Today's Astronomy Picture of the Day shows a waning last quarter Moon. The terminator (the line between day and night) shows the jagged surface into sharp detail thanks to shadows. Is the Moon grey? Is the Moon white? Look carefully and you'll see a variety of colors in this image.
Is the Moon a boring object in the night sky? Not at all! It's a great target for the backyard amateur. As the level of light changes, different details appear and change. The Moon "rocks" slightly, so from time to time you'll see objects on the edge (or limb) that are normally hidden. Give it a try!
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