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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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What evidence supports the validity of the Big Bang theory?

Dec 8, 2011 · Replies 44 · Aug 22, 2013

2

Replies: 44

Views: 15K

Matter ingestion rate of blackholes

Aug 18, 2013 · Replies 3 · Aug 22, 2013

Replies: 3

Views: 2K

A question relating to expansion rate of the Universe

Aug 16, 2013 · Replies 31 · Aug 21, 2013

2

Replies: 31

Views: 5K

Compact 3-manifolds of Negative Curvature

Aug 20, 2013 · Replies 2 · Aug 21, 2013

Replies: 2

Views: 2K

Holographic principle, mathematical universe & dimensional reduction

Aug 20, 2013 · Replies 1 · Aug 21, 2013

Replies: 1

Views: 2K

What is the Scale of the Universe?

Aug 16, 2013 · Replies 2 · Aug 17, 2013

Replies: 2

Views: 2K

What is the definition of cosmology in a physics context?

Aug 12, 2013 · Replies 7 · Aug 17, 2013

Replies: 7

Views: 3K

How and how much does is the cosmological red shift affected?

Aug 15, 2013 · Replies 2 · Aug 15, 2013

Replies: 2

Views: 2K

Higgs-driven cyclic conformal cosmology (Steinhardt Turok Bars)

Jul 8, 2013 · Replies 14 · Aug 15, 2013

Replies: 14

Views: 5K

Hydrodynamical description of photons

Aug 13, 2013 · Replies 12 · Aug 15, 2013

Replies: 12

Views: 3K

Suppose space comes into existence

Aug 14, 2013 · Replies 1 · Aug 14, 2013

Replies: 1

Views: 2K

Size of all things in the universe

Aug 12, 2013 · Replies 24 · Aug 13, 2013

Replies: 24

Views: 4K

Is a Dynamic Dark Information Energy Consistent with Planck Data?

Aug 13, 2013 · Replies 1 · Aug 13, 2013

Replies: 1

Views: 2K

How can we 'see' back to the early universe?

Aug 8, 2013 · Replies 18 · Aug 9, 2013

Replies: 18

Views: 5K

Relativistic Effects of a Black Hole

Jul 11, 2013 · Replies 19 · Aug 8, 2013

Replies: 19

Views: 5K

Cosmological Redshift Question

Aug 3, 2013 · Replies 21 · Aug 8, 2013

Replies: 21

Views: 5K

Spatial dimensions of our universe

Aug 8, 2013 · Replies 3 · Aug 8, 2013

Replies: 3

Views: 2K

What Are the Flaws in Personal Theories About the Big Bang and the Multiverse?

Aug 8, 2013 · Replies 1 · Aug 8, 2013

Replies: 1

Views: 2K

If a strong gravitational wave hit Earth would clocks record it?

Aug 2, 2013 · Replies 27 · Aug 8, 2013

Replies: 27

Views: 5K

Why the discrepancy between telescopes and big bang?

Aug 4, 2013 · Replies 12 · Aug 7, 2013

Replies: 12

Views: 3K

Kilonovas caused by black hole neutron star mergers

Aug 4, 2013 · Replies 5 · Aug 6, 2013

Replies: 5

Views: 2K

Idea about Mars atmospheric loss

Aug 6, 2013 · Replies 1 · Aug 6, 2013

Replies: 1

Views: 2K

What is the role of dark energy in the potential occurrence of a Big Crunch?

Aug 5, 2013 · Replies 15 · Aug 5, 2013

Replies: 15

Views: 4K

Hawking's Position on Repeating Big Bang

Aug 2, 2013 · Replies 4 · Aug 3, 2013

Replies: 4

Views: 3K

Seriously gritty videojournalism applied to cosmology by Skydive

Aug 3, 2013 · Replies 4 · Aug 3, 2013

Replies: 4

Views: 2K

How is the Universe Expanding?

