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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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Clearing up my Cosmological Confusion - what is expanding?

Feb 12, 2016 · Replies 1 · Feb 12, 2016

Replies: 1

Views: 2K

Insights LightCone7 Tutorial Part III - How Things are Computed - Comments

Feb 11, 2016 · Replies 1 · Feb 12, 2016

Replies: 1

Views: 1K

The big bang was a fluctuation of what?

Feb 10, 2016 · Replies 2 · Feb 11, 2016

Replies: 2

Views: 2K

Did an explosion of a Black Hole make the Big Bang

Jan 28, 2016 · Replies 13 · Feb 11, 2016

Replies: 13

Views: 3K

What are the properties of de Sitter space?

Feb 11, 2016 · Replies 4 · Feb 11, 2016

Replies: 4

Views: 2K

Dark Energy Constant: Is It Constant or Increasing?

Feb 11, 2016 · Replies 3 · Feb 11, 2016

Replies: 3

Views: 1K

How are dark energy and matter quantified?

Feb 8, 2016 · Replies 6 · Feb 11, 2016

Replies: 6

Views: 2K

Getting a feel for how much the Universe expands

Feb 7, 2016 · Replies 11 · Feb 10, 2016

Replies: 11

Views: 2K

Undergrad Has time always ticked the same?

Feb 9, 2016 · Replies 8 · Feb 9, 2016

Replies: 8

Views: 1K

Is the LCDM Model Challenged by Evidence of Running Cosmic Vacuum?

Feb 8, 2016 · Replies 7 · Feb 9, 2016

Replies: 7

Views: 3K

What is dark matter/dark energy? Are there differences?

Jan 13, 2016 · Replies 5 · Feb 9, 2016

Replies: 5

Views: 2K

Observational evidence for expansion of universe....

Feb 8, 2016 · Replies 2 · Feb 8, 2016

Replies: 2

Views: 1K

Is Time Reversal Possible? New Research Challenges Long-Held Assumptions

Feb 2, 2016 · Replies 4 · Feb 8, 2016

Replies: 4

Views: 2K

Proper distance for co-moving bodies

Feb 6, 2016 · Replies 4 · Feb 6, 2016

Replies: 4

Views: 2K

Expansion of the universe and quantum perturbations

Jan 31, 2016 · Replies 23 · Feb 5, 2016

Replies: 23

Views: 3K

Can Anyone Explain the Spin Foam Model in Simple Terms?

Jan 27, 2016 · Replies 8 · Feb 5, 2016

Replies: 8

Views: 1K

Does the mass of subatomic particles differ on different planets?

Feb 5, 2016 · Replies 7 · Feb 5, 2016

Replies: 7

Views: 2K

Ending point for initial condition theories

Feb 4, 2016 · Replies 2 · Feb 4, 2016

Replies: 2

Views: 2K

Ability to measure distances with parallax versus size

Feb 2, 2016 · Replies 4 · Feb 3, 2016

Replies: 4

Views: 2K

Gamma rays unlikely to originate from Dark Matter

Feb 3, 2016 · Replies 3 · Feb 3, 2016

Replies: 3

Views: 1K

Understanding Virialized Dark Matter Halos in Galaxy Formation

Feb 2, 2016 · Replies 3 · Feb 3, 2016

Replies: 3

Views: 2K

What was the role of Hawking Radiation in the early universe?

Jan 31, 2016 · Replies 14 · Feb 2, 2016

Replies: 14

Views: 2K

Is Dark Energy Really Necessary for Explaining Cosmic Expansion?

Feb 1, 2016 · Replies 3 · Feb 2, 2016

Replies: 3

Views: 2K

Insights Knut Lundmark and the Prehistory of Dark Matter - Comments

Jan 30, 2016 · Replies 15 · Feb 2, 2016

Replies: 15

Views: 2K

Insights LightCone7Combo Tutorial Part II - Charts - Comments

Jan 26, 2016 · Replies 3 · Feb 1, 2016

Replies: 3

Views: 2K

Graduate Expanding space or contracting matter?

