longitudinal Data of Star Magnitudes in Surveys
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Reference for scalar-vector-tensor decomposition of perturbations
  • · Replies 6 ·
Replies
6
Views
6K
High School Comparing Matter & Antimatter Suns
  • · Replies 17 ·
Replies
17
Views
7K
Graduate The Earliest Time of Life in Universe
  • · Replies 45 ·
2
Replies
45
Views
8K
Graduate Gravity and Sinking Objects in a Galaxy-Sized Water Planet
  • · Replies 6 ·
Replies
6
Views
3K
High School Why does the Moon rotate around the Earth?
  • · Replies 17 ·
Replies
17
Views
10K
Graduate Researching Dual Planets in the Same Gravity Well
  • · Replies 13 ·
Replies
13
Views
2K
High School GyratorIIVLFReceiver and 75 cm VLF loop antenne
  • · Replies 8 ·
Replies
8
Views
2K
Do Black Holes and Dark Matter Interact?
  • · Replies 1 ·
Replies
1
Views
3K
Graduate About time, size and light speed
  • · Replies 20 ·
Replies
20
Views
6K
Graduate A doubt from the book Galactic Dynamics from Binney and Tremaine
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Right Ascension and Declination to the Horizon
  • · Replies 4 ·
Replies
4
Views
5K
Undergrad Blue shift galaxies and the expanding universe
  • · Replies 2 ·
Replies
2
Views
6K
Undergrad Can I accurately plot the orbits of our solar system's planets using equations?
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Was Kepler the First to Measure the Distances from Earth to All Known Planets?
  • · Replies 11 ·
Replies
11
Views
4K