Flash Cards

Lesson 6 The Expanding Universe

Term Definition
Big Bang the initial explosion that resulted in the formation and expansion of the universe
Hubble's Law the observation that the farther away a galaxy is, the faster it is moving away
Cosmic background radiation the electromagnetic radiation left over from the big bang
Dark Matter matter that does not give off electromagnetic radiation but is quite abundant in the universe
Dark Energy a mysterious force that appears to be causing the expansion of the universe to accelerate

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