"Occulting binary". The word "occult" means hidden or in shadows; if a binary star's orbital plane happens to be exactly through the Earth's path, we might see two stars when they're separate and then see one of the stars disappear behind (or in front of) the other.
an eclipsing binary
eclipsing binary
That's an eclipsing binary star.
The dark area formed by an object that blocks out light is called a shadow.
shadow
A Solar Eclipse
Eclipse of the moon.
When the moon blocks the sun's light, or the Earth blocks the light from the sun that strikes the moon, it's called an eclipse. For an arbitrary body passing in front of another one, the term astronomers usually use is "occultation".
That's an 'eclipsing binary'.
The dark area formed by an object that blocks out light is called a shadow.
Translucent. A material which transmits 100% (or close to 100%) of the light striking it is called transparent. A material which blocks 100% of the incident light is called opaque.
A Solar Eclipse
Eclipse of the moon.
shadow
That happens in an "eclipsing binary".
Its an opaque object.
When the moon blocks the sun's light, or the Earth blocks the light from the sun that strikes the moon, it's called an eclipse. For an arbitrary body passing in front of another one, the term astronomers usually use is "occultation".
block* When the moon blocks the sun's light, it is called a solar eclipse.
The hand blocks the light
its call a lunar eclipse.