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Umbra, penumbra i antumbra Usage on ta.wikipedia.org கரு நிழல், அணுகு கரு நிழல் மற்றும் எதிர் கரு நிழல்
Umbra, penumbra and antumbra of Earth and images that could be seen at some points in these areas (Note: the relative size and distance of the bodies shown are not to scale.)“… The Earth’s shadow has two distinct parts,… the UMBRA is the part of the shadow where all direct sunlight is blocked by the Earth; the PENUMBRA of the shadow is ...
English: Diagram showing the umbra, penumbra and antumbra of the shadow of the earth in sunlight. The umbra is the dark inner shadow and the penumbra is the faint outer shadow. The path of totality is the path that is travelled by the umbra and anyone located on it can see the total eclipse.
A hybrid solar eclipse occurs because the earth’s surface is curved, sometimes an eclipse can shift between annular and total eclipse as the moon’s shadow moves across the globe.
English: This diagram explains why the penumbra of a solar eclipse is approximately twice the size of the Moon. Since the Sun and Moon have nearly the same angular diameter, the umbra is reduced to nearly a single point in length. Therefore the three angles marked in red are nearly equal, all with a base equal to the Moon's diameter.
An observer in the antumbra, the area of shadow beyond the umbra, will see an annular eclipse. [20] The Moon's orbit around Earth is inclined at an angle of just over 5 degrees to the plane of Earth's orbit around the Sun (the ecliptic). Because of this, at the time of a new moon, the Moon will usually pass to the north or south of the Sun.
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. Analogously, Earth's ...
A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. An annular solar eclipse occurs when the Moon's apparent diameter is smaller than the Sun's, blocking most of the Sun's light and causing the Sun to look like an annulus (ring). An annular ...