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Observable-universe
New post in Observable-universe
How long would it take to see the nearest star die?
June 1st, 2022
speed-of-light
astronomy
stars
observable-universe
Non-observable universe vs last scattering surface
June 15th, 2022
cosmic-microwave-background
cosmology
observable-universe
What kind of accuracy could one get with Pi to 40 decimal places?
June 16th, 2022
observable-universe
What are we all falling towards?
June 1st, 2022
gravity
observable-universe
space-expansion
cosmology
Can we observe an edge of the universe?
June 13th, 2022
universe
observable-universe
How can the universe be dodecahedron-shaped?
June 14th, 2022
spacetime
special-relativity
cosmology
general-relativity
observable-universe
What is the most common photon wavelength in our observable universe (not including the Sun)?
June 16th, 2022
photons
frequency
wavelength
observable-universe
visible-light
Size of the Observable Universe
June 15th, 2022
cosmology
space-expansion
faster-than-light
observable-universe
universe
Is the universe bounded?
June 14th, 2022
big-bang
universe
spacetime
cosmology
observable-universe
The location of the exact center of the observable universe
June 1st, 2022
general-relativity
reference-frames
observable-universe
big-bang
cosmology
What's the total Cosmic Microwave Background energy?
June 16th, 2022
observable-universe
cosmic-microwave-background
Why is CMB not considered as the edge of the universe?
June 1st, 2022
cosmic-microwave-background
cosmology
observable-universe
How can we know there is more than just the observable universe
June 14th, 2022
universe
observable-universe
Understanding the CMB background as a reference frame
April 12th, 2022
cosmology
observable-universe
cosmic-microwave-background
astronomy
reference-frames
How many states are there in the observable universe?
June 14th, 2022
estimation
universe
entropy
quantum-information
observable-universe
Can the coordinate of the big bang point be calculated via observed universe or it is impossible?
June 1st, 2022
observable-universe
space-expansion
universe
cosmology
big-bang
Is "speed relative to the universe" a well-defined concept?
June 1st, 2022
reference-frames
coordinate-systems
universe
observable-universe
cosmology
If we were able to prove that the universe is infinite, wouldn't that statistically prove that there is no other forms of life?
June 14th, 2022
cosmology
statistical-mechanics
universe
observable-universe
Can light reach far away galaxies in an expanding universe?
June 13th, 2022
general-relativity
observable-universe
space-expansion
speed-of-light
cosmology
Will the CMB ever stop shining?
June 16th, 2022
observable-universe
cosmic-microwave-background
cosmology
The difference between comoving and proper distances in defining the observable universe
June 16th, 2022
observable-universe
cosmology
spacetime
space-expansion
distance
As the universe ages, will we see more stars or less?
June 13th, 2022
observable-universe
cosmology
universe
space-expansion
Why is the sky dark at night?
June 16th, 2022
cosmology
observable-universe
stars
everyday-life
visible-light
Could the observable universe be bigger than the universe?
June 13th, 2022
cosmology
universe
observable-universe
How would the night sky appear at the edge of the galaxy?
January 16th, 2020
galaxies
observable-universe
astronomy
Is the temperature of the universe rising?
June 14th, 2022
observable-universe
temperature
space-expansion
universe
cosmology
Ambiguity in applying Newton's shell theorem in an infinite homogeneous universe
June 12th, 2022
thought-experiment
symmetry
newtonian-gravity
cosmology
observable-universe
Difference between causal horizon and particle horizon
June 13th, 2022
cosmology
observable-universe
cosmological-inflation
universe
Total positive energy in the (observable) universe
June 16th, 2022
universe
energy
observable-universe
data
astronomy
How far away is Cosmic Background Radiation?
September 12th, 2020
cosmology
big-bang
observable-universe
cosmic-microwave-background