precessional movement

См. также в других словарях:

• Precessional — Pre*ces sion*al, a. Of or pertaining to pression; as, the precessional movement of the equinoxes. [1913 Webster] …   The Collaborative International Dictionary of English

• precessional — shənəlˌ shnəl adjective : of or relating to precession precessional movement …   Useful english dictionary

• precessional — precession ► NOUN 1) the slow movement of the axis of a spinning body around another axis. 2) Astronomy the slow retrograde motion of the equinoctial points along the ecliptic, resulting in the earlier occurrence of equinoxes each year.… …   English terms dictionary

• astronomical map — Introduction       any cartographic representation of the stars, galaxies, or surfaces of the planets and the Moon. Modern maps of this kind are based on a coordinate system analagous to geographic latitude and longitude. In most cases, modern… …   Universalium

• Precession — For other uses, see Precession (disambiguation). Precession of a gyroscope Precession is a change in the orientation of the rotation axis of a rotating body. It can be defined as a change in direction of the rotation axis in which the second… …   Wikipedia

• Milankovitch cycles — Past and future Milankovitch cycles. VSOP allows prediction of past and future orbital parameters with great accuracy. ε is obliquity (axial tilt). e is eccentricity. ϖ is longitude of perihelion. esin(ϖ) is the precession index, which together… …   Wikipedia

• Cosmology in medieval Islam — Islamic cosmology refers to cosmology in Islamic societies. It is mainly derived from the Qur an, Hadith, Sunnah, and current Islamic as well as other pre Islamic sources. The Qur an itself mentions seven heavens[1] and a vast universe sustained… …   Wikipedia

• Timeline of astronomy — Timeline of astronomy2500 BCMany ancient sites are thought to have astronomical significance, such as the Ancient Egyptian pyramids, Harappan shell instruments, British megaliths, and buildings in China and Latin America.In Lothal, the ancient… …   Wikipedia

• Astrometry — is the branch of astronomy that relates to precise measurements and explanations of the positions and movements of stars and other celestial bodies. Although once thought of as an esoteric field with little useful application for the… …   Wikipedia

• Timeline of solar system astronomy — Timeline of solar system astronomyAntiquity* 2137 BC, October 22 Chinese astronomers record a solar eclipse *ca. 2000 BC Chinese determine that Jupiter needs 12 years to complete one revolution of its orbit. * 2nd millennium BC earliest possible… …   Wikipedia

• Timeline of solar astronomy — 9th century * 850 Ahmad ibn Muhammad ibn Kathīr al Farghānī (Alfraganus) gives values for the obliquity of the ecliptic, the precessional movement of the apogees of the Sun 10th century * 900 929 Muhammad ibn Jābir al Harrānī al Battānī… …   Wikipedia