| Term | Definition |
|---|
| umbra | the region of shadow that is totally shaded |
| penumbra | The portion of a shadow that is only partially |
| penumbral lunar eclipse | A lunar eclipse in which the moon enters the penumbra of Earth;s shadow but does not reach the umbra |
| solar eclipse | the event that occurs when the moon passes directly between Earth and the sun, blocking your view of the sun. |
| Sidereal Period | the period of rotation or revolution of an astronomical body relative to the stars |
| Path of Totality | the track of the moon's umbral shadow over Earth's surface. The sun is totally eclipsed as seen from within this path |
| total solar eclipse | a solar eclipse in which the moon completely enters the Earth's dark shadow |
| partial solar eclipse | a solar eclipse in which the moon does not completely cover the sun |
| photosphere | the bright visible surface of the sun |
| corona | the faint outer atmosphere of the sun composed of low density very hot ionized gas. On venus round networks of fractures and ridges of up 1000 km in diameter |
| prominences | Eruption on the solar surface visible during total solar eclipses |
| diamond ring effect | a momentary phenomenon seen during some total solar eclipses when the ring of the corona and a bright spot of photosphere resemble a large diamond set in a silvery ring |
| nodes | a point where an object's orbit passes through the plane of Earths orbit |
| chromosphere | Bright gases just above the photosphere of the sun |
Combine with other sets
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