This photograph represents an instant in time as recorded by the Galileo spacecraft. The Earth and Moon scene appeared on a single frame at a distance of about 2.9 million miles. Toward the bottom of the Moon, the indentation into the bright half is the Aiken Basin. It is believed to be one of the oldest and largest lunar impacts. Credit: NASA.
Glowing, Glowing, Glowing, . . . . Gone?
All kinds of things give off light in a way that is useful to us, either naturally or by design. Some objects are designed to produce bright light to work by, others have just enough of a glow to tell us where things are located in the dark. All of these glows have something in common, they are created from the changes happening to electrons in the atoms that are glowing. Light, whether it is visible, infrared, ultraviolet, or even farther afield, relates to electrons and atoms.