Cosmology Forum

Post thread
Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.
High School Gas planets with solid satellites
  • · Replies 2 ·
Replies
2
Views
1K
High School Expansion of Space Itself, rather than due to an Explosion like the Big Bang?
  • · Replies 9 ·
Replies
9
Views
3K
High School What is the recession speed today of the matter which created the CMBR?
  • · Replies 57 ·
2
Replies
57
Views
6K
High School Bound Systems in an Expanding Universe: How Can Galaxies Merge?
  • · Replies 9 ·
Replies
9
Views
3K
High School Understanding the Expansion of Space: Galaxies Moving Away and Proving Expansion
  • · Replies 78 ·
3
Replies
78
Views
9K
High School Could the source of dark energy be our parent black hole feeding?
  • · Replies 6 ·
Replies
6
Views
2K
High School Could a Galaxy Older than 13.8 Billion Years Redefine Cosmology?
  • · Replies 4 ·
Replies
4
Views
2K
High School What Is the Information That Cannot Escape a Black Hole?
  • · Replies 3 ·
Replies
3
Views
3K
High School Temporal differences across a galaxy?
  • · Replies 6 ·
Replies
6
Views
2K
High School Big Bang Question -- How was the first matter formed?
  • · Replies 69 ·
3
Replies
69
Views
6K
High School How much energy does our Universe have?
  • · Replies 12 ·
Replies
12
Views
2K
High School Explaining Cosmic Inflation using analogies
  • · Replies 3 ·
Replies
3
Views
2K
High School Is Entropy the Key to Understanding the Big Bang and the Fate of the Universe?
  • · Replies 27 ·
Replies
27
Views
6K
High School How good are our ears? (Detectable Interstellar signals)
  • · Replies 7 ·
Replies
7
Views
2K
High School What is the oldest of each class of star?
  • · Replies 2 ·
Replies
2
Views
2K
High School Experimental evidence on cosmological redshift
  • · Replies 34 ·
2
Replies
34
Views
4K
High School What Function Does Dark Matter or Energy Serve?
  • · Replies 13 ·
Replies
13
Views
2K
High School For object 3.26 million light-years away, light redshifted by 70 km/s
  • · Replies 12 ·
Replies
12
Views
2K
High School How could something that is infinite (the Universe) expand?
  • · Replies 30 ·
2
Replies
30
Views
3K
High School What does the Universe exapand into?
  • · Replies 27 ·
Replies
27
Views
2K
High School Basic confusion about the Big Bang and light cones
  • · Replies 11 ·
Replies
11
Views
2K
High School Question regarding light from distant objects
  • · Replies 8 ·
Replies
8
Views
2K
High School Does dark energy's effect or strength vary over time?
  • · Replies 24 ·
Replies
24
Views
3K
High School What are the potential causes of the universe's eventual demise?
  • · Replies 1 ·
Replies
1
Views
1K
High School Big Bang: Size of the Universe at Different Epochs
  • · Replies 58 ·
2
Replies
58
Views
7K
High School Does dark energy or cosmic inflation explain flatness?
  • · Replies 37 ·
2
Replies
37
Views
6K
High School How do the candidates for Dark Energy 'work'?
  • · Replies 4 ·
Replies
4
Views
2K
High School Does the CMB itself tell us that it started at 3000K?
  • · Replies 23 ·
Replies
23
Views
2K
High School What Space Does the Universe Occupy?
  • · Replies 4 ·
Replies
4
Views
2K
High School Why doesn't cosmic inflation violate conservation of energy?
  • · Replies 3 ·
Replies
3
Views
3K
High School Accelerating expansion of the Universe
  • · Replies 6 ·
Replies
6
Views
2K
High School Earth's orbit and the expansion of the Universe
  • · Replies 27 ·
Replies
27
Views
2K
High School What is the relationship between expansion and curvature?
  • · Replies 20 ·
Replies
20
Views
4K
High School Is the Universe's Matter/Antimatter Asymmetry a Key to Understanding Its Origin?
  • · Replies 27 ·
Replies
27
Views
3K
High School What is the relationship between inflation and the expansion of our universe?
  • · Replies 1 ·
Replies
1
Views
2K
High School Is There a Theoretical Center in a Finite Universe?
  • · Replies 6 ·
Replies
6
Views
2K
High School Observers sending signals to measure expansion
  • · Replies 5 ·
Replies
5
Views
2K
High School No way to catch up with galaxies currently receding at >c?
  • · Replies 5 ·
Replies
5
Views
2K
High School Is an infinite universe compatible with cyclic models?
  • · Replies 1 ·
Replies
1
Views
2K
High School Confused About the Source of CMB Photons: Two Possibilities
  • · Replies 7 ·
Replies
7
Views
3K
High School According to current physics, is vacuum still something or nothing?
  • · Replies 40 ·
2
Replies
40
Views
5K
High School Are there more theories about the start of our Universe?
  • · Replies 22 ·
Replies
22
Views
3K
High School Can we measure acceleration of galaxies and stars?
  • · Replies 1 ·
Replies
1
Views
1K
High School Why does MOND fit rotation curves so exactly?
  • · Replies 14 ·
Replies
14
Views
3K
High School Traveling to alternate universes
  • · Replies 15 ·
Replies
15
Views
3K
High School Please help in explaining 'we are not the center of the Universe'
  • · Replies 21 ·
Replies
21
Views
2K
High School Question on paper: Inflationary spacetimes are not past-complete
  • · Replies 16 ·
Replies
16
Views
3K
High School Can particles interact without a mass?
  • · Replies 36 ·
2
Replies
36
Views
4K
High School Do Atoms Expand with the Universe?
