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  • My Very Easy Method Just Speeds Up NamingPlanets.

  • Every Physics classroom has a Solar System line like this.

  • Orlike this. (Sorry, Pluto.)

  • Looking at the line, which planet is closest to Earth: Venus or Mars?

  • To answer, you need first know that, like many things in school, the line is a lie.

  • Planets are not people queuing for coffee, but rather spheroids scattered in space,

  • always in motion, not in simple circles either, but in ellipses at untidy angles.

  • In the cold, dark expanse, this is the coziest Venus gets to Earth,

  • but only about once a year and a half-ish.

  • Starting close, she orbits far, then comes back, needs some space -- on the other side of the sun.

  • This means when Venus is away, Mars can be the closest to play.

  • So because of orbits, there isn’t one answer to, “Who is the closest?”

  • It's really, “Who is mostly the closest?”

  • The mostest closest.

  • When Mars and Venus are both on the other side of the Sun, it leaves little Mercury the closest.

  • Each of Earth’s inner three planet friends are at one time the farthest and the closest.

  • And Mercury, with his smallest orbit, makes him never that far from Earth.

  • At least on planetary scales.

  • Giving the little guy a uniquely close relationship with Terra.

  • In fact, watching the planets spin, because of his small orbit, Mercury, not Mars or Venus, is the closest planet most of the time.

  • Looking at the line, that seems unpossible.

  • But nonetheless, in the way of actual orbits,

  • if we keep measuring the distance to all the planets as they spin,

  • Mercury is Earth's mostest closest neighbor.

  • Which is delightfully unexpected.

  • But wait, if Mercury is the mostest closest to Earth, he has to be the mostest closest to Venus as well, right?

  • Because her orbit is smaller than Earth's.

  • And running the numbers, it's true.

  • Making Earth's special relationship with Mercury less special.

  • But at least this is one time where the line provides the obvious answer.

  • Mercury is closest to Venus.

  • While were here, who is Mars’s mostest closest?

  • On his other side is the asteroid belt, so it should be Earth.

  • But, maybe it's Venus?

  • Maybe the rule is the second closest is the mostest closest.

  • Watching the results, aaaand

  • Oh my Celestia, it's Mercury again.

  • Mercury is the mostest closest to Earth, Venus, and Mars, for the same reason each time.

  • Bigger orbits make farther average distances for longer times.

  • So, mercurial Mercury is the constant-est companion.

  • No, no. It can't be true for Jupiter too.

  • Enormous, far away Jupiter.

  • But, it is!

  • Once again, Mercury’s small orbit means he never goes as far away as the other planets with their bigger orbits.

  • Thus, are you ready for this?

  • The orbital math that shows Mercury is the mostest closest to Jupiter is the same for all the planets and everything that orbits the sun.

  • (You too, Pluto.) [high-five]

  • For each of the planets, Mercury is the mostest closest.

  • [soft ambient music]

My Very Easy Method Just Speeds Up NamingPlanets.

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?どの惑星が一番近い? (? Which Planet is the Closest?)

  • 6 1
    林宜悉 に公開 2021 年 01 月 14 日
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