The Sun is never completely blocked by the Moon during an annular solar eclipse. Therefore, during an annular eclipse, it is never safe to look directly at the Sun without specialized eye protection designed for solar viewing. You can also use an indirect viewing method, such as a pinhole projector.

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people wearing Eclipse glasses NASA employees use protective glasses to view a partial solar eclipse from the rooftop at NASA Headquarters on Monday, Aug. 21, 2017, in Washington, DC. Credits: NASA/Connie Moore