Solar longitude, commonly abbreviated as Ls, is the ecliptic longitude of the Sun, i.e. the position of the Sun on the celestial sphere along the ecliptic...

Longitude (/ˈlɒndʒɪtjuːd/, AU and UK also /ˈlɒŋɡɪ-/) is a geographic coordinate that specifies the east–west position of a point on the surface of the...

dew") is the 15th solar term. It begins when the Sun reaches the celestial longitude of 165° and ends when it reaches the longitude of 180°. It more often...

mean solar time at 0 degrees longitude (the IERS Reference Meridian). Civil time is based on UT (actually UTC), and civil calendars count mean solar days...

scales were uniform in the sense of mean solar time (i.e., they approximate the mean time of some longitude) and were not adjusted as the rovers traveled...

the Qing Ming and Winter Solstice days, fall on the respective Jie qi (solar terms) in the Agricultural calendar). Traditional holidays are generally...

An annular solar eclipse will occur at the Moon’s descending node of orbit on Wednesday, October 2, 2024, with a magnitude of 0.9326. A solar eclipse occurs...

12 noon apparent solar time and can be observed using a sundial. The local or clock time of solar noon depends on the date, longitude, and time zone, with...

Solar irradiance is the power per unit area (surface power density) received from the Sun in the form of electromagnetic radiation in the wavelength range...

exactly 27 days and starts from February 8, 1832.) The heliographic longitude of a solar feature conventionally refers to its angular distance relative to...