A total lunar eclipse that astronomers predict will be a "celestial theater" is happening on Sunday evening over Arizona.
Two factors make this eclipse worth seeing: The skies are generally clear over Arizona in May. And this eclipse happens Sunday evening, making it easy to fit into your weekend schedule.
"You couldn’t put together a better set of circumstances for us here in the Southwest," said Adam Block of the University of Arizona Steward Observatory.
Lunar eclipses happen when the sun, Earth and moon align so the moon passes into Earth's shadow. The moon gradually turns a dark orange or red, which is sometimes referred to as a "blood moon." The more dust or clouds in the Earth's atmosphere, the redder the moon appears.
Here's how to catch the May 15 eclipse. All times below are Arizona times:
Kevin Schindler, historian at Lowell Observatory in Flagstaff, said the best views happen from roughly 7 p.m. to 9 p.m.
“For us in Arizona, you couldn’t make it a much better time.”
Best of all, you don't need special equipment to see the lunar eclipse. Just your eyes or a pair of binoculars.
For those who want to learn more, Lowell Observatory will host a free online Total Lunar Eclipse Virtual Party from 7:15 to 8:15 p.m. on Sunday. Lowell will stream the eclipse live using a state-of-the-art telescope while staff members give presentations. Information is available here.
More lunar events:How to see the January Wolf Moon and this year's supermoons, eclipses and meteor showers
Lunar eclipses can also make for great photographs. If you want to photograph the eclipse, here are some tips:
In the Phoenix area, the Astronomy Association of Arizona at Verrado, will hold a public outreach event that is free beginning at 7 p.m. Sunday at Redmond Ball Field, 20895 W. Hamilton St., Buckeye.
The group will live stream the Lowell Observatory program, and seven telescopes will be set up onsite for viewing.
Reach the reporter at anne.ryman@arizonarepublic.com or 602-444-8072. Follow her on Twitter @anneryman.
Support local journalism. Subscribe to azcentral.com today.