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Universe
New post in Universe
Total momentum of the Universe
September 22nd, 2020
cosmology
big-bang
momentum
universe
Does "Infinite Universe" Imply Infinite Mass?
October 7th, 2020
cosmology
energy
symmetry
universe
mass
Scale factor and age of the universe
July 29th, 2020
universe
cosmology
space-expansion
time
Is there a universal rest frame of reference?
August 1st, 2022
universe
general-relativity
special-relativity
speed-of-light
relativity
Reconciling "The Big Crunch" with the 2nd Law of Thermodynamics
May 16th, 2020
general-relativity
cosmology
universe
black-holes
singularities
Are the implications of an infinite universe necessarily so unsettling
August 1st, 2022
universe
spacetime
cosmology
If everything is relative to each other in this universe, why do we keep the Sun to be the reference point?
August 1st, 2022
reference-frames
solar-system
sun
earth
universe
What is the inertial frame that explains the Foucault Pendulum?
August 1st, 2022
classical-mechanics
universe
inertial-frames
general-relativity
Looking out into the universe means looking back in time - how does that work?
August 1st, 2022
cosmology
universe
space-expansion
time
Poincaré Recurrence and Immortality
August 1st, 2022
poincare-recurrence
statistical-mechanics
universe
Why is the hypersphere not seriously considered by cosmologists as the best model for the overall shape of the universe?
August 1st, 2022
spacetime
universe
space-expansion
curvature
cosmology
What happens when a photon reaches the "edge" of the universe?
October 1st, 2020
universe
How do we know that there is more than one photon in the universe?
August 14th, 2020
universe
photons
Do we live in a world with 4 or more dimension?
April 2nd, 2020
spacetime-dimensions
universe
spacetime
What is the opposite of the Planck length?
August 1st, 2022
absolute-units
cosmology
universe
units
physical-constants
Is it possible for one side of the universe to "meet" the other?
August 1st, 2022
theory-of-everything
universe
Is false vacuum bubble nucleation possible in our universe?
October 27th, 2020
speed-of-light
cosmology
universe
space-expansion
vacuum
Is there anything physically infinite?
August 1st, 2022
universe
space-expansion
epistemology
ontology
What is the universe 'expanding' into?
February 7th, 2020
space-expansion
universe
Are there more bosons or fermions in the universe?
August 1st, 2022
fermions
particle-physics
universe
bosons
The inner workings of the Olbers paradox
April 29th, 2021
spacetime
cosmology
universe
Questions about the Jeans length
April 8th, 2020
gravitational-collapse
universe
cosmology
gravity
Value of the Hubble parameter over time
January 23rd, 2020
space-expansion
general-relativity
cosmology
universe
Why quantum fluctuation existed before big bang?
August 1st, 2022
big-bang
universe
spacetime
quantum-mechanics
Can we prove that the universe is finite or infinite?
August 1st, 2022
universe
Estimating age of the universe by Hubble's law?
July 11th, 2020
cosmology
space-expansion
universe
Age of Universe from Friedmann Equation - How to actually solve the integral?
February 25th, 2020
big-bang
general-relativity
cosmology
space-expansion
universe
Why it is said that Universe is an isolated system?
October 2nd, 2020
universe
thermodynamics
entropy
How many electrons are there in the universe?
February 9th, 2020
cosmology
estimation
universe
electrons
What is space made of?
March 18th, 2020
universe
general-relativity
vacuum
spacetime
gravity
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