Sistemi aplanatik

Sistemi aplanatik

A system of three lenses which, taken together, correct for spherical aberration, chromatic aberration, and coma.

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품사: 명사
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분야/도메인: 천문학
카테고리: 일반 천문학
Company: Caltech
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vit julian

천문학; 일반 천문학

Exactly 365. 25 days, in which a century (100 years) is exactly 36525 days and in which 1900. 0 corresponds exactly to 1900 January 0. 5 (from the Julian-date system, which is ...

heliocentrik

천문학; 일반 천문학

Referring to the sun. A heliocentric orbit is one based on the sun as one of the two foci of the (elliptical) orbit (or as the center of a circular orbit); a heliocentric ...

datë juliane

천문학; 일반 천문학

The interval of time in days (and fraction of a day) since Greenwich noon on Jan. 1, 4713 BC. The JD is always half a day off from Universal Time, because the current definition ...

ekuinoks

천문학; 일반 천문학

Either of the two points (vernal, autumnal) on the celestial sphere where the ecliptic (which is the apparent path of the sun on the sky) intersects the celestial equator. Due to ...

shtrirje

천문학; 일반 천문학

Angular distance of a celestial object from the sun in the sky. In standard ephemerides, this is usually denoted by the Greek letter epsilon (or by the abbreviation "Elong. "). A ...

pjerrësi

천문학; 일반 천문학

One element of the astronomical coordinate system on the sky that is used by astronomers. Declination, which can be thought of as latitude on the earth projected onto the sky, is ...

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Adam Young

American musician who founded the band, Owl City, via MySpace. He was signed onto Universal Republic record company in 2009. Before signing on with ...