December 16, 2007 Issue

Physics To Go 39 - Earth & moon/dust glow

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Physics in Your World

Zodiacal Light image
image credit: Dominic Cantin; image source; larger image

Zodiacal Light

The faint glow in the sky is the zodiacal light, caused by scattering of sunlight from dust particles orbiting the sun. To find out how extraordinarily far apart these dust particles are, see Zodiacal light and the Gegenshein.

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Physics at Home

Curious About Astronomy?

Got a question about astronomy? Click on Curious about Astronomy?.

There's lots of webpages at this site with text and images about the planets, stars, and the universe. Perhaps best of all, you can ask a question directly to a Cornell astronomer. You can even see the archives of past questions and answers.


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From Physics Research

A Long Way from Home image
image credit: NASA; image source; larger image

A Long Way from Home

This is the first image ever captured that shows the Earth and moon in the same frame. For an image captured from beyond Saturn, and containing Earth, the moon, and Saturn, see Pale Blue Orb.


Worth a Look

Zodiacal Light

For more on the zodiacal light, see Zodiacal Light. To see sunlight reflected from solar system dust 180° from the direction of the sun, visit APOD's The Gegenshein.


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