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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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The Universe: Finite or Infinite?

May 12, 2007 · Replies 179 · Nov 23, 2010

6

Replies: 179

Views: 67K

Can Black Holes Dance Around Each Other Without Merging?

Oct 19, 2010 · Replies 17 · Nov 23, 2010

Replies: 17

Views: 4K

Our solar system's proximity to other ones

Nov 16, 2010 · Replies 9 · Nov 23, 2010

Replies: 9

Views: 3K

String stars instead of black holes?

Nov 22, 2010 · Replies 4 · Nov 23, 2010

Replies: 4

Views: 2K

Does the entire universe have a survival instinct?

Nov 17, 2010 · Replies 39 · Nov 23, 2010

2

Replies: 39

Views: 9K

Poll

Unraveling the Mystery of Quasars: Are They Really Dying Out?

Nov 20, 2010 · Replies 2 · Nov 22, 2010

Replies: 2

Views: 3K

Is Our Perception of the Universe Just a Black Box?

Oct 21, 2010 · Replies 107 · Nov 22, 2010

4

Replies: 107

Views: 15K

Origin of Cosmic Rays: Intensity Explained

Nov 11, 2010 · Replies 5 · Nov 21, 2010

Replies: 5

Views: 2K

How does GR slow a homogeneous universe?

Nov 17, 2010 · Replies 13 · Nov 19, 2010

Replies: 13

Views: 4K

Does the universe have zero total energy?

Nov 17, 2010 · Replies 3 · Nov 18, 2010

Replies: 3

Views: 5K

Is this equation I made correct?

Nov 17, 2010 · Replies 4 · Nov 18, 2010

Replies: 4

Views: 2K

Is gravity really a force of universal attraction?

Oct 28, 2010 · Replies 15 · Nov 18, 2010

Replies: 15

Views: 4K

Alien life forms, do they exist?

Nov 6, 2010 · Replies 42 · Nov 16, 2010

2

Replies: 42

Views: 9K

A burning question from a random thinker

Nov 13, 2010 · Replies 11 · Nov 16, 2010

Replies: 11

Views: 3K

A question on Gravity Waves and Gravity Radiation

Nov 11, 2010 · Replies 3 · Nov 16, 2010

Replies: 3

Views: 5K

New Dark Matter Map Solving Galactic Puzzle?

Nov 15, 2010 · Replies 1 · Nov 16, 2010

Replies: 1

Views: 2K

Relativistic mass and Hubble constant

Nov 9, 2010 · Replies 11 · Nov 12, 2010

Replies: 11

Views: 3K

The Ultra-mega-macrostructure of the Universe

Nov 11, 2010 · Replies 2 · Nov 11, 2010

Replies: 2

Views: 3K

Where Can I Find Raw Data for Galactic Curve Velocities?

Nov 5, 2010 · Replies 3 · Nov 11, 2010

Replies: 3

Views: 3K

Accelerating universe - details and dispute

Nov 10, 2010 · Replies 4 · Nov 11, 2010

Replies: 4

Views: 3K

Two separate barycenters of a binary system in a small closed universe?

Nov 9, 2010 · Replies 2 · Nov 11, 2010

Replies: 2

Views: 3K

Simply connected vs. non-simply connected

Nov 3, 2010 · Replies 3 · Nov 10, 2010

Replies: 3

Views: 4K

Is the future of Cosmology limitless or are we bound by fundamental questions?

Nov 9, 2010 · Replies 3 · Nov 10, 2010

Replies: 3

Views: 2K

What is the Egg Shell Theory of the Universe and its implications?

Oct 31, 2010 · Replies 4 · Nov 10, 2010

Replies: 4

Views: 3K

Could Dark Mass Be a Possible Explanation for Missing Particles in the Universe?

Oct 17, 2010 · Replies 68 · Nov 10, 2010

3

Replies: 68

Views: 12K

Living between the Galaxies (Dark Energy)

Nov 5, 2010 · Replies 12 · Nov 9, 2010

Replies: 12

Views: 4K

Why is the vacuum flat, i.e., Euclidean?

