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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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Searching for Dark Energy, Dark Matter & Gravitational Radiation

Apr 17, 2013 · Replies 4 · Apr 17, 2013

Replies: 4

Views: 2K

Our ideas on v_rec/c column added to J's calculator

Apr 14, 2013 · Replies 31 · Apr 17, 2013

2

Replies: 31

Views: 4K

Does three Dimension realy exsist and why?

Apr 16, 2013 · Replies 2 · Apr 17, 2013

Replies: 2

Views: 2K

Report on expansion history of universe

Apr 16, 2013 · Replies 3 · Apr 16, 2013

Replies: 3

Views: 2K

Is Dark Matter Finally Revealing Its Secrets?

Apr 15, 2013 · Replies 1 · Apr 15, 2013

Replies: 1

Views: 2K

How exactly does the universe expand?

Apr 13, 2013 · Replies 16 · Apr 15, 2013

Replies: 16

Views: 4K

Stress Energy Tensor - Confusion about signs and metrics

Apr 14, 2013 · Replies 2 · Apr 14, 2013

Replies: 2

Views: 2K

What Was the Initial Energy of the Universe: Planck Energy or Singularity?

Apr 13, 2013 · Replies 3 · Apr 14, 2013

Replies: 3

Views: 2K

Could Dark Energy be concentrated inside galactic bubbles?

Apr 12, 2013 · Replies 5 · Apr 14, 2013

Replies: 5

Views: 2K

Cosmological Observations Conundrum

Jan 24, 2013 · Replies 43 · Apr 13, 2013

2

Replies: 43

Views: 9K

Is Big Bang a Misleading Term for Describing the Early Universe?

Apr 12, 2013 · Replies 1 · Apr 12, 2013

Replies: 1

Views: 2K

Is the Solar system expanding with the Universe?

Apr 11, 2013 · Replies 7 · Apr 12, 2013

Replies: 7

Views: 6K

The awkward expression 1 km/s per Mpc-the radius is better

Apr 7, 2013 · Replies 12 · Apr 9, 2013

Replies: 12

Views: 4K

Is the Universe Organized or Chaotic in its Younger Years?

Apr 7, 2013 · Replies 11 · Apr 8, 2013

Replies: 11

Views: 3K

Shape of Universe: Is Flatness Approved? Causes of Big Crunch

Mar 2, 2013 · Replies 119 · Apr 8, 2013

4

Replies: 119

Views: 17K

Is there a place in the Universe without any matter and energy?

May 27, 2011 · Replies 12 · Apr 7, 2013

Replies: 12

Views: 12K

It's a rate (not a constant) so let's call it that

Apr 5, 2013 · Replies 8 · Apr 7, 2013

Replies: 8

Views: 3K

Nature of spacetime and interest in the field

Apr 5, 2013 · Replies 1 · Apr 5, 2013

Replies: 1

Views: 2K

What's the latest update on the possible discovery of dark matter?

Mar 26, 2013 · Replies 13 · Apr 4, 2013

Replies: 13

Views: 3K

What is the relationship between light and space?

Apr 2, 2013 · Replies 7 · Apr 4, 2013

Replies: 7

Views: 5K

Which Planck numbers to use? (Ned Wright's choice?)

Apr 3, 2013 · Replies 10 · Apr 4, 2013

Replies: 10

Views: 3K

Thoughts/Questions about GR and dark matter

Apr 3, 2013 · Replies 3 · Apr 4, 2013

Replies: 3

Views: 2K

Would Dark Energy Alter Layzer's Entropy Model?

Mar 31, 2013 · Replies 8 · Apr 4, 2013

Replies: 8

Views: 3K

Formula for the dark energy density (dark energy formula)

Oct 21, 2011 · Replies 5 · Apr 3, 2013

Replies: 5

Views: 6K

Challenging the Big Bang: Addressing Objections to the Expanding Universe Theory

Apr 3, 2013 · Replies 13 · Apr 3, 2013

Replies: 13

Views: 9K

Redshift at 11.9 and the Hubble Constant

Apr 2, 2013 · Replies 11 · Apr 3, 2013

Replies: 11

Views: 4K

Is it wrong to see the bang as insertion of space?