Jan 31, 2016 · Replies 7 · Jan 31, 2016

Replies: 7

Views: 2K

Another newbie question: paradox: size vs. age

Jan 14, 2016 · Replies 13 · Jan 29, 2016

Replies: 13

Views: 2K

Orbits in Universe: Milky Way, Sun, Moon & More

Jan 29, 2016 · Replies 5 · Jan 29, 2016

Replies: 5

Views: 2K

How does the expansion of the universe work?

Dec 29, 2015 · Replies 112 · Jan 29, 2016

4

Replies: 112

Views: 13K

Gaussian vs. non-Gaussian fluctuations

Jan 27, 2016 · Replies 5 · Jan 28, 2016

Replies: 5

Views: 2K

CMBR, Dark Matter: Unraveling What it Means

Jan 27, 2016 · Replies 6 · Jan 28, 2016

Replies: 6

Views: 2K

What are Black Hole Singularities: Physical or Mathematical?

Jan 28, 2016 · Replies 2 · Jan 28, 2016

Replies: 2

Views: 2K

Comments - Inflationary Misconceptions and the Basics of Cosmological Horizons

Aug 28, 2015 · Replies 45 · Jan 28, 2016

2

Replies: 45

Views: 5K

Is space an entity, a relationship or a concetual framework?

Jan 13, 2016 · Replies 40 · Jan 27, 2016

2

Replies: 40

Views: 6K

High School What Is the Evidence for Dark Matter and Dark Energy?

Mar 23, 2015 · Replies 19 · Jan 27, 2016

Replies: 19

Views: 3K

Does this dynamic model complement the Balloon Analogy?

Jan 26, 2016 · Replies 4 · Jan 27, 2016

Replies: 4

Views: 2K

What constitutes negative and positive energy

Jan 22, 2016 · Replies 21 · Jan 26, 2016

Replies: 21

Views: 5K

Question Concerning the Rate of Expansion

Jan 25, 2016 · Replies 7 · Jan 26, 2016

Replies: 7

Views: 2K

Dark Energy in Relation to Spacetime

Jan 23, 2016 · Replies 12 · Jan 24, 2016

Replies: 12

Views: 2K

Did Black Holes appear in the first billion years?

Jan 23, 2016 · Replies 4 · Jan 24, 2016

Replies: 4

Views: 2K

Space-Time Distortion and Warp-Drive

Jul 18, 2015 · Replies 8 · Jan 23, 2016

Replies: 8

Views: 2K

How Does Normalization in LightCone7zeit Enhance Cosmological Graph Comparisons?

Jan 9, 2016 · Replies 8 · Jan 23, 2016

Replies: 8

Views: 3K

Insights LightCone7Combo Tutorial Part I - Comments

Jan 21, 2016 · Replies 2 · Jan 22, 2016

Replies: 2

Views: 2K

Supermassive black hole evolution

Jan 22, 2016 · Replies 1 · Jan 22, 2016

Replies: 1

Views: 1K

Calculating Relative Brightness of Type Ia Supernovae

Jan 21, 2016 · Replies 5 · Jan 22, 2016

Replies: 5

Views: 1K

Speed of light from BB to present day

Jan 18, 2016 · Replies 20 · Jan 21, 2016

Replies: 20

Views: 2K

Speed of light/electromagnetic waves is constant?

Jan 20, 2016 · Replies 6 · Jan 21, 2016

Replies: 6

Views: 2K

Sigma_8 and n_s Cosmological Parameters

Jan 20, 2016 · Replies 2 · Jan 20, 2016

Replies: 2

Views: 3K

Insights Can We Tell Whether the Universe Is Rotating? - Comments

Nov 10, 2015 · Replies 3 · Jan 19, 2016

Replies: 3

Views: 3K

Question regarding Friedmann equation

Jan 16, 2016 · Replies 9 · Jan 18, 2016

Replies: 9

Views: 2K

The Simpson-Hawking Donut Universe

Jan 18, 2016 · Replies 1 · Jan 18, 2016

Replies: 1

Views: 1K

High School Can Cosmology Be Experimentally Verified?

