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Cosmology Forum

Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.

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I Curve fitting the luminosity distance and redshift data

Jun 16, 2018 · Replies 5 · Jun 18, 2018

Replies: 5

Views: 2K

B Could Gravitational Waves Allow for Time Travel?

Jun 17, 2018 · Replies 7 · Jun 18, 2018

Replies: 7

Views: 2K

B Does Negative Mass Impact Expansion in Vacuum Space?

Jun 17, 2018 · Replies 6 · Jun 18, 2018

Replies: 6

Views: 2K

I Why was the early universe's entropy low?

Jun 17, 2018 · Replies 1 · Jun 18, 2018

Replies: 1

Views: 2K

I Does the Uncertainty Principle imply a linear cosmology?

Jun 14, 2018 · Replies 3 · Jun 14, 2018

Replies: 3

Views: 2K

B Doesn't there have to be more than one observable universe?

May 16, 2018 · Replies 41 · Jun 6, 2018

2

Replies: 41

Views: 7K

I Big Bang Singularity: Was It As "Infinitely Dense" As We Think?

May 29, 2018 · Replies 35 · Jun 5, 2018

2

Replies: 35

Views: 6K

I Does red shift approach infinite near time zero?

Jun 1, 2018 · Replies 14 · Jun 3, 2018

Replies: 14

Views: 2K

I Where Did the Universe's Antimatter Go?

Jun 3, 2018 · Replies 2 · Jun 3, 2018

Replies: 2

Views: 1K

I Galaxy with no dark matter? (NGC1052-DF2)

Mar 28, 2018 · Replies 108 · Jun 1, 2018

4

Replies: 108

Views: 13K

B Threshold of gravitational pull over dark energy

May 21, 2018 · Replies 66 · May 31, 2018

3

Replies: 66

Views: 5K

B Bubble universes and infinite in extent

May 13, 2018 · Replies 28 · May 24, 2018

Replies: 28

Views: 5K

I Have we measured the change in the red shift over time?

May 15, 2018 · Replies 3 · May 23, 2018

Replies: 3

Views: 2K

B The Future of the Universe: When Will It End?

May 19, 2018 · Replies 28 · May 22, 2018

Replies: 28

Views: 5K

I Conservation of Energy on the Cosmological Scale

May 20, 2018 · Replies 2 · May 21, 2018

Replies: 2

Views: 2K

B Photon mean free path (regarding CMB black body assumption)

May 18, 2018 · Replies 7 · May 18, 2018

Replies: 7

Views: 2K

I Cosmological Redshift and Heisenberg Uncertainty Principle

May 15, 2018 · Replies 5 · May 15, 2018

Replies: 5

Views: 2K

B How Did the Big Bang Happen If the Speed of Light Is a Limit?

Apr 13, 2018 · Replies 13 · May 13, 2018

Replies: 13

Views: 3K

I SU(2) invariance implies isotropy?

May 10, 2018 · Replies 7 · May 12, 2018

Replies: 7

Views: 2K

A Multiverse reduction in the new Hawking/Hertog model?

May 4, 2018 · Replies 28 · May 10, 2018

Replies: 28

Views: 4K

I Question about accelerating expansion

May 7, 2018 · Replies 1 · May 7, 2018

Replies: 1

Views: 1K

A Dark energy = cosmological constant, any problems with that?

Apr 20, 2018 · Replies 153 · May 7, 2018

6

Replies: 153

Views: 12K

I Simulated Reality: Proving Our Universe Is Real?

May 7, 2018 · Replies 5 · May 7, 2018

Replies: 5

Views: 1K

I Vertical axis of the CMB power spectrum

Apr 28, 2018 · Replies 3 · May 7, 2018

Replies: 3

Views: 2K

B Did the Big Bang create space and time?

May 5, 2018 · Replies 9 · May 6, 2018

Replies: 9

Views: 3K

I What will happen to the Hubble value if dark energy is dynamic and decreasing?