Nov 5, 2010 · Replies 17 · Nov 9, 2010

Replies: 17

Views: 4K

What Lies Beyond Our Observable Universe?

Oct 29, 2010 · Replies 2 · Nov 8, 2010

Replies: 2

Views: 4K

Hubble's Law And A Question Of Time

Oct 31, 2010 · Replies 2 · Nov 8, 2010

Replies: 2

Views: 3K

What is the Shape of the Universe?

Nov 7, 2010 · Replies 2 · Nov 8, 2010

Replies: 2

Views: 4K

Fine-tuned Universe for life = God

Oct 18, 2010 · Replies 22 · Nov 7, 2010

Replies: 22

Views: 6K

Eventual decay of all matter - question from an amateur

Nov 6, 2010 · Replies 6 · Nov 7, 2010

Replies: 6

Views: 15K

Could this explain how evaporation of matter occurs in the universe?

Jul 20, 2008 · Replies 33 · Nov 7, 2010

2

Replies: 33

Views: 7K

Are the universe and time abstract concepts?

Oct 31, 2010 · Replies 8 · Nov 6, 2010

Replies: 8

Views: 14K

Expanding Universe or Expanding Space?

Oct 26, 2010 · Replies 21 · Nov 5, 2010

Replies: 21

Views: 11K

What Existed Before the Big Bang?

Nov 1, 2010 · Replies 10 · Nov 3, 2010

Replies: 10

Views: 3K

Questioning the cosmological principle

Oct 22, 2010 · Replies 82 · Nov 3, 2010

3

Replies: 82

Views: 14K

Question about the universe structure?

Oct 31, 2010 · Replies 10 · Nov 3, 2010

Replies: 10

Views: 3K

What Is the Energy Associated with Dark Matter WIMP Particles?

Nov 1, 2010 · Replies 4 · Nov 2, 2010

Replies: 4

Views: 2K

What is the velocity and direction of the CMB dipole?

Oct 31, 2010 · Replies 2 · Nov 1, 2010

Replies: 2

Views: 4K

CMB or nucleosynthesis as empirical tests of gravitation by radiation?

Oct 27, 2010 · Replies 5 · Oct 29, 2010

Replies: 5

Views: 3K

If the universe is flat and finite?

Aug 15, 2010 · Replies 13 · Oct 29, 2010

Replies: 13

Views: 6K

Does an Infinite Universe Include All Gods and Goddesses?

Oct 25, 2010 · Replies 3 · Oct 28, 2010

Replies: 3

Views: 3K

Can a universe exist without matter?

Oct 25, 2010 · Replies 5 · Oct 27, 2010

Replies: 5

Views: 3K

Understanding Orbital Mechanics: The Force Behind Planetary Motion

Oct 21, 2010 · Replies 15 · Oct 27, 2010

Replies: 15

Views: 4K

Age of Universe: 14B Years - True or Assumption?

Oct 24, 2010 · Replies 7 · Oct 25, 2010

Replies: 7

Views: 3K

What is the chemical makeup of stars and how does it affect their lifespan?

Oct 23, 2010 · Replies 7 · Oct 24, 2010

Replies: 7

Views: 3K

Another large scale structure of the universe idea

Oct 20, 2010 · Replies 4 · Oct 24, 2010

Replies: 4

Views: 3K

Inflation Theory: Matter-Antimatter Annihilation Concept

Oct 22, 2010 · Replies 5 · Oct 23, 2010

Replies: 5

Views: 3K

Galaxy at redshift z=8.6 (the actual paper)

Oct 21, 2010 · Replies 1 · Oct 22, 2010

Replies: 1

Views: 3K

How Is the Distance to the CMB Measured and How Does It Relate to Its Structure?

Oct 21, 2010 · Replies 2 · Oct 22, 2010

Replies: 2

Views: 2K

Does the universe need an escape velocity?

