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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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A The unification of quantum theory and relativity theory

Dec 18, 2015 · Replies 1 · Dec 18, 2015

Replies: 1

Views: 1K

Amount of dark Energy at different times

Dec 17, 2015 · Replies 3 · Dec 18, 2015

Replies: 3

Views: 1K

Number density: Initial fluctuation strength and more....

Dec 17, 2015 · Replies 2 · Dec 18, 2015

Replies: 2

Views: 1K

Regarding the relationship of mass, velocity, and time

Dec 17, 2015 · Replies 1 · Dec 17, 2015

Replies: 1

Views: 1K

White Holes: Real or Hypothesis?

Apr 28, 2013 · Replies 27 · Dec 17, 2015

Replies: 27

Views: 6K

Are Electrons Really Indistinguishable in the One Electron Universe?

Dec 16, 2015 · Replies 5 · Dec 16, 2015

Replies: 5

Views: 2K

Acceleration and Dark Energy Clarification

Dec 15, 2015 · Replies 1 · Dec 15, 2015

Replies: 1

Views: 1K

CMB Depth: 115000 LY & Its Impact on Analysis

Nov 17, 2015 · Replies 13 · Dec 15, 2015

Replies: 13

Views: 3K

Question about Recombination Redshift values

Dec 13, 2015 · Replies 5 · Dec 14, 2015

Replies: 5

Views: 2K

Why do Quantum Fluctuations need Inflation?

Dec 9, 2015 · Replies 14 · Dec 14, 2015

Replies: 14

Views: 2K

Inflation and Curvature: Examining the Relationship Since the Big Bang

Dec 14, 2015 · Replies 3 · Dec 14, 2015

Replies: 3

Views: 1K

How redshift/brightness lead to acceleration/deceleration?

Dec 13, 2015 · Replies 4 · Dec 14, 2015

Replies: 4

Views: 2K

Understanding Dark Energy and the Accelerating Expansion of the Universe

Dec 13, 2015 · Replies 7 · Dec 14, 2015

Replies: 7

Views: 2K

Interesting article about dark matter

Mar 4, 2015 · Replies 16 · Dec 12, 2015

Replies: 16

Views: 2K

Theories about why the universe is expanding faster

Dec 9, 2015 · Replies 8 · Dec 11, 2015

Replies: 8

Views: 2K

Dark Energy: What is the expected form of the equation?

Dec 9, 2015 · Replies 26 · Dec 10, 2015

Replies: 26

Views: 3K

How is the first peak of the CMB calculated?

Dec 8, 2015 · Replies 6 · Dec 10, 2015

Replies: 6

Views: 4K

What is the Role of Quantum Fluctuations in the Formation of Black Holes?

Dec 9, 2015 · Replies 5 · Dec 10, 2015

Replies: 5

Views: 2K

Is it possible to shift between parallel universes?

Dec 9, 2015 · Replies 6 · Dec 9, 2015

Replies: 6

Views: 2K

Higgs Boson Decays into Dark MAtter

Nov 23, 2015 · Replies 5 · Dec 9, 2015

Replies: 5

Views: 2K

Antineutrinos Candidates for Dark Matter?

Dec 1, 2015 · Replies 6 · Dec 8, 2015

Replies: 6

Views: 2K

Were the "Dark Ages" really dark?

Nov 19, 2015 · Replies 3 · Dec 6, 2015

Replies: 3

Views: 1K

Question re equilibrium abundance of a protons and electrons

Nov 27, 2015 · Replies 12 · Dec 3, 2015

Replies: 12

Views: 2K

Inflation, comoving Hubble radius and particle horizon

Dec 1, 2015 · Replies 1 · Dec 1, 2015

Replies: 1

Views: 4K

The Big Bang Theory a Fairy Tale? So says presidential candidate Ben Carson....

Sep 30, 2015 · Replies 152 · Nov 29, 2015

6

Replies: 152

Views: 14K

Does time dilation occur between comoving galaxies?