Jun 20, 2013 · Replies 3 · Aug 2, 2013

Replies: 3

Views: 3K

Measuring Redshift to Support Accelerating Universe

Jul 29, 2013 · Replies 33 · Aug 2, 2013

2

Replies: 33

Views: 6K

Can the Many Worlds Theory and Biocentric Theory Co-Exist?

Jul 30, 2013 · Replies 16 · Aug 1, 2013

Replies: 16

Views: 3K

Force of Gravity in a 2 Dimensional Universe

Jul 30, 2013 · Replies 2 · Jul 31, 2013

Replies: 2

Views: 2K

Is it certain that CMBR originates from the 5% of ordinary matter?

Jul 26, 2013 · Replies 31 · Jul 30, 2013

2

Replies: 31

Views: 6K

How to calculate mass of closed Universe?

Jul 29, 2013 · Replies 5 · Jul 29, 2013

Replies: 5

Views: 2K

Dark energy acceleration of space effect on red shift

Jul 16, 2013 · Replies 22 · Jul 29, 2013

Replies: 22

Views: 5K

Need help to start with Healpix on IDL and Windows 7

Jul 14, 2013 · Replies 9 · Jul 29, 2013

Replies: 9

Views: 4K

Inflation Deflated ? the dead of inlation models ?

Jul 28, 2013 · Replies 2 · Jul 29, 2013

Replies: 2

Views: 2K

Various varieties of black holes

Jul 1, 2013 · Replies 10 · Jul 25, 2013

Replies: 10

Views: 3K

Define and measure inhomogenities and anisotropies

Jul 23, 2013 · Replies 14 · Jul 24, 2013

Replies: 14

Views: 3K

Is the universe eternal and cyclic? Evidence from the CMB

Feb 6, 2013 · Replies 8 · Jul 23, 2013

Replies: 8

Views: 7K

Meissner sees Penrose-type circles in Planck CMB map

Jul 22, 2013 · Replies 7 · Jul 23, 2013

Replies: 7

Views: 4K

Is Conformal Cyclic Cosmology a Viable Explanation for the Big Bang?

Jul 16, 2013 · Replies 4 · Jul 23, 2013

Replies: 4

Views: 4K

Mechanical Energy - Self energy of Universe

Jul 21, 2013 · Replies 7 · Jul 23, 2013

Replies: 7

Views: 2K

Is there a centre to the universe

May 6, 2011 · Replies 37 · Jul 22, 2013

2

Replies: 37

Views: 10K

Randomness and the life cycle of events of our Universe

Jul 17, 2013 · Replies 18 · Jul 19, 2013

Replies: 18

Views: 3K

Is the Universe spinning on a vast scale?

Jul 15, 2013 · Replies 24 · Jul 18, 2013

Replies: 24

Views: 5K

Is the Big Bang a theory or a hypothesis?

Jul 14, 2013 · Replies 8 · Jul 17, 2013

Replies: 8

Views: 8K

Is the Universe Truly Expanding? Examining the Paradox of Infinite Expansion

Jul 16, 2013 · Replies 3 · Jul 17, 2013

Replies: 3

Views: 2K

Mass/Energy Creation and Conservation

Jul 16, 2013 · Replies 8 · Jul 16, 2013

Replies: 8

Views: 2K

Nature of Primodial Existance before bigbang

Jul 15, 2013 · Replies 4 · Jul 16, 2013

Replies: 4

Views: 2K

Could a Black Hole Explain the Big Bang & CMB?

Jul 14, 2013 · Replies 6 · Jul 14, 2013

Replies: 6

Views: 3K

The solar system 90 degrees to milky way

Jul 5, 2013 · Replies 8 · Jul 13, 2013

Replies: 8

Views: 13K

How Does Entropy Change as the Universe Evolves?

Jul 6, 2013 · Replies 7 · Jul 13, 2013

Replies: 7

Views: 3K

The 'Huge-LQG' quasar 'structure' does not violate homogeneity

Jul 11, 2013 · Replies 3 · Jul 11, 2013

Replies: 3

Views: 3K

Cosmos like book/documentary/movie

Jul 8, 2013 · Replies 15 · Jul 10, 2013

Replies: 15

Views: 3K

The cosmological Big Rip and a shrinking hubble radius

Jul 6, 2013 · Replies 10 · Jul 9, 2013

Replies: 10

Views: 4K

Is The Big Bang still a Black Hole.

Jul 8, 2013 · Replies 11 · Jul 8, 2013

Replies: 11

Views: 3K

Question about Cosmological expansion?

Jul 6, 2013 · Replies 13 · Jul 8, 2013

Replies: 13

Views: 4K

Paper: Constraints on Dark Matter in the Solar System

Jul 3, 2013 · Replies 7 · Jul 6, 2013

Replies: 7

Views: 2K

Spacetime expanding at a rate equal to the speed of light

Jul 5, 2013 · Replies 3 · Jul 6, 2013

Replies: 3

Views: 2K

Are Nesting Universes Possible and How Does Gravity Fit In?

Jul 4, 2013 · Replies 6 · Jul 5, 2013

Replies: 6

Views: 2K

Gravitation as curvature of space vs field theory

Jul 5, 2013 · Replies 6 · Jul 5, 2013

Replies: 6

Views: 2K

Is the Hubble Radius the Actual Radius of Our Universe?

Jul 3, 2013 · Replies 12 · Jul 5, 2013

Replies: 12

Views: 3K

Symmetry violation in the early universe - a book

Jul 4, 2013 · Replies 2 · Jul 4, 2013

Replies: 2

Views: 2K

What is the maximum recessive velocity of a galaxy in the observable universe?

Jul 4, 2013 · Replies 5 · Jul 4, 2013

Replies: 5

Views: 5K

Early Universe scalar field, inflaton and analogies in electric field

Jul 3, 2013 · Replies 4 · Jul 4, 2013

Replies: 4

Views: 3K

Length of ruler in expanding Universe

Jun 28, 2013 · Replies 30 · Jul 3, 2013

2

Replies: 30

Views: 6K

99.6% sure the universe is flat, help me understand

Jun 30, 2013 · Replies 8 · Jul 2, 2013

Replies: 8

Views: 3K

Quantum entanglement to communicate from inside black holes

Jun 27, 2013 · Replies 9 · Jul 1, 2013

Replies: 9

Views: 3K

Acceleration/deceleration of the expanding universe?

Jun 29, 2013 · Replies 3 · Jun 29, 2013

Replies: 3

Views: 3K

Where' the hoops? 145 e-fold inflation predicted

Jun 19, 2013 · Replies 15 · Jun 28, 2013

Replies: 15

Views: 4K

Force of Gravity Just Prior to the Big Bang

Jun 27, 2013 · Replies 14 · Jun 27, 2013

Replies: 14

Views: 3K

The Philosophy of Cosmology: a new field of study

Jun 26, 2013 · Replies 10 · Jun 27, 2013

Replies: 10

Views: 3K

Supernova Dimming and Angular Distance Diameter

Jun 25, 2013 · Replies 2 · Jun 26, 2013

Replies: 2

Views: 2K

Giant Collision, the Jupiter in the Recent Past

Jun 25, 2013 · Replies 5 · Jun 25, 2013

Replies: 5

Views: 1K

An infinite universe can expand?

Jun 21, 2013 · Replies 5 · Jun 24, 2013

Replies: 5

Views: 3K

Dark matter and dark energy as a relativistic mass?

Jun 22, 2013 · Replies 3 · Jun 22, 2013

Replies: 3

Views: 3K

A couple of questions about The Big Bang Theory

Jun 16, 2013 · Replies 13 · Jun 20, 2013

Replies: 13

Views: 3K

The vicious circle of standard redshift explanations

Jun 19, 2013 · Replies 22 · Jun 20, 2013

Replies: 22

Views: 4K

Gravitational center of the Local SuperCluster

Jun 19, 2013 · Replies 11 · Jun 20, 2013

Replies: 11

Views: 5K

What is the DM-Radiation Relation Explained on Page 190 of Dodelson's Book?

