"Ring of Fire" Solar Eclipse Coming Sunday

Annular eclipse to be visible from Asia, U.S. West.

An annular solar eclipse creates a "ring of fire" in the skies over China in 2010.

This weekend, a "time traveling" solar eclipse will turn the familiar disk of the sun into a ring of fire for sky-watchers in parts of Asia and the U.S. West.

Known as an annular eclipse, the event is the first of its kind to be visible from the mainland United States since 1994. The region won't see another such eclipse until 2023.

Watch a live feed of the May 20-21 annular eclipse.