Nov 27, 2015 · Replies 8 · Nov 28, 2015

Replies: 8

Views: 2K

Is the Universe Expanding Faster Than the Speed of Light?

Nov 25, 2015 · Replies 4 · Nov 27, 2015

Replies: 4

Views: 3K

I Question about relative abundance of particles before annihilation

Nov 21, 2015 · Replies 2 · Nov 27, 2015

Replies: 2

Views: 1K

Can space itself act as an fuel?

Nov 25, 2015 · Replies 2 · Nov 25, 2015

Replies: 2

Views: 1K

How do black holes get so massive

Nov 20, 2015 · Replies 15 · Nov 25, 2015

Replies: 15

Views: 2K

Some questions on the Cosmological Principle

Nov 12, 2015 · Replies 50 · Nov 25, 2015

2

Replies: 50

Views: 6K

Can a galaxy at z=8.68 disprove the LCDM theory?

Nov 25, 2015 · Replies 1 · Nov 25, 2015

Replies: 1

Views: 1K

An argument that massive particles don't redshift?

Nov 20, 2015 · Replies 14 · Nov 25, 2015

Replies: 14

Views: 2K

Ancient Galaxies twice the size of the Milky Way

Nov 23, 2015 · Replies 4 · Nov 24, 2015

Replies: 4

Views: 2K

The Duration of the Big Bang: Exploding Myths and Misconceptions

Oct 30, 2015 · Replies 75 · Nov 23, 2015

3

Replies: 75

Views: 8K

Does negative gravity play a role in the expansion of the universe?

Nov 22, 2015 · Replies 3 · Nov 22, 2015

Replies: 3

Views: 2K

Light beams, from the present to the time of the big bang

Nov 21, 2015 · Replies 8 · Nov 22, 2015

Replies: 8

Views: 2K

Unexpected distant values of m/r in a finite universe

Nov 21, 2015 · Replies 2 · Nov 22, 2015

Replies: 2

Views: 1K

How can radiation from the Big Bang come from all directions?

Oct 29, 2015 · Replies 43 · Nov 21, 2015

2

Replies: 43

Views: 5K

What Is the Rh = ct Cosmology?

Nov 20, 2015 · Replies 2 · Nov 20, 2015

Replies: 2

Views: 3K

Magnetic field in early universe

Nov 11, 2015 · Replies 9 · Nov 20, 2015

Replies: 9

Views: 2K

Is There Evidence for a Cyclic Universe?

Nov 19, 2015 · Replies 7 · Nov 20, 2015

Replies: 7

Views: 5K

How Does the Hypersine Function Relate to the Expansion of the Universe?

Jun 20, 2015 · Replies 86 · Nov 19, 2015

3

Replies: 86

Views: 13K

Questions re: Matter-Antimatter Annihilation

Nov 17, 2015 · Replies 8 · Nov 18, 2015

Replies: 8

Views: 2K

Cosmological expansion and uncertainty

Nov 12, 2015 · Replies 4 · Nov 17, 2015

Replies: 4

Views: 2K

WIMPs or MACHOs: Which Dark Matter Candidate Holds More Promise?

Nov 15, 2015 · Replies 5 · Nov 16, 2015

Replies: 5

Views: 2K

Does rest mass increase in conformal co-ordinates?

Nov 16, 2015 · Replies 1 · Nov 16, 2015

Replies: 1

Views: 1K

Einstein equivalence principle

Nov 15, 2015 · Replies 7 · Nov 15, 2015

Replies: 7

Views: 2K

How Does General Relativity Predict an Expanding Universe

Nov 14, 2015 · Replies 10 · Nov 14, 2015

Replies: 10

Views: 4K

Did the universe really have zero extent at the beginning?

