Celestial mechanics Celestial mechanics Celestial mechanics is the branch of astronomy that deals with the motions of objects in outer space. Historically, celestial mechanics applies principles of physics (classical mechanics) to astronomical objects, such as stars and planets, to produce ephemeris data. As an astronomical field of study, celestial mechanics includes the sub-fields of orbital mechanics, which deals with the launching and orbits artificial satellites, and lunar theory, a specialty which deals with the complications of the orbit of the Moon. Modern celestial mechanics tends to divide between five broad fields of study: All of the above fields overlap, but are sometimes
Celestial monarch habitat leaves its population severely fragmented and its status is vulnerable according to the Red Data Book of Threatened Birds of Asia. Celestial monarch The celestial monarch ("Hypothymis coelestis") is a species of bird in the family Monarchidae, and one of the most attractive of all the monarch flycatchers, with its spectacular blue crest and large yellow eye-ring (neither of which are illustrated in the facing painting). It is endemic to the Philippines. An alternate name for the celestial monarch is the celestial blue monarch. Two subspecies are recognized: Its natural habitat is subtropical or tropical moist lowland forests. This