Jan 26, 2006 · Replies 12 · Oct 21, 2010

Replies: 12

Views: 8K

How Do Critical Density and CMB Irregularities Explain the Universe's Shape?

Oct 21, 2010 · Replies 2 · Oct 21, 2010

Replies: 2

Views: 2K

CERN scientists eye parallel universe breakthrough

Oct 21, 2010 · Replies 2 · Oct 21, 2010

Replies: 2

Views: 3K

Superstring Cosmology: Compactifying 7 Dimensions

Oct 7, 2010 · Replies 5 · Oct 20, 2010

Replies: 5

Views: 3K

How do I normalize the likelihood distribution?

Oct 18, 2010 · Replies 8 · Oct 20, 2010

Replies: 8

Views: 5K

Is the Big Bang Theory Debunked?

Dec 28, 2004 · Replies 55 · Oct 20, 2010

2

Replies: 55

Views: 20K

Are Wormholes the Key to Unlocking the Universe's Secrets?

Oct 18, 2010 · Replies 6 · Oct 20, 2010

Replies: 6

Views: 4K

Could Dark Energy be Caused by a Slow Shift in the Base State?

Oct 19, 2010 · Replies 3 · Oct 20, 2010

Replies: 3

Views: 2K

Inflation and initial conditions

Oct 19, 2010 · Replies 2 · Oct 20, 2010

Replies: 2

Views: 2K

Dark matter and keplerian revolution

Oct 15, 2010 · Replies 19 · Oct 18, 2010

Replies: 19

Views: 3K

The Grand Design - Stephen Hawking and Leonard Mlodinow

Oct 17, 2010 · Replies 5 · Oct 17, 2010

Replies: 5

Views: 3K

From physics how can we figure out how old the earth and the universe is?

Oct 11, 2010 · Replies 7 · Oct 16, 2010

Replies: 7

Views: 2K

Can a "Dead Universe" be Revived?

Oct 15, 2010 · Replies 8 · Oct 16, 2010

Replies: 8

Views: 3K

How is the Final Velocity of Star Movements Calculated?

Oct 15, 2010 · Replies 1 · Oct 16, 2010

Replies: 1

Views: 2K

Can FLRW metric be taken to describe stretching in time rather than space?

Oct 13, 2010 · Replies 2 · Oct 14, 2010

Replies: 2

Views: 2K

Quasar Alignment to Cosmic Strings

Oct 12, 2010 · Replies 5 · Oct 13, 2010

Replies: 5

Views: 4K

Expanding Present Time Universe at Omega 0 = 1: Help Needed

Oct 8, 2010 · Replies 8 · Oct 13, 2010

Replies: 8

Views: 2K

What caused the expansion of the universe for the 1st 7 billion years?

Oct 11, 2010 · Replies 10 · Oct 13, 2010

Replies: 10

Views: 4K

What is the relationship between mathematical structures and real existence?

Oct 11, 2010 · Replies 8 · Oct 13, 2010

Replies: 8

Views: 4K

Is the Expansion of the Universe Driven by Mass?

Mar 28, 2007 · Replies 22 · Oct 12, 2010

Replies: 22

Views: 8K

Cosmological Constant: Dark Energy vs Gravity Ratio

Sep 26, 2010 · Replies 18 · Oct 11, 2010

Replies: 18

Views: 5K

Are Distant Globular Clusters the Key to Testing Newtonian Gravity?

Oct 8, 2010 · Replies 19 · Oct 11, 2010

Replies: 19

Views: 3K

If Big Crunch = True, then Reincarnation = True?

Oct 10, 2010 · Replies 18 · Oct 11, 2010

Replies: 18

Views: 11K

Origin of Dark Energy: Before the Big Bang

Oct 10, 2010 · Replies 7 · Oct 11, 2010

Replies: 7

Views: 2K

How many methods for dating a galaxy

Oct 10, 2010 · Replies 1 · Oct 10, 2010

Replies: 1

Views: 2K

Was the Universe Really Chaotic Right After the Big Bang?