May 2, 2018 · Replies 20 · May 4, 2018

Replies: 20

Views: 3K

I "Centaurus A Contradicts Dark Matter Models"

May 2, 2018 · Replies 4 · May 4, 2018

Replies: 4

Views: 2K

B Mutually orbiting bodies in an isolated universe

May 1, 2018 · Replies 10 · May 3, 2018

Replies: 10

Views: 1K

B No Imbalance between Matter/AntiMatter

May 1, 2018 · Replies 7 · May 2, 2018

Replies: 7

Views: 2K

I Why is a statistical explanation for Baryon Asymmetry wrong?

May 1, 2018 · Replies 2 · May 2, 2018

Replies: 2

Views: 1K

B The Universe without Cosmic Inflation?

Feb 3, 2018 · Replies 82 · May 1, 2018

3

Replies: 82

Views: 9K

B Lack of time dilation in type 1a supernova

Apr 30, 2018 · Replies 4 · Apr 30, 2018

Replies: 4

Views: 2K

B Are the 3 space dimensions "equal"?

Apr 26, 2018 · Replies 11 · Apr 30, 2018

Replies: 11

Views: 2K

I Does dark matter contribute to my body mass?

Apr 29, 2018 · Replies 4 · Apr 30, 2018

Replies: 4

Views: 2K

I Getting the wrong multipole for 1st acoustic peak

Aug 19, 2017 · Replies 6 · Apr 28, 2018

Replies: 6

Views: 2K

I Shape of the universe, and a few other questions....

Apr 26, 2018 · Replies 5 · Apr 26, 2018

Replies: 5

Views: 2K

I 10,000 black holes near Sagittarius A ?

Apr 21, 2018 · Replies 10 · Apr 26, 2018

Replies: 10

Views: 2K

B Are heliocentrism and geocentrism both correct?

Apr 23, 2018 · Replies 6 · Apr 23, 2018

Replies: 6

Views: 4K

I How does one actually compute a correlation function?

Apr 21, 2018 · Replies 10 · Apr 23, 2018

Replies: 10

Views: 2K

I Observational evidence against expanding universe in MNRAS

Mar 25, 2018 · Replies 141 · Apr 22, 2018

5

Replies: 141

Views: 19K

B How dense was the first starfield we might have seen?

Apr 6, 2018 · Replies 10 · Apr 19, 2018

Replies: 10

Views: 2K

I The deviation of Universe expansion from general relativity

Apr 11, 2018 · Replies 22 · Apr 18, 2018

Replies: 22

Views: 3K

B What fraction of the matter in the universe is in black holes?

Apr 6, 2018 · Replies 15 · Apr 16, 2018

Replies: 15

Views: 3K

B Does Hubble's Law imply that galaxies are accelerating away

Apr 13, 2018 · Replies 5 · Apr 14, 2018

Replies: 5

Views: 2K

A Comoving distance, causality volume and entropy

Apr 13, 2018 · Replies 1 · Apr 13, 2018

Replies: 1

Views: 2K

I Where are the Constants of Nature stored in Multiverse?

Apr 10, 2018 · Replies 11 · Apr 13, 2018

Replies: 11

Views: 2K

I Quantum foam ruled out by distant quasars

Apr 8, 2018 · Replies 2 · Apr 10, 2018

Replies: 2

Views: 1K

I Are there any local effects of Einstein-de Sitter expansion?

Apr 6, 2018 · Replies 14 · Apr 9, 2018

Replies: 14

Views: 2K

I Calculating recession vs attraction

Apr 8, 2018 · Replies 8 · Apr 9, 2018

Replies: 8

Views: 2K

I Inter-Bubble Connections in Inflationary Multiverse Models?

Apr 9, 2018 · Replies 4 · Apr 9, 2018

Replies: 4

Views: 2K

I Has cosmic background radiation been measured underground?

Apr 6, 2018 · Replies 13 · Apr 7, 2018

Replies: 13

Views: 3K

B Documentary about Hawkings contributions to science

Mar 23, 2018 · Replies 3 · Apr 5, 2018

Replies: 3

Views: 2K

B Speed of Light Puzzle: Is c a Localized Value?

