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This image shows the debris ring around Fomalhaut and the location of its first known planet. This is the actual discovery image, published in the journal Science in November, 2008. Fomalhaut b was the first beyond our solar system visible to the eye in photographic images. Image via Hubble Space Telescope.

Fomalhaut had first visible exoplanet

Fomalhaut is sometimes called the Loneliest Star. Its planet, Fomalhaut b, was the first planet beyond our solar system to be visible to the human eye.

Like lights in a dark tunnel, stars in the distant universe become fainter as they are farther away.  But, because they pulsate at a particular rate always correlated to their intrinsic brightnesses, Cepheid variable stars reveal their own true distances.  Image via The Last Word on Nothing

Delta Cephei is a famous variable star

Delta Cephei doubles in brightness every 5.36 days. This star and others like it have helped establish the known scale of our galaxy and universe.

Alpha Cephei, or Alderamin, via M. Zao.

Alpha Cephei is a rapidly rotating star

Cepheus the King is not a very conspicuous constellation and has only one relatively bright star, Alderamin – aka Alpha Cephei. This star rotates rapidly!

61 Cygni is a double star, captured here by Scott MacNeill at Frosty Drew Observatory, Charlestown, Rhode Island, June 2015.

61 Cygni is the Flying Star

61 Cygni isn’t bright. But it moves exceptionally rapidly against the background of more distant stars. Its motion reveals its nearness to Earth.

Deneb-cropped

Deneb is distant and very luminous

Deneb is one of the most distant stars you will see with your eye alone. That’s because it’s one of the most luminous stars in the Milky Way galaxy.

Image via Ming Zhao / University of Michigan

Altair is the bright star of the Eagle

Altair needs only 10 hours to spin once on its axis, in contrast to roughly a month for our sun. This mighty star spins on its axis more rapidly than Earth! How to see it.

Image via Tom Wildoner

Albireo, beloved double star

Albireo is known best for the striking color contrast between its two stars, with the brighter star gold and the dimmer star blue.

Image via Janusz Krysiak/Astronomy Sketch of the Day

Epsilon Lyrae, famous Double Double star

Binoculars reveal Epsilon Lyrae as a double star – two stars in one. A telescope shows that each component star is also a double. The double double star!

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Vega is the Harp Star

One of the prettiest stories in all skylore surrounds this star. “On the 7th night of the 7th moon … “

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Eltanin and Rastaban, the Dragon’s Eyes

These two famous stars shine down from the northern sky. Eltanin and Rastaban represent the fiery Eyes of the constellation Draco the Dragon.