Cygnus, the Swan
The brightest stars of Cygnus form a cross, so the swan is also known as the Northern Cross. Find it soaring high overhead during late summer evenings.
The constellation's brightest star is Deneb — an Arabic word that means "the tail." Deneb — the tail of the swan — marks the top of the cross. The swan's outstretched wings form the horizontal bar of the cross, while the head of the swan — a double star called Albireo — is the bottom of the cross.
Although it lies about 1,500 light-years from Earth, Deneb shines brightly in our night sky because it's a white supergiant — a star that's much larger, hotter, and brighter than the Sun. Deneb is the northeastern point of a star pattern called the Summer Triangle.
If you use binoculars to scan the area between the two bright stars that define the swan's eastern wing, you'll see the remnant of a supernova — a faint, incomplete ring of light called the Cygnus Loop.
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