Total Solar Eclipse- an eclipse in which the whole of the disk of the sun or moon is obscured.
Partial Eclipse -an eclipse of a celestial body in which only part of the luminary is obscured or darkened.
Lunar Eclipse - an eclipse in which the moon appears darkened as it passes into the earth's shadow.
Totality - the moment or duration of total obscuration of the sun or moon during an eclipse.
Umbra - the fully shaded inner region of a shadow cast by an opaque object.
Penumbra- the partially shaded outer region of the shadow cast by an object not letting light through. The shadow cast by the earth or moon over an area experiencing a partial eclipse.
Baily’s Beads- the row of brilliant points of sunlight shining through valleys on the edge of the moon that are seen for a few seconds just before and after the central phase in an eclipse of the sun.
Diamond Ring - An optical phenomenon visible during a moment of a solar eclipse when only a tiny part of the sun is not obscured by the moon, shining like a diamond in the ring of the sun's corona.
Shadow Bands- one of a series of darkish narrow parallel bands seen to rush swiftly across the landscape just before or after totality in a solar eclipse probably due to optical effects of the earth's atmosphere.
Ring of Fire- The event is called a ring of fire eclipse because the moon's distance from the sun means it won't completely block out the sun's rays. Instead, we'll see a fiery halo in the sky.