Cosmology vocabulary quizlet

What does the cosmological principle allow cosmologists to assume quizlet?
At any given time, the distribution of matter is the same everywhere in space, and the universe looks the same in all directions.
The cosmological principle is important because it lets us assume that the small portion of space we can see is truly representative of all the rest of the universe that we cannot see..
What is meant in cosmology by critical density quizlet?
The state of the universe if its total mass and energy density is exactly equal to a specific value, called critical density.
Critical Density.
The average mass and energy density of the universe at which space would be flat.
It is equal to about 5.5 hydrogen atoms per cubic meter of space..
What is the physical science dealing with the universe called?
Cosmology studies how the history of the universe led to the stars, galaxies, and other features we can observe today.
Image courtesy of Dark Energy Spectroscopic Instrument, Lawrence Berkely National Laboratory.
Cosmology is the study of the origin, development, structure, history, and future of the entire universe..

What does the cosmological principle allow cosmologists to assume quizlet?