High Quality Content by WIKIPEDIA articles! Geocentric coordinates are an Earth-centered system of locating objects in the solar system in three-dimensions along the Cartesian X, Y and Z axes. They are differentiated from topocentric coordinates which use the observer's location as the reference point for bearings in altitude and azimuth. Both systems, however, share a common difficulty in that the Earth is constantly moving, which requires the addition of a time component to fix objects. For...
High Quality Content by WIKIPEDIA articles! Geocentric coordinates are an Earth-centered system of locating objects in the solar system in three-dimensions along the Cartesian X, Y and Z axes. They are differentiated from topocentric coordinates which use the observer's location as the reference point for bearings in altitude and azimuth. Both systems, however, share a common difficulty in that the Earth is constantly moving, which requires the addition of a time component to fix objects. For nearby stars astronomers use heliocentric coordinates, with the center of the Sun as the origin. The reference plane can either be aligned with the Earth's equator, the plane of the ecliptic or the plane of the Milky Way galaxy. The distances involved are so great compared to the relative velocities of the stars that for most purposes the time component can be neglected.
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Эта книга - библия для тех, кто только начал осваивать искусство приготовления пищи дома. Для тех, кто еще теряется в наименованиях кухонных гаджетов и не знает, что обжаривать сначала, лук или морковь? Для тех, кто очень хочет научиться прекрасно готовить, чтобы потом вкусно есть!
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