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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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Inflation as a solution to the Early Universe Enrtopy problem

Dec 14, 2012 · Replies 12 · Dec 18, 2012

Replies: 12

Views: 4K

Emergent Gravity: Padmanabhan's Brilliant or Misguided Paper

Jul 4, 2012 · Replies 28 · Dec 18, 2012

Replies: 28

Views: 10K

Radio Transmission Power and Detection in Relation to Alien Communication

Dec 8, 2012 · Replies 15 · Dec 17, 2012

Replies: 15

Views: 3K

What is the difference between the Big Bang and the exact same energy mass

Dec 15, 2012 · Replies 12 · Dec 17, 2012

Replies: 12

Views: 4K

Redshift / blueshift of light in a gravity well

Dec 12, 2012 · Replies 17 · Dec 17, 2012

Replies: 17

Views: 5K

Big Bounce and varying constants

Dec 11, 2012 · Replies 2 · Dec 12, 2012

Replies: 2

Views: 2K

Questions on dark matter and dark energy

Dec 10, 2012 · Replies 4 · Dec 11, 2012

Replies: 4

Views: 4K

If the Universe is indeed finite(in volume)

Dec 10, 2012 · Replies 8 · Dec 11, 2012

Replies: 8

Views: 3K

Planck 2013 Conference: April 2-5

Dec 10, 2012 · Replies 3 · Dec 11, 2012

Replies: 3

Views: 3K

What Is the First Acoustic Peak in CMB?

Feb 23, 2011 · Replies 5 · Dec 10, 2012

Replies: 5

Views: 13K

Is the following creation description useful?

Dec 8, 2012 · Replies 10 · Dec 9, 2012

Replies: 10

Views: 3K

What Other Evidence Supports the Idea of an Expanding Universe Besides Redshift?

Dec 6, 2012 · Replies 23 · Dec 9, 2012

Replies: 23

Views: 5K

Big Bang Vs Inflationary Big Bang

Dec 7, 2012 · Replies 5 · Dec 8, 2012

Replies: 5

Views: 4K

Dark matter/Energy not needed alternative

Dec 7, 2012 · Replies 3 · Dec 7, 2012

Replies: 3

Views: 2K

Universe Expansion: What Am I Missing?

Mar 29, 2012 · Replies 31 · Dec 5, 2012

2

Replies: 31

Views: 10K

Universe Expansion: is it really expanding?

Dec 3, 2012 · Replies 10 · Dec 5, 2012

Replies: 10

Views: 4K

What Is the Difference Between Dusty and Dust-Laden Plasma?

Dec 4, 2012 · Replies 2 · Dec 5, 2012

Replies: 2

Views: 2K

What Holds the Universe Together?

Dec 4, 2012 · Replies 2 · Dec 4, 2012

Replies: 2

Views: 2K

Need help on my understanding of gravitational waves

Dec 3, 2012 · Replies 2 · Dec 3, 2012

Replies: 2

Views: 2K

Effect of negative gravity on time

Dec 3, 2012 · Replies 7 · Dec 3, 2012

Replies: 7

Views: 3K

Spacetime Quantization and the Relationship between Energy and Frequency

Dec 1, 2012 · Replies 2 · Dec 3, 2012

Replies: 2

Views: 2K

NORDITA , anything interesting?

Nov 29, 2012 · Replies 3 · Dec 1, 2012

Replies: 3

Views: 2K

Spacetime line element to describe an expanding cube

Nov 24, 2012 · Replies 6 · Nov 30, 2012

Replies: 6

Views: 3K

Is our universe actually contained within a black hole?

Jun 30, 2012 · Replies 8 · Nov 29, 2012

Replies: 8

Views: 3K

Question on Cosmological Constant paper

Nov 29, 2012 · Replies 2 · Nov 29, 2012

Replies: 2

Views: 2K

Cosmic Timeline: A Comprehensive SF History

Nov 27, 2012 · Replies 4 · Nov 28, 2012

Replies: 4

Views: 3K

How to determine elements based on received frequency from Space?

Nov 27, 2012 · Replies 4 · Nov 28, 2012

Replies: 4

Views: 2K

Are Cosmic Asymmetries Challenging the Cosmological Principle?

Nov 27, 2012 · Replies 6 · Nov 28, 2012

Replies: 6

Views: 3K

Are SN 1a light curves evidence of universal expansion?

Nov 27, 2012 · Replies 5 · Nov 27, 2012

Replies: 5

Views: 2K

View of universe from event horizon of black hole

Nov 18, 2012 · Replies 11 · Nov 27, 2012

Replies: 11

Views: 4K

Which Authors Offer Recent Insights on Space/Time?

Nov 27, 2012 · Replies 5 · Nov 27, 2012

Replies: 5

Views: 2K

The 'fermi Line' (the 130 GEv gamma ray signal)

Nov 26, 2012 · Replies 4 · Nov 27, 2012

Replies: 4

Views: 2K

Questions on the Inflation Debate

Nov 24, 2012 · Replies 9 · Nov 26, 2012

Replies: 9

Views: 4K

The size of the universe at the big bang?

