For an eclipse, Sun, Earth and Moon must be aligned. Most of the time, the Moon doesn't pass exactly in front of the Earth (for a solar eclipse) or behind it (for a lunar eclipse), but passes more to the north or more to the south. This is because the Moon's orbit around the Earth is not exactly in the same plane as Earth's orbit around the Sun.
A full moon lunar eclipse happens approximately twice a year.
They only happen once in or twice in a lifetime!
Your birthday occurs more often than a lunar eclipse. Lunar eclipses happen roughly twice a year, whereas your birthday occurs once a year.
There are generally two solar eclipses and two lunar eclipses each year. Of the lunar eclipses, about 40% are "total"; the remainder are partial or penumbral. A lunar eclipse is visible from one-half of the Earth's surface. So on average, and weather permitting, you will see a total lunar eclipse about every third year.
Solar eclipses happen twice a year or so. The problem is that the geometry is a little touchy; if it isn't just so, you won't get a total eclipse, but only a partial eclipse. And the area of the Earth affected by the solar eclipse is very small; a path about 100 miles wide and a few thousand miles long. Since 75% of the Earth's surface is water, a lot of eclipses aren't visible on land at all. NASA's Eclipse web page will let you see when each eclipse will occur, and where.
Lunar eclipses happen about twice a year at the full moon. Solar eclipses happen about twice a year at the new moon.The link below to the NASA Eclipse Site lists details about every eclipse from 2000 BC to 3000 AD.
Lunar Eclipses happen on average twice a year.
During the 100 years of the 20th Century, there were 228 solar eclipses and 229 lunar ones. So over the long term, you can figure on equal numbers, at the rate of around 7 of each every 3 years.
A full moon lunar eclipse happens approximately twice a year.
They only happen once in or twice in a lifetime!
Lunar eclipses can happen a maximum of twice per year, and only at the time of the full moon. Sometimes the alignment is just right, and we get a total lunar eclipse. If the alignment isn't exact, we might get a partial or a penumbral eclipse instead of a total eclipse.
Globally, solar eclipses are slightly more frequent. But a lunar eclipse can be seen from any place where the Moon is above the horizon, whereas a solar eclipse can only be seen from a narrow strip of land. So, for any particular fixed observer, solar eclipses - and especially total solar eclipses - are quite rare. During the 100 years of the 20th Century, there were 228 solar eclipses and 229 lunar ones. So over the long term, you can figure on equal numbers, at the rate of around 7 of each every 3 years.
Your birthday occurs more often than a lunar eclipse. Lunar eclipses happen roughly twice a year, whereas your birthday occurs once a year.
Actually it doesn't. Typically, a lunar eclipse happens about twice a year.
A solar eclipse occurs when the moon passes between Earth and the sun, blocking the sun's light and casting a shadow on Earth's surface. Solar eclipses happen periodically, with the frequency depending on the type of eclipse (partial, annular, total) and the location on Earth from which it is visible.
There are generally two solar eclipses and two lunar eclipses each year. Of the lunar eclipses, about 40% are "total"; the remainder are partial or penumbral. A lunar eclipse is visible from one-half of the Earth's surface. So on average, and weather permitting, you will see a total lunar eclipse about every third year.
Solar eclipses and lunar eclipses each happen about twice a year. However, a lunar eclipse can be seen from the entire night-side of the Earth, while a solar eclipse is visible across only a narrow path across the planet. And since 3/4 of the Earth is covered by water, many eclipses are never seen by anybody! For example, the next solar eclipse is on July 11, 2010. The path of totality begins deep in the South Pacific Ocean, and covers a few scattered atolls in French Polynesia, Easter Island, and the southern tips of Chile and Argentina.