Orbit

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We note that little Elsa has not only escaped gym class but also Earth's orbit. Apparently, perennial truant Saturn has decided to tag along.

Orbiting is the act of going round and round something else. Easy, is it not?

At least it used to be, before Isaac Newton stuck his nose where it didn't belong. Instead of travelling in simple circles, planets, moons, satellites and disposable plastic dishware now had to travel in ellipses. No, not an ellipsis (...), which would have been even simpler, but an ellipse. So this social justice warrior Newton made everything follow an elliptical path or else you were out of the club. Clever swine.

So what keeps these orbiting things orbiting? It's not crystalline spheres because now those are completely illegal. Somehow planets and suchlike are kept in place because of gravity acting against their fasticity that wants to make them fly out of their orbital path and into the dark recesses of the dark recesses.

Think that staying in orbit is child's play? Try this experiment. Find your little brother or sister or any handy small child. Grab their arms and start spinning them round and round, faster and faster. The kid's going to like this, no problems. Remember to shuffle your feet a bit to make an ellipse and not a circle. Eventually, you will begin to tire and let go, sending your co-experimenter flying into the neighbour's yard or window. You might try this again with the chewing gum with the 'orbit' name. It won't help, but it is a good test of whether you can run and chew gum at the same time whilst escaping your angry neighbour when you fling yet another kid onto their property.