Nov 21, 2012 · Replies 20 · Nov 24, 2012

Replies: 20

Views: 7K

Singularity and size of universe

Nov 14, 2012 · Replies 5 · Nov 24, 2012

Replies: 5

Views: 3K

Big Bang Matter-Antimatter Annihilation

Mar 12, 2007 · Replies 29 · Nov 24, 2012

Replies: 29

Views: 15K

Inconsequence in Lawrence Krauss lecture

Nov 23, 2012 · Replies 4 · Nov 24, 2012

Replies: 4

Views: 2K

Intuitively - why aren't black holes hot?

Aug 29, 2012 · Replies 41 · Nov 24, 2012

2

Replies: 41

Views: 12K

No Inflation in Brane Cosmology: Is Dark Energy the Driver?

Nov 22, 2012 · Replies 5 · Nov 23, 2012

Replies: 5

Views: 3K

Where Can I Find Reliable Information on Dark Flow?

Nov 22, 2012 · Replies 7 · Nov 23, 2012

Replies: 7

Views: 3K

Unleashing the Power of the Universe: The Mystery of Universal Energy

Nov 20, 2012 · Replies 32 · Nov 21, 2012

2

Replies: 32

Views: 6K

Are static models totally static?

Nov 21, 2012 · Replies 6 · Nov 21, 2012

Replies: 6

Views: 2K

Where does dark energy come from

Nov 21, 2012 · Replies 1 · Nov 21, 2012

Replies: 1

Views: 3K

Luminosity Distance, Determination From Type Ia SN

Nov 14, 2012 · Replies 20 · Nov 21, 2012

Replies: 20

Views: 6K

How Can One Reach Outside of Time and Space?

Nov 19, 2012 · Replies 7 · Nov 20, 2012

Replies: 7

Views: 3K

Location of Earth in the Universe

Nov 15, 2012 · Replies 10 · Nov 20, 2012

Replies: 10

Views: 4K

What Is It Like at the Edge of the Universe?

Oct 14, 2012 · Replies 25 · Nov 19, 2012

Replies: 25

Views: 13K

Hey, I was reading Neil Turok's book (The Universe Within) and it got

Nov 18, 2012 · Replies 1 · Nov 18, 2012

Replies: 1

Views: 2K

Quasar Mass-Luminosity, High Mass Turnoff Evolution and a Synchronization Puzzle

Nov 15, 2012 · Replies 7 · Nov 17, 2012

Replies: 7

Views: 3K

Big Bang Singularity: What is it?

Nov 16, 2012 · Replies 9 · Nov 17, 2012

Replies: 9

Views: 3K

Observable universe and events between vast distances

Nov 14, 2012 · Replies 9 · Nov 15, 2012

Replies: 9

Views: 3K

You always hear people say that the universe is made of matter and energy

Nov 13, 2012 · Replies 2 · Nov 13, 2012

Replies: 2

Views: 3K

Measuring the Distance Between First & Last Particles of the Big Bang

Nov 12, 2012 · Replies 1 · Nov 13, 2012

Replies: 1

Views: 2K

Recent papers relevant to cosmology that seemed extra interesting

Nov 11, 2012 · Replies 1 · Nov 13, 2012

Replies: 1

Views: 3K

What Is the Nature of the Space Left Behind After the Big Bang?

Nov 12, 2012 · Replies 4 · Nov 12, 2012

Replies: 4

Views: 3K

An amusing paper about the size of the Universe

Nov 10, 2012 · Replies 20 · Nov 11, 2012

Replies: 20

Views: 6K

Correct interpretation of terms in proper velocity expression?

Nov 10, 2012 · Replies 4 · Nov 10, 2012

Replies: 4

Views: 3K

Measurment that proves that the universe is flat

Nov 6, 2012 · Replies 8 · Nov 8, 2012

Replies: 8

Views: 3K

Expansion of Universe but no expansion of galaxies

Oct 31, 2012 · Replies 14 · Nov 8, 2012

Replies: 14

Views: 5K

Are there non-spherical blackholes?

Nov 7, 2012 · Replies 4 · Nov 8, 2012

Replies: 4

Views: 2K

Is the speed of light constant for a co-moving observer?

Oct 30, 2012 · Replies 14 · Nov 7, 2012

Replies: 14

Views: 5K

Heat of the Big Bang: Understanding CMB & Accuracy

Nov 1, 2012 · Replies 9 · Nov 6, 2012

Replies: 9

Views: 4K

Is age of universe adjusted for gravity?

Nov 5, 2012 · Replies 6 · Nov 6, 2012

Replies: 6

Views: 3K

Does energy dilate time like mass?

Nov 5, 2012 · Replies 1 · Nov 5, 2012

Replies: 1

Views: 2K

Problem interpreting Mpc/h in maps of DM

Nov 4, 2012 · Replies 3 · Nov 5, 2012

Replies: 3

Views: 4K

Fundamental Cosmology conference (Stockholm, November 2012)

Nov 2, 2012 · Replies 0 · Nov 2, 2012

Replies: 0

Views: 2K

How can the Universe be flat and accelerating in its expansion?

