Archives: Glossary Terms: 691 terms

A condition found in the region around a magnet or an electric current, characterized by the existence of a detectable ...

Either of two limited regions in a magnet at which the magnet's field is most intense.

The area around a planet most affected by its magnetic field. The boundary of this field is set by the ...

The amount that a telescope enlarges its subject. It's equal to the telescope's focal length divided by the eyepiece's focal ...

A number denoting the brightness of a star or other celestial object. The higher the magnitude, the fainter the object. ...

The area between Mars and Jupiter where most of the asteroids in our solar system are found.

The maximum diameter of an ellipse.

A name used to describe any planet that is considerably larger and more massive than the Earth, and contains large ...

A term used to describe a large, circular plain. The word mare means "sea". On the Moon, the maria are ...

Fourth planet from the sun, a terrestrial planet.