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This glossary of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is concerned with the study of celestial objects and phenomena that originate outside the atmosphere of Earth. The field of astronomy features an extensive vocabulary and a ...
This is a partial list of named minor planets, containing all those starting with the letter N, as of 1 July 2024. It is ordered in a case-insensitive, alphabetical manner and contains a total of 730 entries. Grey minor planets have no article and redirect to the list of minor planets instead (see List of minor planets § Main index).
The branch of astronomy that deals with the physics of the Universe, especially with the compositional nature of celestial bodies rather than their positions or motions in space. attenuation coefficient The measure of how much the incident energy beam (e.g. ultrasound or x-rays) is weakened by the material it is passing through. [19] atom
In 2016, the International Astronomical Union (IAU) organized a Working Group on Star Names (WGSN) [2] to catalog and standardize proper names for stars. The WGSN's first bulletin, dated July 2016, [3] included a table of 125 stars comprising the first two batches of names approved by the WGSN (on 30 June and 20 July 2016) together with names of stars adopted by the IAU Executive Committee ...
This list contains acronyms, initialisms, and pseudo-blends that begin with the letter N. For the purposes of this list: acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome , pronounced to rhyme with cars
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The beginning of a pass is termed acquisition of signal; the end of a pass is termed loss of signal. [7] The point at which a spacecraft comes closest to a ground observer is the time of closest approach. [7] Action – In physics, action is an attribute of the dynamics of a physical system from which the equations of motion of the system can ...
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