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спутник, сделанные людьми, которые связаны gravitationaly и на орбите больше физический объект
Industry:Astronomy
На орбите тела Солнечной системы, точка, где тело пересекает плоскости эклиптики с юга на север: для звезды, из плоскости неба к наблюдателю.
Industry:Astronomy
Оптические поверхности с отправлением в форме от идеальной сферы для того, чтобы отменить оптические дефекты или отклонения.
Industry:Astronomy
A sparsely populated grouping (mass range 102-103 Msun) of very young, massive stars lying along a spiral arm of the Milky Way, whose spectral types or motions in the sky indicate a common origin. The star density is insufficient for gravitation to hold the group together against shear by differential galactic rotation, but the stars have not yet had time to disperse completely. OB associations are composed of stars of spectral types O-B2; T associations have many young T Tauri stars. The internationally approved designation for associations is the name of the constellation followed by an arabic numeral - e.g., Perseus OB2.
Industry:Astronomy
a group of bright stars which form a conspicuous pattern on the celestial sphere
Industry:Astronomy
Also called planetoids or minor planets, the asteroids are tiny planets most of which orbit the Sun between Mars and Jupiter. The largest - and the first discovered - is Ceres, with a diameter of 1,003 km. It is estimated that there may altogether be no fewer than 40000. A few have very elliptical orbits and cross the orbits of several other (major) planets. One or two even have their own satellites (moons.)
Industry:Astronomy
Область пространства, лежащих между Марс (1.5 AU) и Юпитер (5.2 AU), где находятся подавляющее большинство астероидов. Ни один из астероидов пояса имеют ретроградное движение.
Industry:Astronomy
1) Divination using the positions of the planets, the Sun and the Moon as seen against the stars in the constellations of the zodiac - a "science" almost as old as homo sapiens. Although at one stage in history astrology and astronomy were almost synonymous- the latter has advanced so far during the last three centuries that the two now bear little relation to each other.
2) The belief that human affairs and people's personalities and characters are influenced by (or encoded in) the positions of the planets.
Industry:Astronomy
Ветвь астрономии, которая занимается измерения положения небесных объектов, особенно звезд. Astrometrists измерения параллаксы и собственное движение, которые позволяют астрономам определить расстояния и скорости звезд.
Industry:Astronomy
