The Outer Planets: the Moving Planets

The video explains the historical misconception that the sun orbited the earth and how astronomers proved that planets, including Earth, orbit the sun in elliptical paths. It describes the concept of revolution, the time it takes for a planet to orbit the sun, and rotation, the spinning of planets on their axes. Earth takes about 365 days for a revolution and 24 hours for a rotation, which causes day and night. The video also mentions the varying revolution periods of other planets, like Pluto, which takes 248 years.

What is the term used to describe the time it takes for a planet to make a complete trip around the sun?

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What phenomenon is responsible for day and night on Earth?

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