Corona

Corona

The outermost layer of the sun´s atmosphere which is extremely hot, up to 1-1.5 million degrees centigrade, and is the source of solar winds. The corona is only visible to the naked eye during a total solar eclipse. It can also be observed through special optical philtres and X-ray cameras aboard satellites.

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Industry/Domain: Astronomy
Category: General astronomy; Solar system
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corona

Materials science; Material physics

The outermost part of a star's atmosphere, characterized by higher temperatures and lower densities relative to the stellar photosphere.

corona

Environment; Radiation hazards

The outer layer of thin and extremely hot gas that surrounds the sun and other stars. It is only visible during a total eclipse of the sun.

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Engineering; Electronic engineering

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The edge of the glans of the penis.

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Astronomy; General astronomy

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panspermia

Astronomy; General astronomy

The theory that life spreads throughout the universe as DNA which travels via meteors. It implies that life on earth was seeded from a different planet. The theory is not held in ...

elongation

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 ...

declination

Astronomy; General astronomy

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ecliptic

Astronomy; General astronomy

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delta

Astronomy; General astronomy

The upper-case Greek letter used to denote an object's geocentric distance in ephemeris tables; see "ephemeris". (Note that lower-case delta is used to denote declination.)

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