How to Search for Exoplanets in our Universe - How Did the Universe Begin Documentary
Though Earth was neatly orbiting the Sun as a rocky mass four and a half billion years ago, no organism could survive there. Radiation from the recent supernova kept the planet extremely hot, its surface molten, and oxygen was non-existent. Plus, incredibly massive meteorites and asteroids frequently slammed onto the surface — creating even more heat.
The Earth got so hot, it began melting. Heavier material sank to the bottom, lighter stuff rose to the top. Some elements evaporated. This transformation created the Earth's layered core and mantle, crust, and atmosphere.
Even today the Earth undergoes constant change. Shifting, sliding, and colliding tectonic plates "surf" atop its semi-molten mantle. This relentless drifting speeds along at the rate of fingernail growth, yet causes mountains to rise, volcanoes to erupt, and earthquakes to strike.
Видео How to Search for Exoplanets in our Universe - How Did the Universe Begin Documentary канала Touch Your Heart
The Earth got so hot, it began melting. Heavier material sank to the bottom, lighter stuff rose to the top. Some elements evaporated. This transformation created the Earth's layered core and mantle, crust, and atmosphere.
Even today the Earth undergoes constant change. Shifting, sliding, and colliding tectonic plates "surf" atop its semi-molten mantle. This relentless drifting speeds along at the rate of fingernail growth, yet causes mountains to rise, volcanoes to erupt, and earthquakes to strike.
Видео How to Search for Exoplanets in our Universe - How Did the Universe Begin Documentary канала Touch Your Heart
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