A total solar eclipse occurs when the moon completely blocks the sun from part of the Earth, essentially turning day into night.
A total lunar eclipse occurs when Earth blocks all sunlight from reaching the moon save for the small amount that is refracted through the atmosphere.
Yes, these are called partial eclipses.
yes they do
There was 2 lunar eclipses in 2008.
Yes
The corona during total solar eclipses.
About two per year, since the Moon formed. So, around 4000 solar eclipses (and 4000 lunar eclipses) since the year 1. You can check the list of all eclipses since the year 2000 BC on the NASA Eclipse Web Page at the link below.
no
The total number of eclipses each year does not exceed seven: typically, there are a maximum of five solar eclipses and two lunar eclipses in a given year. This number can vary slightly due to particular celestial alignments.
There are two main types of eclipses: solar and lunar. Lunar eclipses occur every 6 months. Solar eclipses occur 2-5 times per year. Eclipses can be partial or total. Partial eclipse covers only part of the sun or moon, while total covers the full entity.
On average, there are about 2-4 lunar eclipses each year. These can vary in type, with some being total eclipses and others being partial or penumbral eclipses.
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.
About twice a year.