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aurora

subject fact

aurora is a part of ionosphere 2001-09-27 09:31:59.0
has location the ionosphere in the polar regions of a planet 2001-09-27 09:30:08.0
has definition the light produced by excited atoms and ions in the upper atmosphere of a planet
has definition Spectacular array of light in the night sky, caused by charged particles from the Sun hitting the Earth's upper atmosphere. The aurora borealis is seen in the north of the Northern hemisphere; the aurora australis in the south of the Southern. has source: Abbot, D. 1984 Astronomers, Peter Bedrick Books, New York, 2001-09-27 09:31:59.0
has definition Light radiated by ions in the Earth's atmosphere, mainly near the geomagnetic poles, stimulated by bombardment by energetic particles ejected from the Sun (see solar wind). Aurorae appear about 2 days after a solar flare and reach their peak about 2 years after sunspot maximum. has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:31:59.0
is a kind of celestial event 2001-09-27 09:30:08.0

event has duration 2001-09-27 09:29:57.0
has synonym world point
has time of occurrence

Kinds of aurora :

aurora australis (3 facts) - an aurora ocurring in the southern hemisphere of the Earth
aurora borealis (3 facts) - an aurora ocurring in the northern hemisphere of the Earth
Jovian aurora (3 facts) - an aurora ocurring on the planet Jupiter

aurora	is a part of ionosphere
	has location the ionosphere in the polar regions of a planet
	has definition the light produced by excited atoms and ions in the upper atmosphere of a planet
	has definition Spectacular array of light in the night sky, caused by charged particles from the Sun hitting the Earth's upper atmosphere. The aurora borealis is seen in the north of the Northern hemisphere; the aurora australis in the south of the Southern.
	has definition Light radiated by ions in the Earth's atmosphere, mainly near the geomagnetic poles, stimulated by bombardment by energetic particles ejected from the Sun (see solar wind). Aurorae appear about 2 days after a solar flare and reach their peak about 2 years after sunspot maximum.
	is a kind of celestial event
event	has duration
	has synonym world point
	has time of occurrence