Why's the moon visible during the day?

July 23, 2008 10:43:08 AM PDT
Sometimes we can see the moon during the day, but not always.

Erica's Answer:

The moon's movement doesn't match up with the movement of the sun, because Earth is a satellite of the Sun, and the Moon is a satellite of Earth! They move completely independently of each other. So if the moonrise happens during the day, there's a chance you'll be able to see it before sunset!

Sometimes, on a cloud-free day when the sun is especially bright, you'll see the moon during the day. The air has to be pretty clear in order for the moon to be visible in daylight. That means low humidity, and a lack of particulate matter, such as dust.

The moonrise and moon set times can be found on the National Weather Service's website (www.weather.gov/phl).

- Erica


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