Science Fair Project Encyclopedia
68 (number)
68 is the natural number following 67 and preceding 69
| Cardinal | sixty-eight |
| Ordinal | 68th (sixty-eighth) |
| Factorization | 
|
| Divisors | 2, 4, 17, 34 |
| Roman numeral | LXVIII |
| Binary | 1000100 |
| Hexadecimal | 44 |
In mathematics
Sixty-eight is a nontotient.
In science
- The atomic number of erbium, a lanthanide
In astronomy,
- Messier object M68, a magnitude 9.0 globular cluster in the constellation Hydra
- The New General Catalogue object NGC 68 , a spiral galaxy in the constellation Andromeda
- The Saros number of the solar eclipse series which began on -626 March 16 and ended on 685 August 20. The duration of Saros series 68 was 1280.1 years, and it contained 72 solar eclipses.
- The Saros number of the lunar eclipse series which began on -613 July 3 and ended on 685 August 20. The duration of Saros series 68 was 1298.1 years, and it contained 73 lunar eclipses.
In other fields
- In degrees Celsius, the ideal temperature for developing black-and-white film.
- The designation of US Interstate 68, a freeway that runs from West Virginia to Maryland.
- The registry of the U.S. Navy's aircraft carrier USS Nimitz (CVN-68), named after Admiral Chester Nimitz.
- The number of the French department Haut-Rhin.
- The year AD 68, 68 BC, or 1968.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details