{"id":13453,"date":"2024-11-22T17:05:49","date_gmt":"2024-11-22T17:05:49","guid":{"rendered":"https:\/\/topat10.com\/?p=13453"},"modified":"2024-11-22T17:05:49","modified_gmt":"2024-11-22T17:05:49","slug":"why-is-it-so-tricky-to-show-the-sun-earth-and-moon-in-a-diagram","status":"publish","type":"post","link":"https:\/\/topat10.com\/?p=13453","title":{"rendered":"Why Is It So Tricky to Show the Sun, Earth, and Moon in a Diagram?"},"content":{"rendered":"


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Earth, sun, moon: three objects in space whose interactions have a pretty big impact on our lives. Earth orbits the sun once a year, and it rotates on its axis about once a day (depending on your definition of \u201crotate\u201d). This gives us the night-day sequence and the yearly cycle of the seasons.<\/p>\n

The moon’s gravitational tug influences the tides. On a monthly cycle, we can also see the phases of the moon, which are caused by the relative positions of these three orbs. A full moon makes it possible to see at night. Before electric lights, this was a big deal.<\/p>\n

You can see how these interactions structure our whole idea of time. So if you were writing a science textbook, you’d want to include an illustration of the Earth-sun-moon system, right? But guess what, you can’t. The distances and differences in size make it practically impossible.<\/p>\n

Let’s say we want to build a model of the sun and Earth alone. Earth has a radius of about 6,371 kilometers (3,959 miles), but let’s represent this with a marble 1 centimeter in diameter. To keep things in scale, I’d have to use a giant beach ball for the sun\u2014the kind people knock around at rock concerts\u2014more than a meter in diameter. You could fit 1.3 million marbles into it.<\/p>\n

But wait! It gets worse. That beach ball would also have to be 117 meters away. That’s longer than a football field. Now try to take a picture of the ball and the marble. Good luck with that.<\/p>\n

Modeling the Earth and moon would be easier. If we use that marble for the moon, Earth would be a tennis ball, with a diameter of 6.7 centimeters. Now for the fun part. How far apart do you think we should put them? Take a guess. You’ll probably be wrong because we never see the Earth and moon together. The answer is 2 meters. Here’s what that would look like:<\/p>\n

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