Apr 3, 2018 · Replies 43 · Apr 4, 2018

2

Replies: 43

Views: 4K

I Is a galaxy's halo displaced dark matter?

Apr 4, 2018 · Replies 1 · Apr 4, 2018

Replies: 1

Views: 2K

B Gravity of Universe A Million Years Ago: Affect Us?

Apr 1, 2018 · Replies 8 · Apr 3, 2018

Replies: 8

Views: 2K

B How can particles escape from a black hole?

Mar 23, 2018 · Replies 12 · Apr 1, 2018

Replies: 12

Views: 2K

I Why are non-relativistic particles not redshifted?

Mar 30, 2018 · Replies 7 · Mar 31, 2018

Replies: 7

Views: 2K

I Observational Evidence for Metric Expansion of Space?

Mar 21, 2018 · Replies 24 · Mar 30, 2018

Replies: 24

Views: 3K

B Is there a specific unit used to measure redshift?

Mar 30, 2018 · Replies 5 · Mar 30, 2018

Replies: 5

Views: 5K

I Why is the inflationary potential self-interacting?

Mar 29, 2018 · Replies 3 · Mar 30, 2018

Replies: 3

Views: 2K

B Curvature at the center of a spherical universe

Mar 22, 2018 · Replies 11 · Mar 28, 2018

Replies: 11

Views: 2K

B How do we know that the rate of expansion of the Universe was slowing down

Mar 24, 2018 · Replies 11 · Mar 27, 2018

Replies: 11

Views: 3K

I VSl as an alternative to cosmic inflation

Mar 26, 2018 · Replies 3 · Mar 26, 2018

Replies: 3

Views: 2K

I What Triggers the Universe's Most Powerful Collisions?

Mar 22, 2018 · Replies 22 · Mar 26, 2018

Replies: 22

Views: 3K

B Does the Big Bang model rule out an eternal universe?

Sep 1, 2017 · Replies 94 · Mar 23, 2018

4

Replies: 94

Views: 9K

B Is the Big Bounce Theory Plausible?

Mar 22, 2018 · Replies 29 · Mar 22, 2018

Replies: 29

Views: 2K

I How long will the CMB be detectable?

Mar 21, 2018 · Replies 12 · Mar 21, 2018

Replies: 12

Views: 3K

I Inflation & Ω: Dark Matter & Energy Impact

Mar 18, 2018 · Replies 14 · Mar 21, 2018

Replies: 14

Views: 2K

B Does the rapid inflation of the early universe violate the speed of light?

Mar 17, 2018 · Replies 13 · Mar 18, 2018

Replies: 13

Views: 2K

I Discrepancy in the Hubble Paramater

Mar 2, 2018 · Replies 37 · Mar 17, 2018

2

Replies: 37

Views: 4K

I Is dark energy the inflow of a universal black hole?

Mar 17, 2018 · Replies 9 · Mar 17, 2018

Replies: 9

Views: 2K

B Shape of Universe | Is It Same from Every Point?

Dec 29, 2017 · Replies 31 · Mar 17, 2018

2

Replies: 31

Views: 4K

I If Dark Matter and Dark Energy exist, what produces them?

Jan 11, 2018 · Replies 9 · Mar 17, 2018

Replies: 9

Views: 3K

I Can dark matter explain dark energy?

Mar 16, 2018 · Replies 6 · Mar 16, 2018

Replies: 6

Views: 2K

B Are the Universe and Observable Universe Identical?

Mar 7, 2018 · Replies 32 · Mar 15, 2018

2

Replies: 32

Views: 3K

I How is the universe expanding if the speed of light is finite?

Feb 21, 2018 · Replies 32 · Mar 15, 2018

2

Replies: 32

Views: 4K

B Who Was the Great Man We Lost on Pi Day and Albert Einstein's Birthday?

Mar 14, 2018 · Replies 2 · Mar 14, 2018

Replies: 2

Views: 2K

B Gravity Emergent: Matter or Big Bang?

Feb 6, 2018 · Replies 10 · Mar 13, 2018

Replies: 10

Views: 3K

I Does space have its own density?