Apr 2, 2013 · Replies 8 · Apr 2, 2013

Replies: 8

Views: 3K

Cosmological redshift, how fast can the universe expand?

Apr 1, 2013 · Replies 16 · Apr 2, 2013

Replies: 16

Views: 4K

Given expansion, finally each particle will have only 1 neighbor

Mar 29, 2013 · Replies 10 · Apr 2, 2013

Replies: 10

Views: 2K

Why Stephen Hawking says universe can create itself from nothing?

Feb 24, 2013 · Replies 81 · Apr 2, 2013

3

Replies: 81

Views: 17K

Singularity Paradoxes: Nothing or Something?

Apr 1, 2013 · Replies 4 · Apr 2, 2013

Replies: 4

Views: 2K

Did Quasars Play a Role in the Formation of Galaxies?

Mar 31, 2013 · Replies 17 · Apr 1, 2013

Replies: 17

Views: 4K

Conspiratorial cosmology - the case against the Universe

Apr 1, 2013 · Replies 1 · Apr 1, 2013

Replies: 1

Views: 2K

When Will the Big Crunch Happen According to Current Models?

Mar 30, 2013 · Replies 37 · Apr 1, 2013

2

Replies: 37

Views: 6K

Redshift FAQ article development

Mar 14, 2013 · Replies 142 · Mar 31, 2013

5

Replies: 142

Views: 19K

Is Inflation the Key to Understanding a Flat Universe?

Mar 28, 2013 · Replies 12 · Mar 31, 2013

Replies: 12

Views: 3K

How big was the Universe 13 billion years ago?

Feb 28, 2013 · Replies 41 · Mar 30, 2013

2

Replies: 41

Views: 11K

Energy has mass & therefore gravity. Yet dark energy is repulsive ?

Mar 23, 2013 · Replies 5 · Mar 29, 2013

Replies: 5

Views: 3K

How did the CMB Lorentz frame get chosen?

Mar 24, 2013 · Replies 5 · Mar 28, 2013

Replies: 5

Views: 3K

Does the boundary of the causal universe function as an event horizon?

Mar 25, 2013 · Replies 18 · Mar 27, 2013

Replies: 18

Views: 5K

Cosmological constant calculation

Mar 27, 2013 · Replies 5 · Mar 27, 2013

Replies: 5

Views: 3K

Higgs/vacuum stability and the universe

Mar 26, 2013 · Replies 2 · Mar 27, 2013

Replies: 2

Views: 2K

Definiton of Schwarzschild radius clarification request

Mar 26, 2013 · Replies 2 · Mar 27, 2013

Replies: 2

Views: 2K

How should I see the CMB picture

Mar 25, 2013 · Replies 3 · Mar 26, 2013

Replies: 3

Views: 2K

A Gravitational Entropy proposal from Ellis, Tavakol, and Clifton

Mar 25, 2013 · Replies 1 · Mar 26, 2013

Replies: 1

Views: 2K

Possible reason for dark energy (?)

Mar 24, 2013 · Replies 16 · Mar 26, 2013

Replies: 16

Views: 3K

What slowed or stopped inflation?

Mar 24, 2013 · Replies 15 · Mar 25, 2013

Replies: 15

Views: 3K

Article on New Planck Satellite data

Mar 22, 2013 · Replies 20 · Mar 25, 2013

Replies: 20

Views: 4K

Composition of the Universe can be Derived from PI?

