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Universe
New post in Universe
Is there a natural source of Antimatter in this universe?
August 15th, 2022
antimatter
particle-physics
astrophysics
universe
Does a place without gravity exist in the universe?
March 22nd, 2020
universe
gravity
What is the limit of the universe?
May 17th, 2020
space-expansion
universe
spacetime
cosmology
Regarding possibility of infinitely many spatial dimensions
November 12th, 2020
universe
spacetime-dimensions
Is the structural similarity between atoms ( smallest) and universe (biggest) a conincidence. Or there can a reason for this beyond imaginations
July 25th, 2020
atomic-physics
universe
Can we see ALL of the observable universe?
September 17th, 2020
universe
Why do physicists think that the dark matter is cold?
December 16th, 2020
dark-matter
universe
cosmology
temperature
What if the size of the Universe doubled?
February 28th, 2020
spacetime
cosmology
universe
physical-constants
A Fermi-question: Are there more stars than grains of sand?
August 1st, 2022
order-of-magnitude
universe
Entropy of an empty universe
August 15th, 2020
cosmology
universe
entropy
Rotational relativity? Is there an universal frame of reference for rotation?
August 1st, 2022
reference-frames
machs-principle
cosmology
general-relativity
universe
Obtaining a copy of Hawking's Ph.D thesis - Properties of Expanding Universes
October 24th, 2020
singularities
big-bang
universe
general-relativity
specific-reference
Physical laws prior the big bang (quantum fluctuations)
July 28th, 2020
universe
cosmology
quantum-gravity
big-bang
popular-science
Why aren't we Boltzmann brains in an infinite universe?
January 6th, 2020
cosmology
statistical-mechanics
universe
anthropic-principle
poincare-recurrence
How many states are there in the observable universe?
November 23rd, 2021
observable-universe
quantum-information
entropy
universe
estimation
Is there a center of the Universe if the Universe is finite?
March 11th, 2020
universe
space-expansion
big-bang
If randomness doesn't exist, how come the universe isn't a perfect sphere with predictable distribution of matter?
August 1st, 2022
determinism
big-bang
universe
quantum-mechanics
Virtual Particles real? Virtual particles create a universe?
June 7th, 2020
quantum-field-theory
universe
vacuum
virtual-particles
Can the coordinate of the big bang point be calculated via observed universe or it is impossible?
May 14th, 2020
big-bang
cosmology
observable-universe
universe
space-expansion
Is the universe linear? If so, why?
March 9th, 2020
hilbert-space
quantum-mechanics
linear-systems
superposition
universe
What is the extent of the universe?
August 1st, 2022
spacetime
universe
space-expansion
cosmology
Does gravity slow the expansion of the universe?
August 1st, 2022
gravity
cosmology
universe
space-expansion
Are we big or small?
August 1st, 2022
universe
scaling
Is there anything in the universe that is completely static?
December 6th, 2020
universe
spacetime
equilibrium
Mathematically possible vs physically probable outcomes
June 18th, 2020
cosmology
statistical-mechanics
astrophysics
universe
probability
Angular Power Spectrum of CMB
January 28th, 2020
cosmology
universe
cosmic-microwave-background
Is "speed relative to the universe" a well-defined concept?
August 26th, 2021
observable-universe
cosmology
reference-frames
coordinate-systems
universe
Would one actually find their doppelgänger in a "Googolplex Universe"?
September 26th, 2020
probability
universe
Infinite universe - Jumping to pointless conclusions
January 8th, 2021
probability
universe
What does ionization of neutral Hydrogen have to do with "transparency"?
February 4th, 2020
hydrogen
galaxies
universe
cosmology
spectroscopy
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