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Crash Course Astronomy
Dark Energy, Cosmology part 2: Crash Course Astronomy #43
Most of the universe is made up of a mysterious entity that pervades space: dark energy.
Low Mass Stars: Crash Course Astronomy #29
Welcome to school without the classroom! Join host Phil Plait and discover everything there is to know about the cosmos.
Low Mass Stars: Crash Course Astronomy #29
Season 1 Episode 29 | 12m 2s
Today we are talking about the life -- and death -- of stars. Low mass stars live a long time, fusing all their hydrogen into helium over a trillion years. More massive stars like the Sun live shorter lives. They fuse hydrogen into helium, and eventually helium into carbon. When this happens they expand, get brighter, and cool off, becoming red giants.
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