Mar 22, 2013 · Replies 21 · Mar 25, 2013

Replies: 21

Views: 4K

Interesting facts about the Universe

Mar 24, 2013 · Replies 1 · Mar 24, 2013

Replies: 1

Views: 2K

A history of the universe using the new Planck numbers

Mar 24, 2013 · Replies 1 · Mar 24, 2013

Replies: 1

Views: 2K

Where in the universe am I absolutely still ?

Mar 22, 2013 · Replies 5 · Mar 22, 2013

Replies: 5

Views: 2K

Large Scale anomaly in Planck data

Mar 21, 2013 · Replies 11 · Mar 22, 2013

Replies: 11

Views: 4K

Is Wikipedia's Explanation of Olber's Paradox Misleading?

Mar 20, 2013 · Replies 14 · Mar 22, 2013

Replies: 14

Views: 4K

The Higgs mechanism and the Beginning of the Universe

Jul 23, 2012 · Replies 22 · Mar 22, 2013

Replies: 22

Views: 7K

Planck Mission Reveals Universe Features: String Theory Hits

Mar 22, 2013 · Replies 5 · Mar 22, 2013

Replies: 5

Views: 2K

Inflation of singularity at moment of evaporation?

Mar 16, 2013 · Replies 9 · Mar 21, 2013

Replies: 9

Views: 2K

What Exciting Discoveries Will the Live Planck Results Reveal?

Mar 20, 2013 · Replies 10 · Mar 21, 2013

Replies: 10

Views: 3K

Evolution of a star from a nebula

Mar 21, 2013 · Replies 1 · Mar 21, 2013

Replies: 1

Views: 2K

Is the universe large and finite, or infinite?

Mar 21, 2013 · Replies 2 · Mar 21, 2013

Replies: 2

Views: 2K

How can the universe be infinite, if it has a finite age?

Mar 21, 2013 · Replies 1 · Mar 21, 2013

Replies: 1

Views: 6K

What is a Vacuum in General Relativity?

Dec 28, 2012 · Replies 8 · Mar 20, 2013

Replies: 8

Views: 4K

Gravitation as answer to whether the Universe is infinite?

Mar 19, 2013 · Replies 3 · Mar 19, 2013

Replies: 3

Views: 2K

Interpreting Gravitational Lensing Images?

Mar 18, 2013 · Replies 2 · Mar 19, 2013

Replies: 2

Views: 2K

Is Dark Matter Absorbing Photons and Emitting Undetectable Radiation?

Mar 17, 2013 · Replies 3 · Mar 18, 2013

Replies: 3

Views: 2K

Differences between polarisations and temperature anisotropies in the

Mar 17, 2013 · Replies 1 · Mar 17, 2013

Replies: 1

Views: 2K

Looking for some good websites for Physics and Cosmology

Mar 15, 2013 · Replies 3 · Mar 17, 2013

Replies: 3

Views: 4K

Normal&good question about redshift

Mar 13, 2013 · Replies 8 · Mar 14, 2013

Replies: 8

Views: 3K

Could the universe just be a piece of something bigger?

Mar 12, 2013 · Replies 13 · Mar 14, 2013

Replies: 13

Views: 4K

Is dark energy or dark matter created to keep the Cosmological constant

Mar 11, 2013 · Replies 3 · Mar 13, 2013

Replies: 3

Views: 3K

Evidence of Dark Matter within the Solar System?

Mar 9, 2013 · Replies 30 · Mar 13, 2013

2

Replies: 30

Views: 6K

Gravitational Waves: Cosmic Inflation Equation

Mar 12, 2013 · Replies 11 · Mar 12, 2013

Replies: 11

Views: 3K

Is the big bang singularity really a rapid expansion of spacetime?

Mar 10, 2013 · Replies 11 · Mar 11, 2013

Replies: 11

Views: 3K

Rethinking Cosmology (Steinhardt)

Mar 1, 2013 · Replies 27 · Mar 11, 2013

Replies: 27

Views: 6K

Why are we crashing with Andromeda?