Nov 10, 2015 · Replies 17 · Nov 14, 2015

Replies: 17

Views: 2K

Time dependence of the Ratio Hubble length to scale factor

Nov 11, 2015 · Replies 14 · Nov 14, 2015

Replies: 14

Views: 3K

B A circle in the Hubble Ultra Deep Field picture?

Nov 13, 2015 · Replies 3 · Nov 14, 2015

Replies: 3

Views: 2K

Definition of Energy in Friedmann equations?

Nov 13, 2015 · Replies 1 · Nov 13, 2015

Replies: 1

Views: 1K

Multiple big bangs in one continuum - Question

Nov 12, 2015 · Replies 29 · Nov 13, 2015

Replies: 29

Views: 3K

Visibility of Matter in the Universe

Oct 27, 2015 · Replies 17 · Nov 13, 2015

Replies: 17

Views: 2K

A Moon Landing Q&A: Solar Winds & Astronauts

Nov 11, 2015 · Replies 4 · Nov 11, 2015

Replies: 4

Views: 2K

Total mass and/or future of dark energy = cyclic universe?

Oct 26, 2015 · Replies 14 · Nov 11, 2015

Replies: 14

Views: 3K

Could Zipf's Law and Dark Matter be linked in the cosmos?

Oct 15, 2015 · Replies 14 · Nov 11, 2015

Replies: 14

Views: 3K

Gravity, Dark Matter and Dark Energy are all one

Nov 7, 2015 · Replies 5 · Nov 10, 2015

Replies: 5

Views: 2K

Cosmology's sole "rate of expansion" is declining

Oct 30, 2015 · Replies 52 · Nov 10, 2015

2

Replies: 52

Views: 8K

How can quantum tunneling create Big Bang after heat death?

Nov 2, 2015 · Replies 8 · Nov 9, 2015

Replies: 8

Views: 9K

Why is the non-zero value of spatial curvature +/- 1?

Nov 3, 2015 · Replies 7 · Nov 9, 2015

Replies: 7

Views: 2K

Is the metric basis for space expanding as the universe expands?

Nov 7, 2015 · Replies 2 · Nov 7, 2015

Replies: 2

Views: 2K

I Creating something from 'nothing' in our Universe

Nov 4, 2015 · Replies 6 · Nov 7, 2015

Replies: 6

Views: 2K

I Zero energy universe means nothing exists at all times

Nov 6, 2015 · Replies 5 · Nov 7, 2015

Replies: 5

Views: 2K

I The Universe's Sum: Is Zero Theory Plausible?

Nov 5, 2015 · Replies 9 · Nov 6, 2015

Replies: 9

Views: 2K

Trying to understand Dark Energy

Oct 28, 2015 · Replies 40 · Nov 5, 2015

2

Replies: 40

Views: 5K

Alternative hypotheses regarding dark energy?

Oct 30, 2015 · Replies 8 · Nov 5, 2015

Replies: 8

Views: 2K

Cold Spot in CMB: Real or Systemic Error?

Nov 3, 2015 · Replies 4 · Nov 5, 2015

Replies: 4

Views: 1K

How have N Body simulations solved the missing satellite problem in ΛCDM?

Nov 5, 2015 · Replies 1 · Nov 5, 2015

Replies: 1

Views: 1K

Where is Tau Ceti Located in the Night Sky?

Nov 4, 2015 · Replies 4 · Nov 4, 2015

Replies: 4

Views: 1K

Could an Electron-Proton Pair Form an Atom in an Alternative Universe?

Nov 3, 2015 · Replies 2 · Nov 3, 2015

Replies: 2

Views: 1K

Does a finite universe require 4 spatial dimensions?

Oct 30, 2015 · Replies 13 · Nov 2, 2015

Replies: 13

Views: 3K

Are modified gravity models viable

Oct 27, 2015 · Replies 15 · Nov 2, 2015

Replies: 15

Views: 2K

What does the big bang theory really tells us?

Nov 2, 2015 · Replies 2 · Nov 2, 2015

Replies: 2

Views: 2K

Is the Universe's Expansion Truly Slowing Down?

