Menu

Navigation

More options

Style variation

Contact us

Cosmology Forum

Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.

Filters

Problem with Surface Brightness & cosmological parameters

Nov 16, 2014 · Replies 3 · Nov 16, 2014

Replies: 3

Views: 1K

How to understand Friedman equation

Nov 12, 2014 · Replies 11 · Nov 16, 2014

Replies: 11

Views: 2K

Excluding a simple dark matter candidate

Nov 16, 2014 · Replies 1 · Nov 16, 2014

Replies: 1

Views: 1K

Future of Universe: Big Freeze, Big Rip, Big Crunch, Big Bounce?

Oct 26, 2014 · Replies 37 · Nov 16, 2014

2

Replies: 37

Views: 6K

Why can the universe be expanding inward away from point of singularity (POS)?

Oct 28, 2014 · Replies 27 · Nov 16, 2014

Replies: 27

Views: 5K

Our galaxy is one of the biggest

Nov 14, 2014 · Replies 4 · Nov 15, 2014

Replies: 4

Views: 1K

Half of All Stars in Galactic Halos: Potential to Rethink Mass Estimates?

Nov 6, 2014 · Replies 4 · Nov 13, 2014

Replies: 4

Views: 2K

Pairwise velocity dispersion in Cosmological simulations

Nov 10, 2014 · Replies 6 · Nov 11, 2014

Replies: 6

Views: 1K

Does the Universe always have the same mass, or can it leak into other realms?

Nov 11, 2014 · Replies 19 · Nov 11, 2014

Replies: 19

Views: 1K

Interstellar the movie and real physics

Nov 11, 2014 · Replies 1 · Nov 11, 2014

Replies: 1

Views: 2K

Unraveling the Mystery: The Big Bang and the Origin of the Universe

Nov 10, 2014 · Replies 2 · Nov 10, 2014

Replies: 2

Views: 2K

What Theories Exist About the Edge of the Universe?

Sep 25, 2014 · Replies 4 · Nov 8, 2014

Replies: 4

Views: 2K

Cosmological Curvature: A $10 Bet with My Professor

Oct 31, 2014 · Replies 27 · Nov 7, 2014

Replies: 27

Views: 3K

How Did Supermassive Black Holes Grow So Massive So Quickly?

Nov 6, 2014 · Replies 4 · Nov 7, 2014

Replies: 4

Views: 2K

Explaining the Big Bang: The Science Behind the Universe's Rapid Expansion

Nov 1, 2014 · Replies 24 · Nov 6, 2014

Replies: 24

Views: 3K

Is Dark Energy the Answer to the Accelerating Universe and Big Bang Conundrums?

Nov 5, 2014 · Replies 3 · Nov 5, 2014

Replies: 3

Views: 2K

What is the Breakdown of the Milky Way's Mass?

Nov 5, 2014 · Replies 3 · Nov 5, 2014

Replies: 3

Views: 3K

Alan Guth:Inflationary Cosmology live stream 10/31

Oct 30, 2014 · Replies 2 · Nov 5, 2014

Replies: 2

Views: 1K

How Can We See the Light from the Big Bang if We Expanded from the Same Origin?

Nov 4, 2014 · Replies 12 · Nov 4, 2014

Replies: 12

Views: 2K

Does Positive Curvature Dominate FRW Cosmological Models in Inflation Theory?

Nov 2, 2014 · Replies 12 · Nov 4, 2014

Replies: 12

Views: 2K

What Came Before the Big Bang?

Oct 27, 2014 · Replies 38 · Nov 3, 2014

2

Replies: 38

Views: 4K

What Causes Red Shift in Cosmology: Expansion of Space or EM Red-Shift?

Oct 29, 2014 · Replies 11 · Nov 3, 2014

Replies: 11

Views: 2K

Big Bang ruled out as origin of lithium-6

Sep 11, 2014 · Replies 33 · Nov 3, 2014

2

Replies: 33

Views: 7K

Cosmological redshift: Where does the energy go?

