Cosmology Forum

Post thread
Join in expert discussion on topics revolving around cosmology. Cosmology is the origin, evolution, structure and eventual fate of the universe.
Direct detection of dark matter tendrils?
  • · Replies 7 ·
Replies
7
Views
3K
What is the heaviest thing in the universe?
  • · Replies 8 ·
Replies
8
Views
4K
How Does a 3.5D Perspective Enhance Our Understanding of Spacetime Expansion?
  • · Replies 17 ·
Replies
17
Views
6K
A theory about the beginning of the universe
  • · Replies 7 ·
Replies
7
Views
3K
Understanding the Zero Energy Principle of the Universe
  • · Replies 39 ·
2
Replies
39
Views
12K
Isotropic and homogeneous of space
  • · Replies 3 ·
Replies
3
Views
3K
The Fate of the Universe: Expansion, Matter Decay, and the Ultimate End
  • · Replies 72 ·
3
Replies
72
Views
13K
Unraveling the Mystery of the Universe's Center: Theories and Explanations
  • · Replies 18 ·
Replies
18
Views
4K
Is the Universe's Expansion Rate Truly Accelerating?
  • · Replies 17 ·
Replies
17
Views
4K
Basic Big-Bang ?'s For First Thread
  • · Replies 9 ·
Replies
9
Views
3K
The Universe shouldn't look like it does if it is expanding
  • · Replies 27 ·
Replies
27
Views
7K
Latest z >1 Type1a supernova results?
  • · Replies 2 ·
Replies
2
Views
2K
What is the Latest Measurement of the Hubble Constant Using Infrared Light?
  • · Replies 4 ·
Replies
4
Views
3K
Could a universal Oort cloud structure cause expansive acceleration?
  • · Replies 15 ·
Replies
15
Views
4K
Could dark energy and expansion of space be just a topological effect?
  • · Replies 2 ·
Replies
2
Views
3K
When talking cosmology what exactly is a manifold, is there any
  • · Replies 5 ·
Replies
5
Views
3K
Cosmic Distance Ladder: Advancing Physics of Cosmic Distances
  • · Replies 2 ·
Replies
2
Views
2K
Philosophical: Is the universe a type of Turing machine?
  • · Replies 6 ·
Replies
6
Views
2K
Discover the Fascinating Olber's Paradox in This Cartoon Cosmology Video
  • · Replies 3 ·
Replies
3
Views
2K
Expansion of the universe and the speed of light
  • · Replies 15 ·
Replies
15
Views
5K
Simple Beginner Dark Matter Question
  • · Replies 4 ·
Replies
4
Views
3K
Why cannot the universe have net angular momentum?
  • · Replies 9 ·
Replies
9
Views
4K
Light from MACS 1149-JD implausible
  • · Replies 4 ·
Replies
4
Views
3K
Omega being less than one in a flat Universe?
  • · Replies 1 ·
Replies
1
Views
4K
Is Everything Shrinking Instead of Space Expanding in the Big Bang Theory?
  • · Replies 14 ·
Replies
14
Views
3K
Is the CMBR a relic from the big bang or an image from background galaxies?
  • · Replies 6 ·
Replies
6
Views
2K
Number of Voids in the (observable) Universe
  • · Replies 16 ·
Replies
16
Views
5K
Can Light Be Slowed or Even Stopped?
  • · Replies 8 ·
Replies
8
Views
4K
What Is the Universe Expanding Into?
  • · Replies 37 ·
2
Replies
37
Views
9K
Would Cosmic Expansion Break a Tether Between Galaxies?
  • · Replies 10 ·
Replies
10
Views
3K
Does the holographic principle remove the need for dark matter
  • · Replies 2 ·
Replies
2
Views
3K
How inflation solves the horizon problem
  • · Replies 10 ·
Replies
10
Views
4K
Is Dark Matter Uniformly Distributed Locally and in Distant Galaxies?
  • · Replies 9 ·
Replies
9
Views
4K
Dark Matter: Understanding Its Nature & Impact on Stars, Planets
  • · Replies 26 ·
Replies
26
Views
5K
Why is the age of the Universe the reciprocal of the Hubble constant?
  • · Replies 33 ·
2
Replies
33
Views
11K
Could a cosmo tabulator give hands-on experience with cosmic Event Horizon?
  • · Replies 10 ·
Replies
10
Views
8K
Is the Decaying Vacuum Model a Complete Description of Cosmic Expansion?
  • · Replies 1 ·
Replies
1
Views
2K
Space Smoothness: Virtual Particle Effects on Photon Paths
  • · Replies 1 ·
Replies
1
Views
2K
Gravity and the expanding universe
  • · Replies 1 ·
Replies
1
Views
2K
Why does the cosmic microwave background make a noise
  • · Replies 2 ·
Replies
2
Views
3K
Brian Powell's latest paper: Scalar runnings
  • · Replies 3 ·
Replies
3
Views
2K
Does CMBR Cooling Mirror Black Body Radiation Processes?
  • · Replies 3 ·
Replies
3
Views
3K
Hubble's law and the age of the universe
  • · Replies 6 ·
Replies
6
Views
6K
How can the universe be moving faster?
  • · Replies 2 ·
Replies
2
Views
2K
Cosmological models and begining and ending of universe
  • · Replies 2 ·
Replies
2
Views
2K
Peer-reviewed case study of how an ideal universe would work
  • · Replies 10 ·
Replies
10
Views
2K
Why are we so sure the universe existed in a point 13.7 billion years ago?
  • · Replies 7 ·
Replies
7
Views
4K
  • Poll Poll
Non-expanding solution to redshift observations
  • · Replies 10 ·
Replies
10
Views
3K
Is there a problem in assuming the universe has a boundary?
