The longest that a solar eclipse will last is seven and a half minutes. The most solar eclipses of any type that can occur on Earth within a year is five.

solar eclipse An event in which the moon passes between the Earth and sun and obscures the sun, at least partially. The Moon Eclipses the Sun. Solar Eclipse Start Time – 10:20 AM Maximum Eclipse Time – 12:02 PM Eclipse End Time – 01:49 PM. NASA. The next time a total solar eclipse will traverse from coast to coast will be in 2045. The June 21 solar eclipse will be visible in India as well as much of Asia, Africa, the Pacific, and the Indian Ocean. Anyone within the path of totality can see one of nature’s most awe inspiring sights - a total solar eclipse. NASA Solar Eclipse Publications Online. On August 21, 2017, the Earth will cross the shadow of the moon, creating a total solar eclipse. An annular solar eclipse happens when the moon covers most but not all of the sun. Sometimes the moon only blocks part of the sun’s light.

47 th meeting of the American Astronomical Society Solar Physics Division, Boulder, Colo., June 3, 2016. This is called a partial solar eclipse. Texans and San Antonians anxious for the August 21 solar eclipse, may have a once in a lifetime opportunity for the next one on the list. Eclipses happen about every six months, but this one is special.
The Moon's shadow is not big enough to engulf the entire planet, so the shadow is always limited to a certain area (see map illustrations below). A total solar eclipse begins as a barely perceptible nibble out of the sun. In a small way, the eclipse is this young generation's Apollo moment and more than a few students will be inspired to seek an education in the sciences. ISO-approved solar-eclipse glasses must meet certain safety requirements: No more than 0.00032 percent of the sun's light may be transmitted through the filters. Solar and lunar eclipses, why they occur, when the next eclipse is, and from where you can see them.

The last time a total solar eclipse occurred in the Lower 48 was 1979. On August 21, 2017, the shadow of the Moon will sweep across the U.S. landscape, transforming day to twilight. NASA eclipse website—total solar eclipse of 2017 Aug 21. The total eclipse will last for 3.12 minutes.
In the surreal gloaming of an eclipse, the temperature drops, birds go silent, crickets begin to chirp, and blossoms start to close. A solar eclipse happens when, at just the right moment, the moon passes between the sun and Earth.

F or the first time in U.S. history, a solar eclipse will travel exclusively across America, enabling millions of people to view the moon block out the sun on Aug. 21.