  • · Replies 76 ·
3
Replies
76
Views
7K
High School What is the Universe expanding into?
  • · Replies 5 ·
Replies
5
Views
2K
High School Spacetime: The cause of matter?
  • · Replies 2 ·
Replies
2
Views
1K
High School Questions about dark matter, matter and elements
  • · Replies 7 ·
Replies
7
Views
2K
High School Accelerating Universe Expansion: Age & Hubble Constant
  • · Replies 3 ·
Replies
3
Views
2K
High School What happens to time as space is expanding?
  • · Replies 68 ·
3
Replies
68
Views
10K
High School Cosmological constant for the Universe's expansion
  • · Replies 5 ·
Replies
5
Views
3K
High School Feasibility of multiple "big bangs"
  • · Replies 5 ·
Replies
5
Views
1K
High School The Fate of the Universe -- Expansion or Collapse?
  • · Replies 5 ·
Replies
5
Views
2K
High School Question about "our observed universe"
  • · Replies 15 ·
Replies
15
Views
2K
High School 2D Model of the Universe as an expanding ball
  • · Replies 4 ·
Replies
4
Views
2K
High School Gravitational fields affecting each other?
  • · Replies 21 ·
Replies
21
Views
2K
High School Term for an end state of expansion?
  • · Replies 3 ·
Replies
3
Views
946
High School If the universe is infinite or repeats, can "I" exist again?
  • · Replies 2 ·
Replies
2
Views
4K
High School Request for an up to date list of cosmological theories
  • · Replies 11 ·
Replies
11
Views
2K
High School A question about which Cosmology theories are mainstream and how?
  • · Replies 5 ·
Replies
5
Views
2K
High School Early Universe Radiation: Gamma to Microwave?
  • · Replies 42 ·
2
Replies
42
Views
5K
High School Value of G Changing Over Time?
  • · Replies 22 ·
Replies
22
Views
1K
High School How can the Observable Universe be a closed system?
  • · Replies 37 ·
2
Replies
37
Views
6K
High School The Universe is now closed and curved?
  • · Replies 26 ·
Replies
26
Views
4K
High School Does Dark Matter Have a Periodic Table?
  • · Replies 12 ·
Replies
12
Views
2K
High School Did the Big Bang expand faster than light?
  • · Replies 26 ·
Replies
26
Views
4K
High School Can We See Beyond the Voids in Our Universe?
  • · Replies 14 ·
Replies
14
Views
2K
High School The infinite and the infinitesimal
  • · Replies 10 ·
Replies
10
Views
3K
High School An interesting consequence of the closedness of the Cosmos
  • · Replies 13 ·
Replies
13
Views
2K
High School How can dark energy comprise 74% of the Universe?
  • · Replies 36 ·
2
Replies
36
Views
4K
High School Did the Big Bang follow multiple bangs? How did matter come to collide?
  • · Replies 43 ·
2
Replies
43
Views
5K
High School How does the cosmological constant affect gravitational collapse?
  • · Replies 2 ·
Replies
2
Views
2K
High School Dark matter interactions other than gravity
  • · Replies 12 ·
Replies
12
Views
3K
High School New theory of the early Universe
  • · Replies 1 ·
Replies
1
Views
2K
High School Question about calculating the density of the Universe
  • · Replies 2 ·
Replies
2
Views
2K
High School Difference between an Einstein frame and a String frame?
  • · Replies 4 ·
Replies
4
Views
3K
High School Is the Big Bang only about the observable Universe?
  • · Replies 6 ·
Replies
6
Views
3K
High School Questions about the Curvaton particle
  • · Replies 5 ·
Replies
5
Views
1K
High School Finding the present day distance to a galaxy
  • · Replies 1 ·
Replies
1
Views
1K
High School Can Time Truly Flow Backwards in Quantum Physics and Cosmology?
  • · Replies 51 ·
2
Replies
51
Views
6K
High School Question about the size of atoms as time progressed
  • · Replies 14 ·
Replies
14
Views
2K
High School Why does our Universe have more electrons than positrons?
  • · Replies 7 ·
Replies
7
Views
4K
High School Dark matter does not interact with ordinary matter....
  • · Replies 5 ·
Replies
5
Views
2K
High School The accelerated expansion of the universe; redshift and time/distance
  • · Replies 3 ·
Replies
3
Views
2K
High School A Meritable Veritable Time Paradox?
  • · Replies 16 ·
Replies
16
Views
2K
High School Low entropy early Universe and the heat death musings
  • · Replies 5 ·
Replies
5
Views
3K
High School How was the amount of matter in the Universe determined?
  • · Replies 18 ·
Replies
18
Views
2K
High School Did energy begin to exist? Can energy exist without space and time?
  • · Replies 3 ·
Replies
3
Views
2K
High School Does the Universe really have to be at least as old as the oldest thing in it?
  • · Replies 4 ·
Replies
4
Views
2K
High School Quantum total eclipse of the sun?
  • · Replies 3 ·
Replies
3
Views
1K
High School What is Consciousness? How does it affect our Physical Universe?
  • · Replies 6 ·
Replies
6
Views
2K
High School Half of the Universe’s ordinary matter may have been found
  • · Replies 3 ·
Replies
3
Views
1K
High School Lensing Gravitational Waves Like Light?
  • · Replies 4 ·
Replies
4
Views
2K
High School Is the Universe Truly Finite According to the Big Bang Theory?
  • · Replies 17 ·
Replies
17
Views
3K
High School How does emergent spacetime work?
  • · Replies 34 ·
2
Replies
34
Views
4K
High School If the Multiverse is correct why don't they appear inside our own?
  • · Replies 34 ·
2
Replies
34
Views
3K