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The corona is made of hot, glowing plasma flying off of the Sun. It can only be seen when the Sun is completely eclipsed. Credit: Blake Estes

Observing, The Moon, The Sun, Upcoming events

Solar eclipse: Plan for the next big one in North America

Totality comes to America

Exotic Objects, Science, Stars

Crab Nebula exploded in 1054

A ghostly nebula glows in Cassiopeia

A portion of the Nessie Nebula

Nessie Nebula shows how shocks can birth new stars

Crescent Nebula

Upcoming events

Take in the Orion Nebula: This Week in Astronomy with Dave Eicher

A new view of the Orion Nebula

Ant Nebula

Deep-Sky Objects

101 Must-See Cosmic Objects: The Orion Nebula

Deep-Sky Objects

Globular cluster M28, open cluster M25, and planetary nebula NGC 6781

The Boomerang Nebula