Astronomy Chapter 18 Flashcard

(cosmology) the cosmic explosion that is hypothesized to have marked the origin of the universe Theory of creation of Universe by instant expansion of an extremely small piece of matter of extremely high density and temperature

The redshift we see from distant galaxies, caused by the fact that expansion of the universe stretches all the photons within it to longer, redder wavelengths.

is a hypothetical form of energy that permeates all of space and tends to accelerate the expansion of the universe.[1] Dark energy is the most accepted theory to explain recent observations that the universe appears to be expanding at an accelerating rate

ways that elementary particles interact with one another, Gravity, Electromagnetic Force, Strong and Weak Nuclear Force

supports big bang because the universe is still expanding and growing. red-shift, other galaxies are moving away from us quickly

superclusters, clusters, galaxy groups, and subsequently into galaxies. At a relatively smaller scale, we know that galaxies are made up of stars and their constituents, our own Solar System being one of them