Nautički sumrak

The time when the Sun is 12-18 degrees below the horizon. When the Sun moves from 19 to 18 degrees below the horizon, astronomers can begin to detect an increase in the brightness ...

astronomski sumrak

فضاء; رحلة الفضاء

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

građanski sumrak

فضاء; رحلة الفضاء

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

neidentifikovani leteći objekat (NLO)

فضاء; رحلة الفضاء

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 ...

svemirski šatl

فضاء; رحلة الفضاء

A reusable spacecraft with wings developed by the U.S. National Aeronautics and Space Administration (NASA) for human spaceflight missions. The first test flight took place in ...

zenit

فضاء; رحلة الفضاء

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

x-zrak

فضاء; رحلة الفضاء

Electromagnetic radiation in the neighborhood of 100 picometer wavelength.

x-dijapazon

فضاء; رحلة الفضاء

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

težina

فضاء; رحلة الفضاء

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.