General astronomy

General astronomy

Contributors in General astronomy

General astronomy

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 half a day different ...

heliosentrisk

Astronomy; General astronomy

Henviser til solen. En heliosentrisk bane er en basert på solen som en av de to fokus på (elliptisk) bane (eller som en sirkulær bane); en heliosentrisk er lysstyrken på et objekt som vil bli sett ...

utryddelse, atmosfæriske

Astronomy; General astronomy

The diminishing of light from astronomical objects due to the earth's atmosphere, in which molecules (air, dust, etc. ) of the atmosphere absorb, reflect, and refract light before it reaches the ...

Equinox

Astronomy; General astronomy

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 precession, this ...

efemeridene tid (ET)

Astronomy; General astronomy

Determined in principle from the sun's apparent annual motion, ET is the numerical measure of uniform time, which is the independent variable in the gravitational theory of the earth's orbital ...

efemeridene

Astronomy; General astronomy

A table listing specific data of a moving object, as a function of time. Ephemerides usually contain right ascension ("R. A. " in these web pages) and declination ("Decl. " in these web pages), ...

forlengelse

Astronomy; General astronomy

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 celestial (usually ...