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The branch of astronomy that employs principles of physics and chemistry to determine the nature of astronomical objects and phenomena, examining properties such as luminosity, density, temperature, and chemical composition (rather than the positions or motions of objects in space, which is more specifically the emphasis of celestial mechanics).
Astronomical events are celestial body events such as eclipses, novae or planetary collisions studied by the scientific discipline of astronomy, whereas "astronomy events" refers to social events such as academic meetings, conferences and other such newsworthy occasions relating to astronomy.
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets.
Phenomena associated with stars and space. For those phenomena specifically associated with the Earth's Sun, see Category:Solar phenomena. Subcategories.
ZAHB – (celestial object) "zero-age" horizontal branch, horizontal branch stars that have just begun burning helium in their cores and hydrogen in a shell around the cores; ZAMS – (celestial object) zero age main sequence, a star that has just become a main-sequence star (i.e. a star that has begun burning hydrogen in its core)
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.
Astronomy – studies the universe beyond Earth, including its formation and development, and the evolution, physics, chemistry, meteorology, and motion of celestial objects (such as galaxies, planets, etc.) and phenomena that originate outside the atmosphere of Earth (such as the cosmic background radiation).
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. Astronomy may also refer to: Music. Albums. ...