Oct 30, 2012 · Replies 2 · Oct 30, 2012

Replies: 2

Views: 4K

What is the age of the universe in billions?

Oct 29, 2012 · Replies 9 · Oct 29, 2012

Replies: 9

Views: 3K

Another nail in the coffin of alternative redshift theories

Oct 25, 2012 · Replies 8 · Oct 29, 2012

Replies: 8

Views: 6K

Is My Proper Time the Same as Cosmological or Conformal Time?

Oct 27, 2012 · Replies 2 · Oct 28, 2012

Replies: 2

Views: 3K

Looking for other proof of expanding universe.

Oct 15, 2012 · Replies 75 · Oct 27, 2012

3

Replies: 75

Views: 16K

Is Heat Death or the Big Rip Inevitable in an Open Universe?

Oct 5, 2012 · Replies 20 · Oct 27, 2012

Replies: 20

Views: 10K

Big Bang Questions: How Far, How Long, Possible?

Oct 24, 2012 · Replies 3 · Oct 25, 2012

Replies: 3

Views: 3K

Energy in co-moving co-ordinates?

Oct 20, 2012 · Replies 7 · Oct 25, 2012

Replies: 7

Views: 3K

Difference between the Higgs field and the Inflaton field?

Oct 22, 2012 · Replies 7 · Oct 24, 2012

Replies: 7

Views: 5K

I'm sure this has been asked before, but: Universes colliding with each other

Oct 23, 2012 · Replies 16 · Oct 23, 2012

Replies: 16

Views: 3K

Cosmological constant from first principles

Oct 18, 2012 · Replies 9 · Oct 21, 2012

Replies: 9

Views: 4K

Consequences of a negative mass universe

Oct 19, 2012 · Replies 5 · Oct 20, 2012

Replies: 5

Views: 4K

Determining Mass/Density of Universe: How Accurate?

Oct 16, 2012 · Replies 10 · Oct 20, 2012

Replies: 10

Views: 3K

Observable Universe and Black Holes

Oct 18, 2012 · Replies 3 · Oct 18, 2012

Replies: 3

Views: 3K

The universe and its matters: finite or infinite?

Oct 17, 2012 · Replies 6 · Oct 18, 2012

Replies: 6

Views: 4K

Evidence of Cosmic Backround Radiation cooling

Oct 17, 2012 · Replies 5 · Oct 18, 2012

Replies: 5

Views: 2K

Simple argument for a linear cosmology

Oct 16, 2012 · Replies 10 · Oct 18, 2012

Replies: 10

Views: 4K

Dark Matter as possible ground state for all matter

Oct 17, 2012 · Replies 2 · Oct 18, 2012

Replies: 2

Views: 2K

Why does our universe/dimension follow the laws that it does?

Oct 18, 2012 · Replies 2 · Oct 18, 2012

Replies: 2

Views: 2K

Co-moving density should be constant?

Oct 14, 2012 · Replies 14 · Oct 16, 2012

Replies: 14

Views: 4K

Perfect cosmological principle in co-moving co-ordinates

Oct 10, 2012 · Replies 4 · Oct 16, 2012

Replies: 4

Views: 3K

Many Worlds + Anthropic Principle

Oct 11, 2012 · Replies 21 · Oct 15, 2012

Replies: 21

Views: 7K

A question about our prodominently matter universe.

Oct 15, 2012 · Replies 1 · Oct 15, 2012

Replies: 1

Views: 2K

Does the Milky have a QSO? What is the observational evidence concerning QSOs?

Aug 10, 2012 · Replies 24 · Oct 14, 2012

Replies: 24

Views: 6K

Universe was the size of our solar system after 1 sec

Oct 11, 2012 · Replies 15 · Oct 14, 2012

Replies: 15

Views: 4K

Red Shift: Questions About Light & Big Bang

Oct 12, 2012 · Replies 2 · Oct 14, 2012

Replies: 2

Views: 2K

Is the Expansion of the Universe Slowing Down?

Oct 7, 2012 · Replies 15 · Oct 14, 2012

Replies: 15

Views: 7K

Oldest most distant Galaxy discovered to date

Oct 8, 2012 · Replies 24 · Oct 13, 2012

Replies: 24

Views: 5K

Big Bang inflation/expansion vs centre of universe vs Speed of light query

Oct 8, 2012 · Replies 28 · Oct 12, 2012

Replies: 28

Views: 7K

Why is the Universe So Complex and What Should I Do About My Existential Crisis?

Oct 12, 2012 · Replies 1 · Oct 12, 2012

Replies: 1

Views: 2K

Origin of Matter: Theory Explaining Creation

Nov 30, 2003 · Replies 66 · Oct 11, 2012

3

Replies: 66

Views: 34K

What does it mean that time is expanding?

Oct 8, 2012 · Replies 10 · Oct 11, 2012

Replies: 10

Views: 4K

Is the Expansion of the Universe a Fact or a Possibility?

Oct 9, 2012 · Replies 9 · Oct 10, 2012

Replies: 9

Views: 3K

Is Spacetime Capable of Tearing or Breaking Down?

Oct 9, 2012 · Replies 3 · Oct 10, 2012

Replies: 3

Views: 9K

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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