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Crash Course Astronomy
Dark Energy, Cosmology part 2: Crash Course Astronomy #43
Season 1
Episode 43
The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the Universe will expand forever, even as our view of it shrinks while space expands faster all the time.
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Phil looks at how gravity plays out across the universe.
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Today Phil explains how telescopes work
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Get to know host Phil Plait and begin with answering a simple question: what is astronomy?