Archives: Glossary Terms: 691 terms

Unit of ratio equal to ten decibels. Named in honor of telecommunications pioneer Alexander Graham Bell.

A modulation scheme in which data symbols are represented by a shift from one phase to another. See Chapter 10.

The theory that suggests that the universe was formed from a single point in space during a cataclysmic explosion about ...

In the U.S., 10. In other countries using SI, 10.

A system of two stars that revolve around a common center of gravity.

A concentration of mass so dense that nothing not even light can escape its gravitational pull once swallowed up. Many ...

A term used to describe an extra new that occurs in a season. It usually refers to the third new ...

A term used to describe an extra full that occurs in a season. It usually refers to the third full ...

A shift in the lines of an object's spectrum toward the blue end. Blueshift indicates that an object is moving ...

A term used to describe an exceptionally bright meteor. Bolides typically will produce a sonic boom.