84 (Number)

In mathematics

In science

• The atomic number of polonium

• Messier object M84, a magnitude 11.0 lenticular galaxy in the constellation Virgo
• The New General Catalogue object NGC 84, a single star in the constellation Andromeda
• The Saros number of
• the solar eclipse series which began on -181 April 14 and ended on 1099 May 22. The duration of Saros series 84 was 1280.1 years, and it contained 72 solar eclipses.
• the lunar eclipse series which began on -96 September 13 and ended on 1401 February 28. The duration of Saros series 84 was 1496.5 years, and it contained 84 lunar eclipses.

In other fields

• the model number of AGM-84 Harpoon
• WGS 84
• the house number of 84 Avenue Foch
• the number of the French department Vaucluse
• the designation of Interstate 84, two Interstate Highways that run from Oregon to Utah and from Pennsylvania to Massachusetts.
• the code for international direct dial phone calls to Vietnam
• a town in Pennsylvania: Eighty Four, named after the Eighty Four Lumber company
• The ISBN Group Identifier for books published in Spain
• The year AD 84, 84 BC, or 1984.

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