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it is circumpolar if the body has a declination greater than the co-latitude, that is 90 degrees minus the latitude of the observer
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nearly all heavenly bodies that can observed by the naked eye can be used for navigation.... assuming you can identify the body of course!
Astronomy, the person who studies them is an Astronomer
The term "celestial bodies" refers to all of the objects in space that are identified by name or location: comets, asteroids, moons, rings, planets, stars, nebulas, galaxies, …and any other material structure seen or detected in space. The term "celestial body" is usually not used to refer to meteoroids and small space debris. It does not apply to the individual tiny particles in rings, or to the solar wind, or to any energy phenomena.
Basically anything that is found in outer space. Celestial body or more commonly known as "astronomical objects" are significant physical entities, associations or structures …which science has confirmed to exist in outer space. See link for a list of objects
It revolves the celestial body.
It will either be called a Binary star system, where two stars orbit each other, or a planetary system where non-stellar objects (non-star objects like planets, comets, astero…ids, etc) orbit a star.
Syzygy. Edit: I like that answer. It looks like one those "joke" words people like write on this site, but it's the correct answer. Actually I've only ever seen it used about …the Earth, Sun, and one other body, especially the Moon. "Spell check" doesn't like it.
If you ask me ill answer constellations.star clusters and other unencuded heavenly bodies.
When you are talking about the sun, the earth and the moon, the 3 bodies in alignment is called an eclipse (solar eclipse if the moon is between the earth and the sun and a lu…nar eclipse if the earth is between the moon and the sun). When you are talking about planets then the alignment of 3 bodies is known as a conjunction.
Celestial body is only a general name for an object in the sky, particlarly applied to the night sky (but including the Sun). The moon, stars, planets, etc., are considere…d celestial bodies. Most of them were identified by the ancients; in modern times the more distant planets from Earth were discovered by use of more powerful telescopes.
A celestial body simply refers to an object in space, such as the Moon, the Sun, stars, planets, galaxies, nebulae, etc.
Usually the Moon (Earth's) is said to orbit Earth, although the latter is sometimes not regarded as a celestial body per se. There are also arguments based on the nature o…f the lunar orbit that it is actually co-orbiting the Sun along with the Earth, that Earth and our moon simply share an orbit.
The true shadow where the celestial body completely blocks the light source (such as a total eclipse of the sun as viewed from Earth) is called the umbra. The partial shad…ow, for example if only a part of the limb of the body blocks the sun (like a partial solar eclipse) is called the penumbra.
The moon, Venus once it was Terra-formed, possibly Mercury on the dark side or North-South equator mid-way between Day and Night, Mars, The asteroid belt and any of the moons …of Jupiter, Saturn, Uranus, Neptune, and Pluto and its moon Charon, but that's only in our home system, any number of the stars can have human habitable planets. We'll never know until we find an effective and cheap way to leave our little planet.