Encyclopedia > ZHR

Article Content

Zenithal Hourly Rate

Redirected from ZHR

In astronomy, the Zenithal Hourly Rate (ZHR) of a meteor shower is the number of meteor an observer would see in one hour under a clear, dark sky (limiting apparent magnitude of 6.5) and if the radiant of the shower were in the zenith. The rate which can effectively been seen is always lower and decrease as the radiant is closer to the horizon.

Featured Article

List of closed London Underground stations

... station[?] As are these stations, all of which were at the far end of the Metropolitan Line, and stretch the definition of "tube station" a little: Waddesdon tube ...