Jun 17, 2013 · Replies 6 · Jun 19, 2013

Replies: 6

Views: 2K

Is Light Speed Consistent in Conformal Time?

Jun 18, 2013 · Replies 1 · Jun 18, 2013

Replies: 1

Views: 3K

Is there a time paradox in Big Bang cosmology?

Jun 15, 2013 · Replies 12 · Jun 18, 2013

Replies: 12

Views: 4K

How can a universe come from nothing?

May 25, 2013 · Replies 14 · Jun 18, 2013

Replies: 14

Views: 7K

What Was the Speed of Light During Cosmic Inflation?

Jun 13, 2013 · Replies 29 · Jun 15, 2013

Replies: 29

Views: 6K

What Are Acoustic Waves and 7 Peaks in CMB Anisotropy?

Jun 14, 2013 · Replies 2 · Jun 15, 2013

Replies: 2

Views: 3K

What Is the Confusion Surrounding Dark Energy and Its Role in the Universe?

Jun 12, 2013 · Replies 18 · Jun 14, 2013

Replies: 18

Views: 4K

How Does the Expansion of Space Affect Electromagnetic Wave Speed?

Jun 11, 2013 · Replies 6 · Jun 14, 2013

Replies: 6

Views: 2K

Time 'measurement' (or definition) for early universe

Jun 13, 2013 · Replies 9 · Jun 13, 2013

Replies: 9

Views: 3K

How can we tell if the universe is rotating?

Jun 11, 2013 · Replies 18 · Jun 13, 2013

Replies: 18

Views: 4K

Dark Energy Horizon: Light's Eternal Boundary?

Jun 11, 2013 · Replies 7 · Jun 11, 2013

Replies: 7

Views: 3K

Looking for some help with gravitational lensing and dark matter

Jun 9, 2013 · Replies 5 · Jun 11, 2013

Replies: 5

Views: 3K

Interstellar travel is impossible, moore's law is finite, the heat dea

Jun 7, 2013 · Replies 6 · Jun 10, 2013

Replies: 6

Views: 5K

Why do I never hear that the BB was caused by a collapsing black hole?

Jun 6, 2013 · Replies 11 · Jun 10, 2013

Replies: 11

Views: 3K

If the universe is finite in size, what is at the end of it?

Jan 10, 2013 · Replies 53 · Jun 10, 2013

2

Replies: 53

Views: 9K

The Dark Flow & the Existence of Other Universes -New Claims of Har

Jun 1, 2013 · Replies 28 · Jun 9, 2013

Replies: 28

Views: 5K

A 13.2Billion year old star just 186 Lyrs from earth

Jun 6, 2013 · Replies 4 · Jun 8, 2013

Replies: 4

Views: 2K

Origin of Time: Theory of Big Bang Universe

Jun 1, 2013 · Replies 44 · Jun 8, 2013

2

Replies: 44

Views: 8K

Why wouldn't the Earth gravitate towards the Sun?

May 31, 2013 · Replies 19 · Jun 7, 2013

Replies: 19

Views: 12K

Can the universe be flat, yet finite?

Jun 6, 2013 · Replies 10 · Jun 7, 2013

Replies: 10

Views: 4K

Why do we need the inflaton to expland space-time?

Jun 6, 2013 · Replies 4 · Jun 6, 2013

Replies: 4

Views: 2K

Re: artificial intelligence tied to universe construct?

Jun 5, 2013 · Replies 8 · Jun 5, 2013

Replies: 8

Views: 2K

Cosmic Slow Down: Is Dark Energy Variable?

Jun 5, 2013 · Replies 3 · Jun 5, 2013

Replies: 3

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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