Nov 2, 2014 · Replies 2 · Nov 3, 2014

Replies: 2

Views: 2K

Could the Event Horizon of black holes be the edge of expanding universes?

Nov 2, 2014 · Replies 1 · Nov 2, 2014

Replies: 1

Views: 1K

What causes red shift in the universe?

Oct 10, 2014 · Replies 43 · Oct 31, 2014

2

Replies: 43

Views: 5K

Expanding Universe: Verifying Space Expansion Through Galaxies

Oct 29, 2014 · Replies 7 · Oct 30, 2014

Replies: 7

Views: 2K

How/why are pocket universes created during eternal inflation?

Oct 12, 2014 · Replies 39 · Oct 30, 2014

2

Replies: 39

Views: 7K

Zero-point energy density evaluation

Oct 20, 2014 · Replies 19 · Oct 30, 2014

Replies: 19

Views: 2K

Stars that look older than the universe

Oct 28, 2014 · Replies 5 · Oct 28, 2014

Replies: 5

Views: 1K

Question regarding to acceleration in the rate of expansion of our cosmos

Oct 28, 2014 · Replies 3 · Oct 28, 2014

Replies: 3

Views: 1K

Sinking instead of expanding universe?

Oct 16, 2014 · Replies 23 · Oct 27, 2014

Replies: 23

Views: 3K

FRW pertubations in overdense and underdense regions

Oct 22, 2014 · Replies 1 · Oct 26, 2014

Replies: 1

Views: 1K

Non equilibrium boson distribution function

Oct 22, 2014 · Replies 1 · Oct 25, 2014

Replies: 1

Views: 2K

Which Has A Stronger Gravitational Pull - A Black Hole or Neutron Star?

Oct 24, 2014 · Replies 5 · Oct 25, 2014

Replies: 5

Views: 5K

Photon's History: Quantum Expression for Energy Loss with Scale Factor Increase

Oct 19, 2014 · Replies 9 · Oct 23, 2014

Replies: 9

Views: 2K

Trying to understand the universe .possible at 13 years old?

Oct 18, 2014 · Replies 12 · Oct 23, 2014

Replies: 12

Views: 2K

Can black holes hold the key to the origin of our universe?

Oct 21, 2014 · Replies 1 · Oct 22, 2014

Replies: 1

Views: 1K

Origin of our universe 4D black hole

Oct 20, 2014 · Replies 33 · Oct 21, 2014

2

Replies: 33

Views: 4K

Dark matter possibly explained by axions?

Oct 18, 2014 · Replies 19 · Oct 20, 2014

Replies: 19

Views: 2K

Why do large elliptical galaxies not collapse due to their gravity?

Oct 18, 2014 · Replies 8 · Oct 19, 2014

Replies: 8

Views: 5K

Is Infinite Space the Key to Understanding the Big Bang?

Oct 9, 2014 · Replies 16 · Oct 18, 2014

Replies: 16

Views: 3K

Does cosmic time (or comoving clock) run at the same pace at all times?

Oct 9, 2014 · Replies 23 · Oct 18, 2014

Replies: 23

Views: 4K

Are High Z SNe Brighter than LCMD Predicts?

Oct 16, 2014 · Replies 1 · Oct 17, 2014

Replies: 1

Views: 872

Current Research on Communication Between Universes?

Oct 13, 2014 · Replies 8 · Oct 16, 2014

Replies: 8

Views: 3K

Why do black holes vanish over time?

Oct 13, 2014 · Replies 16 · Oct 15, 2014

Replies: 16

Views: 2K

Dark Matter does not exist, what do you think?

Sep 24, 2014 · Replies 59 · Oct 13, 2014

2

Replies: 59

Views: 6K

What Are the Mysteries of the Universe We Still Need to Understand?

Oct 11, 2014 · Replies 9 · Oct 13, 2014

Replies: 9

Views: 2K

Unraveling the Expansion of Our Universe: Seeking Answers | Nautical Thoughts

Oct 13, 2014 · Replies 3 · Oct 13, 2014

Replies: 3

Views: 1K

What is the true purpose of inflation in the early universe?

