Jump to content

Dusk

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Eep² (talk | contribs) at 06:59, 29 June 2007 (otheruses). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Dusk in Breaux Bridge, Louisiana, USA.
Dusk outside a plane on cruise.
For other uses, see Dusk (disambiguation).

Dusk or civil dusk is the time at which the sun is 6 degrees below the horizon in the evening. At this time objects are distinguishable and some stars and planets are visible to the naked eye.[1]

Nautical dusk is 12 degrees below the horizon in the evening. At this time, objects are no longer distinguishable, and the horizon is no longer visible to the naked eye.[1]

Astronomical dusk is the time at which the sun is 18 degrees below the horizon in the evening. At this time the sun no longer illuminates the sky.[1]

Dusk should not be confused with sunset, which is the moment when the trailing edge of the Sun itself sinks below the horizon.[1]

References

  1. ^ a b c d Astronomical Terms at National Oceanic and Atmospheric Administration

See also

Retrieved from "https://en.wikipedia.org/w/index.php?title=Dusk&oldid=141343139"