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Brightest Stars

Blue-white Rigel via Clark Planetarium
Tonight | Jan 06, 2015

Rigel in Orion is blue-white

We couldn’t 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, 2014

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 22, 2014

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 08, 2014

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 02, 2014

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.

Mira, from NASA's Galaxy Evolution Explorer
Tonight | Nov 27, 2014

Mira the Wonderful

This star in the constellation Cetus varies in brightness like clockwork over 11 months. That’s why, for centuries, stargazers have called it Mira the Wonderful.

Four stars in the Almach system
Tonight | Nov 18, 2014

Star of the week: 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 11, 2014

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.

Al Risha via STScI
Nov 05, 2014

Al Risha knots two Fishes of Pisces together

The star Al Risha in Pisces is not bright. But – at the tip of the graceful V in Pisces – it’s very noticeable.

Medusa_by_Caravaggio-cp
Tonight | Oct 31, 2014

Algol is the Demon Star

On (or around) Halloween, look for Algol – a star named for a demon!