What is sun?

  • (noun): The rays of the sun.
    Example: "The shingles were weathered by the sun and wind"
    Synonyms: sunlight, sunshine
    See also — Additional definitions below


The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields. It has a diameter of about 1,392,684 km, about 109 times that of Earth, and its mass (about 2×1030 kilograms, 330,000 times that of Earth) accounts for about 99.86% of the total mass of the Solar System. Chemically, about three quarters of the Sun's mass consists of hydrogen, while the rest is mostly helium. The remainder (1.69%, which nonetheless equals 5,628 times the mass of Earth) consists of heavier elements, including oxygen, carbon, neon and iron, among others.

Read more about Sun.

Some articles on sun:

Sun - Observation and Effects
... The brightness of the sun can cause pain from looking at it with the naked eye, although doing so for brief periods is not hazardous for normal, non-dilated eyes ... Looking directly at the Sun causes phosphene visual artifacts and temporary partial blindness ... exposure to solar UV, not on whether one looks directly at the Sun ...
Ze Rong - Biography - Service Under Liu Yao
... When Liu Yao was engaged in conflict with the rising Sun Ce, Ze Rong served as one of the former's allies, camping near Moling with Xue Li ... They were routed by Sun Ce and forced to retreat, though Ze Rong managed to avoid complete annihilation due to Fan Neng and Yu Mi's hinder on Sun Ce's ... During one battle, Sun Ce suffered an arrow wound and returned to his base at Niuzhu ...
Geocentric Model - Geocentrism and Rival Systems
... both Venus and Mercury went around the Sun rather than the Earth, but this is no longer accepted ... put Mercury and Venus in orbit around the Sun ...
Efnysien - Character Analysis
... the fire, not into it, and therefore the sacrifice actually was a dedication of Gwern to a Sun cult, as Celts worshipped Sun by leaping over fires and ... an onslaught was that Irish did not approve when their prince was kidnapped for the Sun cult ... Thus Virpiranta sees Efnisien as a Sun god and therefore the Welsh equivalent to Esus ...
Yellow Sun
... Yellow Sun was the first British operational high-yield strategic nuclear weapon ... casing the warhead (or physics package) was known as "Green Grass" (in Yellow Sun Mk.1) and "Red Snow" (in Yellow Sun Mk.2) ...

More definitions of "sun":

  • (noun): A typical star that is the source of light and heat for the planets in the solar system.
    Example: "The sun contains 99.85% of the mass in the solar system"
  • (verb): Expose one's body to the sun.
    Synonyms: sunbathe
  • (noun): First day of the week; observed as a day of rest and worship by most Christians.
    Synonyms: Sunday, Lord's Day, Dominicus
  • (noun): A person considered as a source of warmth or energy or glory etc.
  • (noun): Any star around which a planetary system evolves.

Famous quotes containing the word sun:

    A tree is beautiful, but what’s more, it has a right to life; like water, the sun and the stars, it is essential. Life on earth is inconceivable without trees. Forests create climate, climate influences peoples’ character, and so on and so forth. There can be neither civilization nor happiness if forests crash down under the axe, if the climate is harsh and severe, if people are also harsh and severe.... What a terrible future!
    Anton Pavlovich Chekhov (1860–1904)

    The sun of Rome is set. Our day is gone;
    Clouds, dews, and dangers come; our deeds are done.
    William Shakespeare (1564–1616)

    The sun in this month
    begets a headache
    like an angel slapping you in the face.
    Anne Sexton (1928–1974)