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A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially.Such an alignment occurs approximately every six months, during the eclipse season in its new moon phase, when the Moon's orbital plane is closest to the plane of Earth's orbit. [1]
In a partial solar eclipse, the magnitude of the eclipse is the fraction of the Sun's diameter occulted by the Moon at the time of maximum eclipse. As seen from one location, the momentary eclipse magnitude varies, being exactly 0.0 at the start of the eclipse, rising to some maximum value, and then decreasing to 0.0 at the end of the eclipse.
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.
A hybrid solar eclipse switches between annular and total. A partial solar eclipse happens when the moon only covers a portion of the sun. At least two solar eclipses happen each year, per NASA.
Sept. 21, 2025 — Partial solar eclipse. Later that same year, Australia, Antarctica, the Pacific Ocean and the Atlantic Ocean will be treated to a partial eclipse. 2026.
In all other parts of the continental U.S., a partial solar eclipse will be visible, with the moon appearing to take a bite out of the sun. Exactly how big a bite depends on the location.
A partial solar eclipse will occur at the Moon’s ascending node of orbit on Saturday, March 29, 2025, [1] with a magnitude of 0.9376. 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.
The next total solar eclipse that can be seen from the contiguous U.S. will be on Aug. 23, 2044.—Hawaii will not experience another total solar eclipse until some time after 2200.—View the ...