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physical phenomena > event > celestial event |
celestial event comparison table |
Subject | has unit | has definition | is part of | occurs on | produce | has value | has location | has elongation | is a kind of | has period |
---|---|---|---|---|---|---|---|---|---|---|
aurora | 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. | ionosphere | the ionosphere in the polar regions of a planet | celestial event | ||||||
impact event | The collision of two celestial bodies | a crater | celestial event | |||||||
periodic celestial event | Celestial event which occurs with a very regular period | celestial event | ||||||||
planetary elongation event | angle unit | A point in the orbit of a celestial body with a specific planetary elongation such as 0°, 90° or 180° | planetary elongation | |||||||
solar event | Sun | celestial event |
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