- hour-angle scale
- шкала часовых углов (астрокомпаса)
Англо-русский словарь по гражданской авиации. — М.: Скорпион-Россия. В.П. Марасанов. 1996.
Англо-русский словарь по гражданской авиации. — М.: Скорпион-Россия. В.П. Марасанов. 1996.
hour circle — Astron. a great circle on the celestial sphere passing through the celestial poles and containing a point on the celestial sphere, as a star or the vernal equinox. Also called circle of declination. [1665 75] * * * ▪ astronomy in astronomy … Universalium
Right angle — In geometry and trigonometry, a right angle is an angle of 90 degrees, corresponding to a quarter turn (that is, a quarter of a full circle). It can be defined as the angle such that twice that angle amounts to a half turn, or 180° [Lindahl, G.… … Wikipedia
Full Scale 30- by 60-Foot Tunnel — Infobox nrhp name = Full Scale Wind Tunnel nrhp type = nhl caption = Open test section of the Full Scale Wind Tunnel lat degrees = 37 lat minutes = 4 lat seconds = 51 lat direction = N long degrees = 76 long minutes = 20 long seconds = 30 long… … Wikipedia
Solar time — On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant … Wikipedia
Equinox — This article is about the astronomical event when the sun is at zenith over the Equator. For other uses, see Equinox (disambiguation). For the same event happening on other planets and setting up a celestial coordinate system, see Equinox… … Wikipedia
Tide — This article is about tides in the Earth s oceans. For other uses, see Tide (disambiguation). Tidal redirects here. For other uses, see Tidal (disambiguation). High Tide redirects here. For other uses, see High Tide (disambiguation) … Wikipedia
List of selected stars for navigation — The selected stars for navigation are often used for sextant observations. Fifty eight selected navigational stars are given a special status in the field of celestial navigation. Of the approximately 6,000 stars visible to the naked eye under… … Wikipedia
Su Song — 蘇頌 (Sū Sòng) Born 1020 near Quanzhou Died 1101 (aged 80–81) Nationality Chinese … Wikipedia
Celestial coordinate system — For other uses of Celestial , see Celestial (disambiguation). Orientation of Astronomical Coordinates Orientation of the galactic, ecliptic and equatorial coordinate systems, projected on the celestial sphere, showing the galactic equator (black) … Wikipedia
Astrocompass — An astrocompass is a navigational tool for determining the direction of north through the positions of various astronomical bodies.There are certain circumstances when magnetic compasses and gyrocompasses are unreliable. The most obvious is in… … Wikipedia
Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… … Wikipedia