Sep 8, 2010 · Replies 15 · Oct 10, 2010

Replies: 15

Views: 5K

Explore the Possibility of Other Universes with Hawking's "The Grand Design

Sep 19, 2010 · Replies 11 · Oct 8, 2010

Replies: 11

Views: 3K

Was the Moon Ever Touching Earth Billions of Years Ago?

Oct 7, 2010 · Replies 10 · Oct 8, 2010

Replies: 10

Views: 6K

Dark Energy, Light, the Universe, and Black Holes

Jan 29, 2009 · Replies 4 · Oct 8, 2010

Replies: 4

Views: 3K

Some questions about energy conservation

Oct 7, 2010 · Replies 2 · Oct 7, 2010

Replies: 2

Views: 2K

Why Doesn't Light from the Big Bang Get Stretched Out?

Oct 5, 2010 · Replies 10 · Oct 7, 2010

Replies: 10

Views: 3K

Will the Planck Satellite Illuminate Loop Quantum Cosmology Insights?

Oct 6, 2010 · Replies 7 · Oct 7, 2010

Replies: 7

Views: 3K

Theory of the end of the universe

Oct 6, 2010 · Replies 2 · Oct 6, 2010

Replies: 2

Views: 2K

Exploring Primordial Universe w/ QUBIC: 400 Horns at 100 mK in Antarctica

Oct 4, 2010 · Replies 2 · Oct 6, 2010

Replies: 2

Views: 2K

Is the Universe Analogous to Water with Entropy and Symmetry?

Oct 1, 2010 · Replies 6 · Oct 5, 2010

Replies: 6

Views: 3K

Understanding Radiation Pressure and Its Role in Star Dynamics

Oct 4, 2010 · Replies 4 · Oct 5, 2010

Replies: 4

Views: 3K

Could Dark Energy Be Linked to a Primordial Mother-Universe?

Oct 4, 2010 · Replies 5 · Oct 5, 2010

Replies: 5

Views: 2K

What made the universe have 3 dimensions, instead of some other number?

Sep 19, 2010 · Replies 42 · Oct 4, 2010

2

Replies: 42

Views: 11K

Variation of fine structure constant and spacetime?

Oct 3, 2010 · Replies 2 · Oct 4, 2010

Replies: 2

Views: 2K

Size of the universe and human brain

Jul 29, 2010 · Replies 6 · Oct 3, 2010

Replies: 6

Views: 3K

Eternal Inflation Time Will End

Oct 1, 2010 · Replies 5 · Oct 2, 2010

Replies: 5

Views: 3K

How are clusters of galaxies formed?

Oct 2, 2010 · Replies 1 · Oct 2, 2010

Replies: 1

Views: 2K

Is the Cosmological Principle Limited to Space Only?

Sep 22, 2010 · Replies 136 · Oct 1, 2010

5

Replies: 136

Views: 23K

What is the relationship between spacetime and energy?

Sep 23, 2010 · Replies 4 · Oct 1, 2010

Replies: 4

Views: 3K

Particles in our universe undetectable by us

Sep 10, 2010 · Replies 3 · Oct 1, 2010

Replies: 3

Views: 3K

Is the Standard Model of Cosmology built on a house of cards?

Sep 16, 2010 · Replies 26 · Sep 30, 2010

Replies: 26

Views: 5K

Can the Li7 problem be resolved by increasing the dark matter ratio?

Sep 27, 2010 · Replies 3 · Sep 29, 2010

Replies: 3

Views: 2K

How Does B Mode Polarization Help Trace Gravitational Radiation?

Sep 22, 2010 · Replies 5 · Sep 27, 2010

Replies: 5

Views: 9K

About the origin of the universe? big bang cause?

Sep 23, 2010 · Replies 12 · Sep 27, 2010

Replies: 12

Views: 4K

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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