neidentifikovani leteći objekat (NLO)

neidentifikovani leteći objekat (NLO)

UFOs are unidentified aircraft which are attributed to alien space flight. One supposed UFO halted air traffic at Hangzhou Airport, China, on July 7. The appearance is being investigated by researchers, with no conclusions to date.

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行业/领域：航空航天
类别太空飞行
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航空航天; 太空飞行

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航空航天; 太空飞行

The point on the celestial sphere directly above the observer. Opposite the nadir.

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航空航天; 太空飞行

Electromagnetic radiation in the neighborhood of 100 picometer wavelength.

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航空航天; 太空飞行

A range of microwave radio frequencies in the neighborhood of 8 to 12 ghz.

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The gravitational force exerted on an object of a certain mass. The weight of mass m is mg Newtons, where g is the local acceleration due to a body's gravity.

astronomski sumrak

航空航天; 太空飞行

For technical definition, please follow this link to the U.S. Naval Observatory Astronomical Applications website.

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行业/领域：人物类别运动员

Flojd Mejveder

Born Floyd Sinclair on February 24, 1977, an American professional boxer. He is a five-division world champion, where he won nine world titles in five ...