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Astronomy High School - Essay Example

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Astronomy High School

G is the gravitational constant equal to 6.673 1011 Nm2kg-2. For example, the attraction between you and the Earth is equal to your mass times Earth's mass divided by the distance from your center to Earth's center times G.
Next, we must better understand orbits. Kepler's law of planetary motion states that the orbits of the planets are ellipses around the sun (Wallin). So, at different times they are at different distances. Because they are at different distances, the force between them differs depending on where they are in relation to one another. That being true, their accelerations also differ depending on where they are in their orbits. It seems the inner planets and moons are just the right distances from one another that they help each other sustain non-eroding orbits.
This is why Mercury, Venus, and the Moon do not show significant erosion of their orbits. They are in perpetual free fall, but at such a distance from one another and the sun that their orbits are not circular. They speed up and slow down based on their distances from each other and the sun; therefore, these accelerations keep them from falling into one another. ...Show more

Summary

Did you know that everything is attracted to everything else in the cosmos When an object is orbiting around another object it is actually fall around the object. That's right. It's perpetually falling, but never actually hitting it. Over a period of time, gravity takes its toll and little by little distance between the orbiter and orbited decreases until they finally meet…
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Astronomy High School Essay essay example
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