Nov 1, 2015 · Replies 2 · Nov 1, 2015

Replies: 2

Views: 1K

What proportion of stars have proper motion

Nov 1, 2015 · Replies 5 · Nov 1, 2015

Replies: 5

Views: 2K

Are the Friedmann Equations Applicable to the Pre-Inflationary Epoch?

Oct 11, 2015 · Replies 23 · Oct 31, 2015

Replies: 23

Views: 4K

Superfluid Dark Matter: A Review of Theory & Evidence

Oct 30, 2015 · Replies 1 · Oct 31, 2015

Replies: 1

Views: 1K

Is the True Vacuum in de Sitter Space Characterized by Minimum Mass?

Oct 30, 2015 · Replies 2 · Oct 30, 2015

Replies: 2

Views: 2K

Has neutrino redshift been observed?

Oct 30, 2015 · Replies 1 · Oct 30, 2015

Replies: 1

Views: 1K

I Can Quantum Time and Space Have Countable States After the Big Bang?

Oct 29, 2015 · Replies 11 · Oct 29, 2015

Replies: 11

Views: 1K

Does a rigid box of gas cool over cosmological timescales?

Oct 26, 2015 · Replies 1 · Oct 26, 2015

Replies: 1

Views: 1K

When Did We Last Get a Glimpse of the Big Bang?

Oct 13, 2015 · Replies 34 · Oct 26, 2015

2

Replies: 34

Views: 4K

Can Black Holes Really Die and What Are Their Secrets?

Nov 10, 2014 · Replies 76 · Oct 25, 2015

3

Replies: 76

Views: 8K

Origins of the Fundamental Interactions/Forces

Oct 22, 2015 · Replies 3 · Oct 24, 2015

Replies: 3

Views: 2K

Infinite Universe: Can It Ever End?

Oct 23, 2015 · Replies 6 · Oct 24, 2015

Replies: 6

Views: 2K

How can light have momentum if it has zero mass?

Jul 7, 2011 · Replies 6 · Oct 24, 2015

Replies: 6

Views: 15K

A Is Multiverse proven by Plank data?

Oct 23, 2015 · Replies 4 · Oct 23, 2015

Replies: 4

Views: 1K

Metric expansion misunderstanding

Oct 21, 2015 · Replies 13 · Oct 22, 2015

Replies: 13

Views: 2K

MOND and the missing baryons problem

Oct 15, 2015 · Replies 41 · Oct 21, 2015

2

Replies: 41

Views: 5K

No Dark Matter or gravity modification for flat rot

Oct 20, 2015 · Replies 5 · Oct 21, 2015

Replies: 5

Views: 1K

Gravitational lensing as a way of observing Milky Way?

Sep 29, 2015 · Replies 6 · Oct 20, 2015

Replies: 6

Views: 2K

The Inflaton Field And Repulsive Gravity

Jan 4, 2014 · Replies 13 · Oct 20, 2015

Replies: 13

Views: 5K

Expansion then Contraction....an infinite Elastic Collision?

Oct 17, 2015 · Replies 9 · Oct 19, 2015

Replies: 9

Views: 2K

Time, Mass & Space: Does Time Stay Consistent?

Oct 19, 2015 · Replies 2 · Oct 19, 2015

Replies: 2

Views: 1K

Is the universe fine tuned for life

Oct 18, 2015 · Replies 21 · Oct 19, 2015

Replies: 21

Views: 3K

Suggest a Quantum Physics Book for a 16 Year Old

Oct 13, 2015 · Replies 6 · Oct 18, 2015

Replies: 6

Views: 1K

I Cosmology looks beyond the standard model

Oct 13, 2015 · Replies 3 · Oct 17, 2015

Replies: 3

Views: 2K

Calculating Universe Density: Cosmology Equations

Oct 10, 2015 · Replies 7 · Oct 15, 2015

Replies: 7

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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