Sep 25, 2014 · Replies 41 · Oct 11, 2014

2

Replies: 41

Views: 5K

What is the Visible Mass of the Milky Way?

Oct 1, 2014 · Replies 4 · Oct 10, 2014

Replies: 4

Views: 3K

Galaxy Formation: Searching for Primordial Origins

Sep 18, 2014 · Replies 29 · Oct 10, 2014

Replies: 29

Views: 3K

Can There Be Time Without Space? A Question for Discussion

Oct 9, 2014 · Replies 3 · Oct 10, 2014

Replies: 3

Views: 1K

Why does light travel radially in the FRW universe?

Oct 6, 2014 · Replies 5 · Oct 9, 2014

Replies: 5

Views: 2K

Is there an unseen part of the universe older than the known universe?

Oct 8, 2014 · Replies 3 · Oct 9, 2014

Replies: 3

Views: 1K

Big Bang, big rip, lQc, has anyone ever run a computer simulation?

Oct 8, 2014 · Replies 5 · Oct 8, 2014

Replies: 5

Views: 2K

Why does inflation generate gravity waves?

Oct 3, 2014 · Replies 5 · Oct 8, 2014

Replies: 5

Views: 2K

Was the CMB Radiation Predicted or Post-Dicted by Big Bang Cosmology?

Oct 1, 2014 · Replies 28 · Oct 8, 2014

Replies: 28

Views: 3K

Dark Matter: Why doesnt dark matter coalesce 'into' Ordinary Matter - Repost

Oct 4, 2014 · Replies 9 · Oct 6, 2014

Replies: 9

Views: 3K

Black Holes Colliding: Evidence & Expectations

Oct 6, 2014 · Replies 3 · Oct 6, 2014

Replies: 3

Views: 2K

Mass Profile in Elliptical Galaxies

Oct 6, 2014 · Replies 1 · Oct 6, 2014

Replies: 1

Views: 1K

Where Is Dark Matter in the Universe?

Aug 4, 2014 · Replies 15 · Oct 6, 2014

Replies: 15

Views: 3K

I don't believe in singularities

Oct 6, 2014 · Replies 10 · Oct 6, 2014

Replies: 10

Views: 2K

Is the Universe Actually Collapsing Instead of Expanding?

Oct 4, 2014 · Replies 8 · Oct 5, 2014

Replies: 8

Views: 2K

Making basic astro/cosmo calculations easy with google calculator--examples

Oct 4, 2014 · Replies 2 · Oct 4, 2014

Replies: 2

Views: 2K

Is it accurate to say 99% of the universe is pure black with no sound?

Oct 4, 2014 · Replies 4 · Oct 4, 2014

Replies: 4

Views: 1K

When Was the Universe's Expansion Rate Zero?

Sep 16, 2014 · Replies 53 · Oct 4, 2014

2

Replies: 53

Views: 5K

Dark Energy an effect of inhomogeneity?

Oct 3, 2014 · Replies 5 · Oct 3, 2014

Replies: 5

Views: 2K

Beginning of accelerating expansion

Oct 2, 2014 · Replies 3 · Oct 2, 2014

Replies: 3

Views: 1K

Missing low-metalicity Red Dwarves

Oct 2, 2014 · Replies 1 · Oct 2, 2014

Replies: 1

Views: 927

Why is temperature inversely proportional to the horizon's area?

Oct 2, 2014 · Replies 7 · Oct 2, 2014

Replies: 7

Views: 2K

How did massive black holes form and grow in the early universe?

Sep 25, 2014 · Replies 16 · Oct 2, 2014

Replies: 16

Views: 2K

Unraveling the Mysteries of Dark Energy and Dark Matter in the Universe

Sep 28, 2014 · Replies 6 · Oct 1, 2014

Replies: 6

Views: 2K

Where can I find an updated Milky Way density profile for my simulation?

Sep 29, 2014 · Replies 4 · Oct 1, 2014

Replies: 4

Views: 2K

Infinite Regress | Why is everyone telling me I am wrong?

