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The earth's orbit of the sun and the moon's orbit of the earth are not on the same plane; one of the two orbits is tilted about five degrees with respect to the other, so the moon usually misses the earth's shadow.

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Q: Why don't lunar eclipses occur during every lunar cycle?
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Do lunar eclipeses occur only every three years?

No. During the 5000-year period 2000 BCE to 3000 CE, there have been / will be a total of 12,064 lunar eclipses ... an average of about 2.4 per year. During the 10-year period 2001 to 2010, there are 24 lunar eclipses ... also 2.4 per year. There were 3 lunar eclipses in 2001, and 4 lunar eclipses in 2009. December 21, 2010 is/was the second lunar eclipse of 2010. So over the long term, you're looking at between 2 and 3 lunar eclipses every year.


Does a lunar eclipse occur every 3 year?

During the 100-year period from 1901 to 2000, there were 228 solar eclipses and 229 lunar eclipses. On the average, that's 2.28 or 2.29 of each kind, for every year, but in in individual year, it can be as many as 4


Is there about 2 lunar eclipses a year?

From 2008 to 2015, lunar eclipses average about 1 every 5 months.


When lunar and solar eclipses occur?

Every year


Do lunar eclipses occur every 3 hours?

No. During the 20th Century, they averaged about 2.3 per year.


What are the kinds of eclipses?

On earth there are 2 eclipses, Lunar and Solar eclipses


Can a lunar eclipse occur during the quarter moon phase?

No, it cannot. Lunar eclipses (they really aren't even true eclipses) can happen only during full moon.


How often are total lunar eclipse cycles?

In general, there are two lunar eclipses and two solar eclipses each year. On average, about half are total and half are partial, so you can expect, over a span of years, to see one total lunar eclipse every other year. There are sometimes cycles of eclipses. In 2014-2015, there will be four sequential total lunar eclipses, with no partial eclipses in between; this cycle is called a "tetrad" and it isn't all that unusual. There will be eight such tetrads in the 21st century; this will be the second tetrad of the century.


Do lunar eclipses occur every 3 years?

Typically, lunar eclipses occur once or twice a year. Because more than half of all lunar eclipses are partial, and because lunar eclipses are visible only from the side of the Earth where the Moon is up, you would generally be able to see a total lunar eclipse every other year or every 3rd year from your location. The rest of the eclipses would be either partial, or not visible from your location. You can check the NASA Eclipse Web Page to see the catalog of all eclipses from 2000 BCE to 3000 AD at the link below.


How many times during a year could there be a solar or lunar eclipse?

During the 100 years of the 20th Century (1901 - 2000), there were 228 solar eclipses and 13 times lunar eclipses.


What is Aristotle's hypothesis of lunar eclipses?

Lunar eclipses were created by our shadow.


Lunar eclipses occur every 3 years?

Typically, lunar eclipses occur once or twice a year. Because more than half of all lunar eclipses are partial, and because lunar eclipses are visible only from the side of the Earth where the Moon is up, you would generally be able to see a total lunar eclipse every other year or every 3rd year from your location. The rest of the eclipses would be either partial, or not visible from your location. You can check the NASA Eclipse Web Page to see the catalog of all eclipses from 2000 BCE to 3000 AD at the link below.