Feb 26, 2013 · Replies 20 · Mar 10, 2013

Replies: 20

Views: 4K

Dark Energy Confusion - Unraveling the Mystery

Mar 9, 2013 · Replies 12 · Mar 10, 2013

Replies: 12

Views: 3K

Poincaré recurrence and maximum entropy

Mar 9, 2013 · Replies 4 · Mar 10, 2013

Replies: 4

Views: 3K

When Will We Know If Planck Discovered B Mode Polarisation?

Mar 6, 2013 · Replies 9 · Mar 8, 2013

Replies: 9

Views: 3K

Largest structure in the universe discovered so far

Mar 6, 2013 · Replies 7 · Mar 7, 2013

Replies: 7

Views: 2K

Original location of the Big Bang

Jul 22, 2006 · Replies 42 · Mar 7, 2013

2

Replies: 42

Views: 26K

Why Isn't the Entire Universe a Black Hole Despite the Big Bang Singularity?

Feb 27, 2013 · Replies 28 · Mar 6, 2013

Replies: 28

Views: 7K

Would a Universe be considered part of the standard model?

Mar 5, 2013 · Replies 4 · Mar 5, 2013

Replies: 4

Views: 2K

Is Gravitational Energy Truly Negative in a Zero-Energy Universe?

Mar 5, 2013 · Replies 5 · Mar 5, 2013

Replies: 5

Views: 3K

Inflation, as a tool for supersymmetry breaking

Mar 5, 2013 · Replies 3 · Mar 5, 2013

Replies: 3

Views: 2K

Questions on observational cosmology

Mar 3, 2013 · Replies 3 · Mar 4, 2013

Replies: 3

Views: 2K

What is the source of dark energy?

Feb 17, 2013 · Replies 6 · Mar 3, 2013

Replies: 6

Views: 3K

Gravitino production in the early universe.

Mar 1, 2013 · Replies 1 · Mar 1, 2013

Replies: 1

Views: 2K

What are e-foldings and how are they used in various fields of study?

Feb 27, 2013 · Replies 3 · Feb 27, 2013

Replies: 3

Views: 20K

Time Magazine: Dark Matter May Not Exist At All

Feb 27, 2013 · Replies 3 · Feb 27, 2013

Replies: 3

Views: 3K

Accelerating Universe: Stephen Hawking, Carl Sagan, Arthur C. Clarke

Feb 21, 2013 · Replies 13 · Feb 24, 2013

Replies: 13

Views: 3K

Probability of stars in a multiverse

Feb 10, 2013 · Replies 61 · Feb 24, 2013

3

Replies: 61

Views: 11K

Is There Evidence for the Universe's Expansion and a Constant Speed of Light?

Feb 23, 2013 · Replies 3 · Feb 23, 2013

Replies: 3

Views: 3K

Does the Universe have a Frame Rate ?

Feb 21, 2013 · Replies 11 · Feb 22, 2013

Replies: 11

Views: 8K

Is there a limit to the universe's expansion?

Feb 20, 2013 · Replies 17 · Feb 21, 2013

Replies: 17

Views: 3K

Before Inflation: Elementary Particles Q&A

Feb 16, 2013 · Replies 17 · Feb 20, 2013

Replies: 17

Views: 5K

Easy steps to groom TabCosmo output for PF post format

Feb 19, 2013 · Replies 2 · Feb 19, 2013

Replies: 2

Views: 2K

Higgs Boson Particle: Doom for the Universe?

Feb 19, 2013 · Replies 3 · Feb 19, 2013

Replies: 3

Views: 2K

Age versus Size of the Universe

Feb 8, 2013 · Replies 40 · Feb 19, 2013

2

Replies: 40

Views: 6K

Inflaton after chaotic inflation

Feb 18, 2013 · Replies 4 · Feb 19, 2013

Replies: 4

Views: 2K

What Are the Largest Structures in Our Universe?

Feb 19, 2013 · Replies 1 · Feb 19, 2013

Replies: 1

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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