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.
A plasma ball is fun, but plasmas are an important part of our physical universe. From lightning to stars to the Northern Lights, plasmas are all around us.
Read about the basics of plasmas.
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