  • · Replies 42 ·
2
Replies
42
Views
8K
Is the Earth's Distance from the Moon Affected by Universal Expansion?
  • · Replies 19 ·
Replies
19
Views
5K
Is universe a 3 dimensional fractal .?
  • · Replies 4 ·
Replies
4
Views
3K
  • Poll Poll
Keep track of cosmos by size or by elapsed time? Your preference?
  • · Replies 11 ·
Replies
11
Views
3K
Age of the universe in earth's reference frame?
  • · Replies 13 ·
Replies
13
Views
6K
NASA's new WISE Survey Results (and dark matter)
  • · Replies 2 ·
Replies
2
Views
3K
What proof is there that time started at the moment of the big bang
  • · Replies 21 ·
Replies
21
Views
5K
Is the Universe Truly Flat While Space-Time Curves?
  • · Replies 27 ·
Replies
27
Views
6K
After the Big bang ,when did the first atoms form?
  • · Replies 4 ·
Replies
4
Views
19K
Are Supersymmetric Inflation Models Still Viable After LHC's Latest Results?
  • · Replies 2 ·
Replies
2
Views
2K
Does the big bang theory conflict with the law of conservation?
  • · Replies 10 ·
Replies
10
Views
11K
Measuring the size of the observable universe
  • · Replies 1 ·
Replies
1
Views
3K
F(R) gravity with non-minimal carvature-matter coupling
  • · Replies 2 ·
Replies
2
Views
2K
Early galaxies in formative stages: where are they now?
  • · Replies 6 ·
Replies
6
Views
3K
Question about universe formation
  • · Replies 5 ·
Replies
5
Views
2K
Where Does Energy Originate?
  • · Replies 169 ·
6
Replies
169
Views
33K
Supernova 1a Distance Calibration & Implications for H_0
  • · Replies 3 ·
Replies
3
Views
3K
How Do Two Doubling Times Shape the Standard Cosmic Model?
  • · Replies 11 ·
Replies
11
Views
4K
Dark Matter and Eternal Inflation
  • · Replies 13 ·
Replies
13
Views
4K
Can Quantum Mechanics Explain Multiple Universes in the CMB Map?
  • · Replies 7 ·
Replies
7
Views
2K
Big Bang modeled as a phase-change
  • · Replies 15 ·
Replies
15
Views
4K
Did the universe start as dimensionless and evolve through higher dimensions?
  • · Replies 8 ·
Replies
8
Views
4K
Dark Matter in Galaxies/Star Clusters
  • · Replies 3 ·
Replies
3
Views
2K
Power of inflation in relation to expansion
  • · Replies 9 ·
Replies
9
Views
4K
How much energy is there in the Universe?
  • · Replies 9 ·
Replies
9
Views
11K
Light’s temperature and particle’s temperature from 3000K
  • · Replies 6 ·
Replies
6
Views
3K
Could a Curved Boundary of Space-Time Explain Dark Energy?
  • · Replies 4 ·
Replies
4
Views
2K
Curious about the age of the Universe
  • · Replies 18 ·
Replies
18
Views
4K
Mass Absorption -V- Black Hole size
  • · Replies 2 ·
Replies
2
Views
2K
Understanding Energy Density in Cosmology
  • · Replies 3 ·
Replies
3
Views
4K
Looking for source of cosmology/astrophysics quote
  • · Replies 5 ·
Replies
5
Views
2K
Copenhagen interpretation of Big Bang
  • · Replies 8 ·
Replies
8
Views
3K
The nature of nothingness/space, and potential multiverse
  • · Replies 9 ·
Replies
9
Views
3K
Review of Evidence for Dark Matter
  • · Replies 5 ·
Replies
5
Views
3K
Could dark energy be gravitational potential energy?
  • · Replies 4 ·
Replies
4
Views
3K
Cosmic Microwave Background Radiation
  • · Replies 23 ·
Replies
23
Views
8K
Quantum tunneling and the universe
  • · Replies 74 ·
3
Replies
74
Views
8K
Why Does Dark Matter Appear Scale Variant in Galactic Rotation?
  • · Replies 4 ·
Replies
4
Views
2K
Will the expanding universe really end up cold and empty?
  • · Replies 12 ·
Replies
12
Views
3K
Low Entropy big bang , models that explain it
  • · Replies 2 ·
Replies
2
Views
2K
Viscous fingering and structure of space
  • · Replies 2 ·
Replies
2
Views
2K
Big Crunch to Big Bang: Is Our Universe Eternal?
  • · Replies 2 ·
Replies
2
Views
2K
Does WMAP data imply spacetime is flat?
  • · Replies 14 ·
Replies
14
Views
4K
Is there an event horizon beyond the visible universe?
  • · Replies 15 ·
Replies
15
Views
6K
Derivation of the formula for cosmological redshift
  • · Replies 32 ·
2
Replies
32
Views
15K
Lightlike radial null geodesic - how do we know it has constant theta and phi?
  • · Replies 3 ·
Replies
3
Views
4K
Trying to understand the normalisation of the scale factor to be 1 today
  • · Replies 4 ·
Replies
4
Views
3K
How Does Order Arise from Disorder Despite the 2nd Law of Thermodynamics?
  • · Replies 10 ·
Replies
10
Views
4K
Super Structure - Evidence for Handedness Spiral Galaxies
  • · Replies 2 ·
Replies
2
Views
3K
Black Hole Information Loss Question
  • · Replies 64 ·
3
Replies
64
Views
15K
Is Dark Energy Present Everywhere in the Universe?
  • · Replies 28 ·
Replies
28
Views
7K
Could a Hypernova Have Caused the Big Bang?
  • · Replies 7 ·
Replies
7
Views
4K