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Crash Course Astronomy

Stars: Crash Course Astronomy #26

Video duration: 10:40

Today PhilÕs explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots starsÕ luminosity versus temperature, and most stars fall along the main sequence, where they live most of their lives.

Episodes of Crash Course Astronomy46

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Crash Course Astronomy

Life in the Universe: Crash Course Astronomy #46

Phil gives the course a send off with a look at some of his favorite topics.

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Life in the Universe: Crash Course Astronomy #46

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Crash Course Astronomy

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Our Universe’s days are numbered.

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Deep Time: Crash Course Astronomy #45

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Crash Course Astronomy

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Thanks to the wonders of physics, we can map a timeline of the universe’s history.

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A Brief History of the Universe: Crash Course Astronomy #44

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Video thumbnail: Crash Course Astronomy Dark Energy, Cosmology part 2: Crash Course Astronomy #43

Crash Course Astronomy

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Most of the universe is made up of a mysterious entity that pervades space: dark energy.

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Dark Energy, Cosmology part 2: Crash Course Astronomy #43

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