Mar 11, 2018 · Replies 1 · Mar 11, 2018

Replies: 1

Views: 2K

B What do people mean when they say the Universe is Computable

Mar 10, 2018 · Replies 5 · Mar 10, 2018

Replies: 5

Views: 2K

B Confusion about closed timelike curves

Dec 18, 2017 · Replies 25 · Mar 9, 2018

Replies: 25

Views: 4K

I Are Friedman Equations Valid at the Moment of the Big Bang?

Mar 6, 2018 · Replies 1 · Mar 6, 2018

Replies: 1

Views: 2K

I Do dark matter and dark energy have an effect on the red shift?

Feb 24, 2018 · Replies 41 · Mar 6, 2018

2

Replies: 41

Views: 5K

B How can the Universe be infinite and yet have a finite age?

Aug 27, 2016 · Replies 62 · Mar 5, 2018

3

Replies: 62

Views: 6K

B Is Space Expanding in a Relativistic Way?

Mar 2, 2018 · Replies 7 · Mar 2, 2018

Replies: 7

Views: 1K

I Universe's First Stars Interaction with Dark Matter

Feb 28, 2018 · Replies 2 · Feb 28, 2018

Replies: 2

Views: 2K

I Heat death of the universe and the 3rd law of thermodynamics

Feb 28, 2018 · Replies 4 · Feb 28, 2018

Replies: 4

Views: 3K

B Black holes and universe expansion

Jan 30, 2018 · Replies 22 · Feb 28, 2018

Replies: 22

Views: 3K

Is the Universe a Mathematical Simulation?

Feb 27, 2018 · Replies 3 · Feb 27, 2018

Replies: 3

Views: 1K

B Dark energy causing universe expansion?

Jan 30, 2018 · Replies 18 · Feb 20, 2018

Replies: 18

Views: 3K

I Help me understand these cosmological horizons and graphics

Feb 20, 2018 · Replies 7 · Feb 20, 2018

Replies: 7

Views: 2K

B Current values for Friedman's scalar and its derivative?

Feb 20, 2018 · Replies 4 · Feb 20, 2018

Replies: 4

Views: 1K

B Accelerated expansion of the universe

Feb 12, 2018 · Replies 9 · Feb 19, 2018

Replies: 9

Views: 2K

B Black hole gravitational pull questions

Jan 28, 2018 · Replies 30 · Feb 19, 2018

2

Replies: 30

Views: 3K

B Black Holes Must Have Singularities Says Einstein Relativity

Feb 14, 2018 · Replies 6 · Feb 19, 2018

Replies: 6

Views: 2K

A Planck 2015 CMB temperature individual pixel variance

Feb 13, 2018 · Replies 6 · Feb 16, 2018

Replies: 6

Views: 2K

B Anything from Nothing: Uncovering the Possibilities

Feb 2, 2018 · Replies 41 · Feb 13, 2018

2

Replies: 41

Views: 5K

I Continuous Lensing Models: Discrete Data

Feb 12, 2018 · Replies 1 · Feb 12, 2018

Replies: 1

Views: 1K

B Is cosmopsychism theory just babble copied from The Force?

Feb 10, 2018 · Replies 1 · Feb 10, 2018

Replies: 1

Views: 1K

I Mass in the early universe and the CCC model

Feb 8, 2018 · Replies 15 · Feb 9, 2018

Replies: 15

Views: 2K

Cosmology

Cosmology is the scientific study of the large-scale structure, origin, evolution, and ultimate fate of the universe. It seeks to understand the fundamental nature of the cosmos, including the distribution of galaxies, dark matter, dark energy, and the overall geometry of space-time. Cosmologists explore the early moments of the universe, moments after the Big Bang, and employ various observational tools, such as telescopes and satellites, to gather data that informs our understanding of cosmic evolution.

Key concepts in cosmology include the expansion of the universe, cosmic microwave background radiation, and the formation of galaxies and large-scale structures. It is a field that intersects with physics, astronomy, and astrophysics, providing insights into the vast and intricate tapestry of the cosmos.

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