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Brightest Stars

Betelgeuse
Tonight | Jan 26, 2014

Betelgeuse will explode someday

Someday, the star Betelgeuse will run out of fuel, collapse under its own weight, and then rebound in a spectacular supernova explosion. Someday … but probably not soon.

Elnath represents the Bull's Northern Horn.  Via Urania
Tonight | Jan 22, 2014

Elnath is close to the galactic anticenter

Elnath is the second-brightest star in Taurus the Bull. It’s the closest bright star to the galactic anticenter – the point in space that lies directly opposite of the center of our Milky Way galaxy.

Capella system, via Atlas of the Universe
Tonight | Jan 12, 2014

Capella is two golden stars

We see Capella as the brightest star in the constellation Auriga the Charioteer. It is really two stars, each with a golden color similar to our sun.

Blue-white Rigel via Clark Planetarium
Tonight | Videos | Jan 05, 2014

Rigel in Orion is blue-white

We could not live as close to Rigel as we live to our sun, because Rigel is nearly twice as hot – and about 40,000 times brighter – than our local star.

Aldebaran-Sun_comparison_cropped
Tonight | Dec 29, 2013

Aldebaran is the Bull’s fiery eye

If Aldebaran were placed where the sun is now, its surface would extend almost to the orbit of Mercury.

Mirfak and Algol in Perseus
Tonight | Dec 26, 2013

Mirfak is Perseus’ brightest star

Mirfak isn’t as famous as its brother star in Perseus, called Algol. But Mirfak is easier to find and can help guide you to Algol.

Look south in late autumn / early winter
Tonight | Dec 11, 2013

Menkar is the Whale’s alpha star

Okay, it’s not the most famous star in Cetus. It’s not even the brightest, although it carries the designation Alpha. But Menkar has its own claims to fame.

Star trails, one of which is Hamal, via H. Raab on Flickr.
Tonight | Dec 03, 2013

Hamal is an ancient equinox star

The star Hamal, also known as Alpha Arietis, is the brightest star in Aries the Ram. Learn the role this star played in defining the term First Point in Aries.

Four stars in the Almach system
Tonight | Nov 17, 2013

Almach is a quadruple star system

Almach looks like a single star to the eye and like a colorful double star through a telescope. But today we know Almach as four stars.

Achernar is flattened because it rotates rapidly
Tonight | Nov 10, 2013

Achernar is the End of the River

Achernar – also known as Alpha Eridani – is the 9th brightest star in Earth’s sky and the flattest star known.