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Available Formats Crash Course Astronomy Secure Scanned : 04/29/2025 Watch HD Download HD
Crash Course Astronomy

Crash Course Astronomy - Season 1 Episode 21

Crash Course Astronomy 2015 -

Overview:Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also releases dust that forms a different tail. We’ve visited comets up close and found them to be lumpy, with vents in the surface that release the gas as ice sublimates. Eons ago, comets (and asteroids) may have brought a lot of water to Earth -- as well as the ingredients for life.

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First Air Date: Jan 15, 2015 Last Air date: Dec 24, 2015 Season: 1 Season Episode: 46 Episode Runtime: 12:14 minutes Quality: HD IMDb: 3 / 10 by 1 users Popularity: 4.3094 Language: en

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