The most famous kind of eclipse is a solar eclipse, when the light of the Sun is blocked by the Moon.
A Solar Eclipse
A lunar eclipse is when the light of the Sun is blocked from shining on the Moon by the Earth.
These excellent photos & diagrams come from http://www.mreclipse.com/MrEclipse.html
Tonight from 7:00 pm to about 8:30 pm, you should be able to watch a lunar eclipse – if it isn’t too cloudy! Just look for the full moon and then watch it turn red.
In conversation English, “to eclipse” can also mean to make another thing or person less famous or successful by being more famous or successful. For example, in the 1980s, handsome young actor Eric Roberts seemed certain to become a big star.
However, he was soon eclipsed by his little sister…
If you want to check out Eric Roberts at his best, I recommend these movies: