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Hey people! Its me, athena92, writing about science for the first time! My
teacher, remaining nameless, has made learning about outer space probably the
most boring thing ever, and I have decided to make you suffer as well as me!
Just kidding! My teacher has actually made it quite interesting, and I have
actually learned something! *gasp*
I am here to talk about the planets movement, which I find rather fascinating.
The first thing we learned was...
An object at rest wants to stay at rest, and remains at rest until some force
makes it move (pushing it). An object that is in motion wants to stay in motion,
and remains in motion until some force makes it stop (friction). I know this may
sound a bit pointless at first, but it's what the teacher says.
Also, an object that's moving will keep going in a straight line, unless something
keeps it from doing so. This is called inertia.
And gravity... everyone knows this. It's the force by which an object pulls
another object toward its center.
OK, let's get started with the real stuff! The reason that a planet
revolves around the sun (in an elongated, roundish shape) is because of inertia
and gravity. In a way, they are working together. The sun has gravity, too, and
pulls all the planets toward it. Inertia makes the planets want to go straight.
Combined, all this causes planets to orbit the sun in a roundish movement.
So... I hope I explained this well enough. TTFN!
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