Second and United States Naval Observatory

Shortcuts: Differences, Similarities, Jaccard Similarity Coefficient, References.

Difference between Second and United States Naval Observatory

Second vs. United States Naval Observatory

The second is the SI base unit of time, commonly understood and historically defined as 1/86,400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each. The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States, with a primary mission to produce Positioning, Navigation and Timing (PNT) for the United States Navy and the United States Department of Defense.

Similarities between Second and United States Naval Observatory

Second and United States Naval Observatory have 3 things in common (in Unionpedia): Atomic clock, Caesium, International Astronomical Union.

Atomic clock

An atomic clock is a clock device that uses an electron transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element.

Atomic clock and Second · Atomic clock and United States Naval Observatory · See more »

Caesium

Caesium (British spelling and IUPAC spelling) or cesium (American spelling) is a chemical element with symbol Cs and atomic number 55.

Caesium and Second · Caesium and United States Naval Observatory · See more »

International Astronomical Union

The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.

International Astronomical Union and Second · International Astronomical Union and United States Naval Observatory · See more »

The list above answers the following questions

What Second and United States Naval Observatory have in common
What are the similarities between Second and United States Naval Observatory

Second and United States Naval Observatory Comparison

Second has 55 relations, while United States Naval Observatory has 94. As they have in common 3, the Jaccard index is 2.01% = 3 / (55 + 94).

References

This article shows the relationship between Second and United States Naval Observatory. To access each article from which the information was extracted, please visit:

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