The sun, moon and earth are going to be in syzygy on Tuesday starting at about 12:30 p.m. our time. Syzygy is a nearly straight line of three celestial bodies.
The path of totality, where the entire face of the sun will be covered by the moon, is shown in the following diagram.
Photo source: Jay Anderson
To learn about solar eclipses, visit this Weather 101.
You'll be able to watch the eclipse live beginning 12:15 p.m. our time on Tuesday right here on TucsonNewsNow.com.
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First Alert weather for Southern Arizona featuring Kevin Jeanes, Aaron Pickering, Erin Jordan and Dan Bronis.