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An Introduction to the Moon

An Introduction to the Moon

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In 1969, Neil Armstrong made history by taking "one small step" on the moon as the world watched in awe. The moon has always fascinated people—close enough to see, far enough away to be a mystery, constantly there but constantly changing. The moon has a bearing on the gravitational and tidal science of the earth, and has long played its part in the superstitions and fairy tales of its population.

There's a lot to learn about our constant companion. It's not made of cheese, and there is no man in the moon, but it does hold its own secrets—a unique geography, traces of water, and the legendary dark side of the moon. This playlist will give you an introduction to the night sky's biggest and brightest body.

02:04

Key Facts In This Video

  • 1

    The moon illusion is the optical illusion where the moon appears larger when it is nearer the horizon. (0:11)

  • 2

    The main theory explaining the moon illusion says that the visual reference points near the horizon make the moon look bigger in comparison. (0:43)

  • 3

    By viewing the moon near the horizon upside down, you may be able to beat the moon illusion. (1:32)