My watch list  

Waterhole (radio)

The waterhole refers to an especially quiet section of the electromagnetic spectrum between 18 and 21 centimeters. Hydroxyl radiates at 18 centimeters, and hydrogen at 21 centimeters; those two combined form water, and as water is currently thought to be essential to extraterrestrial life advanced enough to generate radio signals, the waterhole is a frequent target of investigation.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Waterhole_(radio)". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE