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Central eclipse is often used as a generic term for a total, annular, or hybrid eclipse. [17] This is, however, not completely correct: the definition of a central eclipse is an eclipse during which the central line of the umbra touches Earth's surface.
A total eclipse occurs when the observer is within the umbra, an annular eclipse when the observer is within the antumbra, and a partial eclipse when the observer is within the penumbra. During a lunar eclipse only the umbra and penumbra are applicable, because the antumbra of the Sun-Earth system lies far beyond the Moon.
Annular Eclipses. Even when the moon does cross in front of the sun at precisely the right equatorial point, a total eclipse is not guaranteed. ... creating what is known as an annular eclipse ...
An alternative definition is that the penumbra is the region where some or all of the light source is obscured (i.e., the umbra is a subset of the penumbra). For example, NASA 's Navigation and Ancillary Information Facility defines that a body in the umbra is also within the penumbra.
“During an annular eclipse, because the surface of the sun is not completely covered, you must wear glasses or view indirectly at all times.” Directly staring at the sun can result in ...
∎ Annular: This type of eclipse is the most commonly seen and is witnessed leading up to a total eclipse. When the moon passes directly between the Earth and the sun, an annual eclipse occurs.
In an annular solar eclipse, the magnitude of the eclipse is the ratio between the apparent angular diameters of the Moon and that of the Sun during the maximum eclipse, yielding a ratio less than 1.0. As the magnitude of eclipse is less than one, the disk of the Moon cannot completely cover the Sun.
The solar eclipse — which will be visible on Oct. 2 — will be an annular eclipse, which doesn't fully cover the sun like a total solar eclipse. According to NASA, an annular solar eclipse ...