Night Sky With the Naked Eye: How to Find Planets, Constellations, Satellites and Other Night Sky Wonders Without a Telescope by Bob King

Author:Bob King [King, Bob]
Language: eng
Format: azw3
Publisher: Page Street Publishing
Published: 2016-11-07T16:00:00+00:00

Moon Illusion Is All in Your Head

If you’ve ever been surprised by how big a rising (or setting) full moon looks, you’ve got a lot of company. Even as far back as the fourth century B.C., Aristotle noted how much bigger a horizon-hugging moon appeared compared to when viewed overhead. Back then it was attributed to magnification by the atmosphere, but now we know it’s all in our head. Photos of the rising and meridian moons show them as identical in size.

ACTIVITY: To see for yourself, take a sheet of paper and roll it up into a narrow tube. Point it at the rising moon and adjust the tube’s size until it’s a little larger than the moon’s diameter. Tape the tube so its size stays the same and look at the moon again a few hours later when it’s higher in the sky. You’ll see it fills the same space.

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