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.
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 isn’t bright. But it moves exceptionally rapidly against the background of more distant stars. Its motion reveals its nearness to Earth.
Albireo is known best for the striking color contrast between its two stars, with the brighter star gold and the dimmer star blue.
How to spot it, plus an explanation of why meteors in annual showers have radiant points.
One of the prettiest stories in all skylore surrounds this star. “On the 7th night of the 7th moon … “
On summer nights, two famous stars shine down from high in the northern sky. Eltanin and Rastaban represent the fiery Eyes of the constellation Draco the Dragon.
At the end of the Scorpius the Scorpion’s graceful pattern of stars, you’ll find the Stinger stars. Shaula and Lesath are noticeably bright and close together.
The ruby Heart of Scorpius is the 16th brightest star in our sky and one of the most gigantic stars known.
Alphecca. Gemma. Alpha Coronae Borealis or simply Alpha Cor Bor. They’re all names for one star – the brightest star in the constellation Northern Crown.
Although some scientists claim stars can’t look green, many stargazers will swear that Zubeneschamali proves otherwise.
Two noticeable stars in the Little Dipper are said to guard the north celestial pole because they circle so close to Polaris.
Zubenelgenubi is an Arabic name that means this star was once seen as the Southern Claw of Scorpius the Scorpion.
The entire northern sky wheels around Polaris. Some assume it’s the brightest star in the sky. In fact, Polaris ranks only 50th in brightness.
The third star in the system, a red dwarf called Proxima Centauri, is thought to be about 4.22 light-years distant and is actually our sun’s closest neighbor.
Arcturus is cutting perpendicularly through the galactic disk at a tremendous rate of speed – some 150 kilometers per second.
Thuban was the Pole Star some 5,000 years ago, when the Egyptians were building the pyramids.
Spica is a binary star, with two stars larger and hotter than the sun, telescopically indistinguishable from a single point of light.
Mizar and its fainter companion star Alcor are located in the handle of the Big Dipper. They are one of the sky’s easiest-to-spot double stars.
The star Cor Caroli, or Alpha Canum Venaticorum, is a binary star and the brightest star in the northern constellation Canes Venatici.
If you’re in the U.S., you must be at about New Orleans’ latitude to glimpse it. From the southern hemisphere, Mimosa is a prominent and beloved star.