Sep 10, 2014 · Replies 40 · Sep 30, 2014

2

Replies: 40

Views: 5K

Is hyperbolic space consistent with homogeneity?

Sep 29, 2014 · Replies 4 · Sep 30, 2014

Replies: 4

Views: 1K

Can another blackhole pull you out of the event horizon of a blackhole

Aug 31, 2014 · Replies 34 · Sep 28, 2014

2

Replies: 34

Views: 4K

Horizon distance at last scattering surface

Sep 22, 2014 · Replies 6 · Sep 28, 2014

Replies: 6

Views: 3K

Spiral Galaxies as Gravity Lense

Sep 25, 2014 · Replies 3 · Sep 27, 2014

Replies: 3

Views: 2K

Explore Laniakea: The Supercluster Earth is in

Sep 27, 2014 · Replies 1 · Sep 27, 2014

Replies: 1

Views: 2K

Empty Space: Energy, Warping, Bending, & Gravity

Sep 25, 2014 · Replies 2 · Sep 26, 2014

Replies: 2

Views: 2K

Carbon based Life vs. Plasma based Life.

Sep 24, 2014 · Replies 6 · Sep 24, 2014

Replies: 6

Views: 6K

Rethinking the origins of the universe

Sep 24, 2014 · Replies 3 · Sep 24, 2014

Replies: 3

Views: 2K

What happens beyond 13,7 billion light-years?

Aug 20, 2014 · Replies 15 · Sep 24, 2014

Replies: 15

Views: 3K

Dark energy: is it just "lost" light?

Sep 23, 2014 · Replies 2 · Sep 24, 2014

Replies: 2

Views: 1K

Where is the future if everywhere is the past?

Sep 23, 2014 · Replies 11 · Sep 23, 2014

Replies: 11

Views: 2K

Age Universe: Unobservable Matter & Galaxies

Sep 20, 2014 · Replies 13 · Sep 23, 2014

Replies: 13

Views: 2K

The Cosmological Constant with Inflation is not Constant

Sep 21, 2014 · Replies 5 · Sep 22, 2014

Replies: 5

Views: 2K

Analysis: Why BICEP2 & PLAnck Are in Tension

May 13, 2014 · Replies 17 · Sep 22, 2014

Replies: 17

Views: 6K

Helium formation during nucleosynthesis

Sep 21, 2014 · Replies 2 · Sep 21, 2014

Replies: 2

Views: 1K

Proof That Universe Can Form Spontaneously From Nothingness

Sep 20, 2014 · Replies 2 · Sep 20, 2014

Replies: 2

Views: 2K

Are Redshifts Used to Specify Locations in Cosmology?

Sep 17, 2014 · Replies 7 · Sep 19, 2014

Replies: 7

Views: 1K

Multipole Map with Healpix routines

Sep 17, 2014 · Replies 2 · Sep 18, 2014

Replies: 2

Views: 2K

Is Planck Dust Modeling Consistent with BICEP2 Assumptions?

Sep 10, 2014 · Replies 2 · Sep 17, 2014

Replies: 2

Views: 2K

Why is the Universe Expanding and Not Contracting?

Sep 14, 2014 · Replies 13 · Sep 16, 2014

Replies: 13

Views: 3K

Neutron Star at Near Light Speed

Sep 16, 2014 · Replies 6 · Sep 16, 2014

Replies: 6

Views: 2K

Questions re: the edge of the observable universe

Sep 15, 2014 · Replies 4 · Sep 16, 2014

Replies: 4

Views: 3K

Modern Cosmology: Fine Tuning Problem | Adarsh

Sep 12, 2014 · Replies 7 · Sep 15, 2014

Replies: 7

Views: 2K

Time derivative of Hubble parameter

Sep 15, 2014 · Replies 1 · Sep 15, 2014

Replies: 1

Views: 5K

Primodial power spectrum of scalar perturbations

Sep 14, 2014 · Replies 2 · Sep 15, 2014

Replies: 2

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.

Top