Aviation dictionary. 2014.
parallax — parallactic /par euh lak tik/, adj. parallactically, adv. /par euh laks /, n. 1. the apparent displacement of an observed object due to a change in the position of the observer. 2. Astron. the apparent angular displacement of a celestial body due … Universalium
Parallax — For other uses, see Parallax (disambiguation). A simplified illustration of the parallax of an object against a distant background due to a perspective shift. When viewed from Viewpoint A , the object appears to be in front of the blue square.… … Wikipedia
Celestial pole — The north and south celestial poles and their relation to axis of rotation, plane of orbit and axial tilt … Wikipedia
sensible horizon — The circle of a celestial sphere formed by its intersection with the plane through the eye of the observer and perpendicular to the local vertical. See parallax in celestial altitude … Aviation dictionary
Hipparchus — (Greek polytonic|Ἵππαρχος; ca. 190 BC ndash; ca. 120 BC) was a Greek astronomer, geographer, and mathematician of the Hellenistic period.Hipparchus was born in Nicaea (now Iznik, Turkey), and probably died on the island of Rhodes. He is known to… … Wikipedia
Tycho Brahe — This article is about the astronomer Tycho Brahe. For other uses, see Tycho Brahe (disambiguation). Tycho Ottesen Brahe Born 14 December 1546 Knutstorp Castle, Scania Died 24 October 1601 (age … Wikipedia
Alhazen — For the Moon crater, see Alhazen (crater). For the asteroid, see 59239 Alhazen. Alhazen Alhazen (Ibn al Haytham) … Wikipedia
Ibn al-Haytham — Infobox Muslim scholars | notability = Muslim scientist| era = Islamic Golden Age| color = #cef2e0 | | image caption = Ibn al Haytham drawing taken from a 1982 Iraqi 10 dinar note. | | name = Unicode|Abū ‘Alī al Ḥasan ibn al Ḥasan ibn al Haytham… … Wikipedia
Astronomy — (from the Greek words astron (ἄστρον), star , and nomos (νόμος), law ) is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth s atmosphere (such as the cosmic… … Wikipedia
List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general … Wikipedia
