Noun
only a thin outer disk of the sun can be seen
Source: WordNetA total eclipse occurs when the observer is within the umbra, an annular eclipse when the observer is within the antumbra, and a partial eclipse when the observer is within the penumbra. Source: Internet
In an annular eclipse, the Moon passes directly in front of the Sun, but because of the Moon’s elliptical orbit, it’s a little too distant and small-seeming to obscure the entire Sun. Source: Internet
When the umbra does not reach the surface of the Earth, the Sun is only partially occulted, resulting in an annular eclipse. Source: Internet
Please be advised: It is never safe to look at a partial or annular eclipse, or the partial phases of a total solar eclipse, without the proper equipment and techniques. Source: Internet