79 (number) - Definition and Overview

79 is the natural number following 78 and preceding 80.

In mathematics

Seventy-nine is the 22nd prime number. The next is eighty-three. Seventy-nine is a permutable prime, with ninety-seven.

In science

• The atomic number of gold

In astronomy,

Messier object M79, a magnitude 8.5 globular cluster in the constellation Lepus

The New General Catalogue object (http://www.ngcic.org/) NGC 79, a galaxy in the constellation Andromeda

The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -434 May 21 and ended on 828 June 16. The duration of Saros series 79 was 1262.1 years, and it contained 71 solar eclipses.

The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -150 February 16 and ended on 1166 April 12. The duration of Saros series 79 was 1316.2 years, and it contained 74 lunar eclipses.

In other fields

Seventy-nine is also:

• The designation of Interstate 79, a freeway that runs from West Virginia to Pennsylvania.
• The number of original Star Trek episodes, not counting the first pilot, "The Cage", which was enclosed into "The Menagerie".
• The year AD 79, 79 BC, or 1979.