Jan 17, 2016 · Replies 3 · Jan 18, 2016

Replies: 3

Views: 1K

Black hole singularty definable In 3D space?

Jan 18, 2016 · Replies 4 · Jan 18, 2016

Replies: 4

Views: 2K

Undergrad Expanding Universe: Big Bang & Beyond

Jan 17, 2016 · Replies 2 · Jan 17, 2016

Replies: 2

Views: 1K

How fast was the expansion during the big bang?

Dec 27, 2015 · Replies 35 · Jan 17, 2016

2

Replies: 35

Views: 5K

Loop quantum cosmology vs string cosmology

Jan 12, 2016 · Replies 7 · Jan 16, 2016

Replies: 7

Views: 2K

Questions about the topology of the universe

Jan 16, 2016 · Replies 3 · Jan 16, 2016

Replies: 3

Views: 2K

Could the Universe's Expansion Form a 'Clock' in a Hot Big Bang Scenario?

Dec 29, 2015 · Replies 6 · Jan 15, 2016

Replies: 6

Views: 2K

Expanding universe and age of light

Jan 13, 2016 · Replies 21 · Jan 14, 2016

Replies: 21

Views: 3K

Can the Universe Transition from Finite to Infinite?

Jan 13, 2016 · Replies 8 · Jan 14, 2016

Replies: 8

Views: 2K

Does mass slow the expansion of space?

Jan 11, 2016 · Replies 5 · Jan 12, 2016

Replies: 5

Views: 2K

Can Higgs be the inflaton - can LHC produce an inflaton 750

Jan 11, 2016 · Replies 2 · Jan 12, 2016

Replies: 2

Views: 1K

Is There Direct Evidence of Cosmic Re-acceleration?

Jan 11, 2016 · Replies 1 · Jan 12, 2016

Replies: 1

Views: 2K

An article stating Cosmology is in crisis. Is it in crisis?

Jan 11, 2016 · Replies 3 · Jan 11, 2016

Replies: 3

Views: 2K

Insights The Balloon Analogy .... the Good, the Bad, and the Ugly - Comments

Sep 16, 2015 · Replies 58 · Jan 9, 2016

2

Replies: 58

Views: 9K

Quark Overproduction in the Big Rip Theory

Jan 7, 2016 · Replies 1 · Jan 9, 2016

Replies: 1

Views: 3K

How do we know that the universe is three dimensional?

Jan 8, 2016 · Replies 5 · Jan 8, 2016

Replies: 5

Views: 2K

Why does dark matter pool in the CMB plasma?

Jan 5, 2016 · Replies 11 · Jan 6, 2016

Replies: 11

Views: 2K

Conservation of energy and space expansion

Jan 4, 2016 · Replies 4 · Jan 5, 2016

Replies: 4

Views: 2K

Question reguarding the expanding universe

Nov 2, 2015 · Replies 42 · Jan 5, 2016

2

Replies: 42

Views: 4K

Why is there no continuity on the temperature of the CMB?

Jan 4, 2016 · Replies 6 · Jan 5, 2016

Replies: 6

Views: 2K

The Science Behind Children's Love for Cinnamon Toast Crunch

Jan 5, 2016 · Replies 2 · Jan 5, 2016

Replies: 2

Views: 1K

How E Folds relates to our universe

Jan 2, 2016 · Replies 3 · Jan 3, 2016

Replies: 3

Views: 2K

What is the energy in a cubic km of empty space?

Jan 3, 2016 · Replies 5 · Jan 3, 2016

Replies: 5

Views: 2K

Searching for Dark Matter in 3.5 Kev Line Mystery

Dec 23, 2015 · Replies 2 · Jan 3, 2016

Replies: 2

Views: 2K

How Does Supernova Light Dimness Indicate Universal Acceleration?

Dec 31, 2015 · Replies 9 · Jan 3, 2016

Replies: 9

Views: 2K

Another age problem in the early universe?

Jan 3, 2016 · Replies 2 · Jan 3, 2016

Replies: 2

Views: 2K

High School Birth of the Earth: Big Bang, Dark Matter & More

Jan 2, 2016 · Replies 4 · Jan 2, 2016

Replies: 4

Views: 2K

How could the infant universe have existed as a singularity?

Dec 31, 2015 · Replies 6 · Jan 1, 2016

Replies: 6

Views: 2K

Relationship between energy, information and dark energy

Dec 31, 2015 · Replies 8 · Dec 31, 2015

Replies: 8

Views: 3K

Distinction between observable and unobservable universe

Dec 30, 2015 · Replies 11 · Dec 30, 2015

Replies: 11

Views: 3K

Universe Expansion: Is it Possible Beyond Light Speed?

Dec 29, 2015 · Replies 1 · Dec 29, 2015

Replies: 1

Views: 2K

How is time incorporated into the robertson walker metric?

Dec 29, 2015 · Replies 6 · Dec 29, 2015

Replies: 6

Views: 2K

Expansion of the Universe and Thermodynamics

Dec 28, 2015 · Replies 18 · Dec 28, 2015

Replies: 18

Views: 3K

Measuring space expansion without redshift

Dec 27, 2015 · Replies 9 · Dec 28, 2015

Replies: 9

Views: 2K

How can an inflaton field maintain its energy while expanding without diluting?

Dec 28, 2015 · Replies 8 · Dec 28, 2015

Replies: 8

Views: 2K

Information on Dark Matter and Dark Energy

Dec 27, 2015 · Replies 4 · Dec 27, 2015

Replies: 4

Views: 3K

Can the Universe Expand Faster Than Light?

Nov 22, 2015 · Replies 51 · Dec 27, 2015

2

Replies: 51

Views: 7K

Might Dark Energy have anything to do with Inflation?

Dec 16, 2015 · Replies 6 · Dec 27, 2015

Replies: 6

Views: 2K

Proper distance integral limits seem wrong

Dec 24, 2015 · Replies 2 · Dec 25, 2015

Replies: 2

Views: 1K

Undergrad Another math in another universe?

Dec 25, 2015 · Replies 4 · Dec 25, 2015

Replies: 4

Views: 1K

Space Expanding Proportional to Distance

Dec 23, 2015 · Replies 11 · Dec 24, 2015

Replies: 11

Views: 2K

Why does the universe have no net charge?

Nov 18, 2015 · Replies 20 · Dec 23, 2015

Replies: 20

Views: 4K

New valuation of ΛCDM Cosmology by 41 authors....

Dec 20, 2015 · Replies 6 · Dec 23, 2015

Replies: 6

Views: 2K

Size of Universe: Evidence of Finite Limits?

Dec 23, 2015 · Replies 8 · Dec 23, 2015

Replies: 8

Views: 2K

How cosmologists determine universe flatness

Dec 19, 2015 · Replies 4 · Dec 23, 2015

Replies: 4

Views: 2K

Proper distance problem/interpretation

Dec 23, 2015 · Replies 4 · Dec 23, 2015

Replies: 4

Views: 1K

Could Dark Energy lead to a big bang?

Dec 22, 2015 · Replies 3 · Dec 22, 2015

Replies: 3

Views: 2K

Does accretion reduce the magnetic field of a neutron star?

Dec 17, 2015 · Replies 11 · Dec 22, 2015

Replies: 11

Views: 2K

Why is it that scientists think that dark matter annihilates

Dec 21, 2015 · Replies 4 · Dec 22, 2015

Replies: 4

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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