Brightest Stars

Betelgeuse
Feb 04, 2012 Tonight

Star of the Week: 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
Jan 29, 2012 Tonight Leave a comment

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.

Double star system Capella.  Image Credit: Atlas of the Universe
Jan 21, 2012 Tonight 32 Comments

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
Jan 15, 2012 Tonight 64 Comments

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
Jan 07, 2012 Tonight 6 Comments

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.

Via Wikimedia and Caravaggio
Oct 31, 2011 Tonight Leave a comment

Algol is the Demon Star

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

Arcturus_sun
May 18, 2011 Tonight 20 Comments

Arcturus, orange star, cuts through galaxy’s disk

Arcturus is cutting perpendicularly through the galactic disk at a tremendous rate of speed – some 150 kilometers per second.

Artist's concept of Spica from hypothetical planet
Apr 28, 2011 Tonight 9 Comments

Spica is a whirling double star

Spica is a binary star, with two stars larger and hotter than the sun, telescopically indistinguishable from a single point of light.

alphard
Mar 16, 2011 Tonight Leave a comment

Alphard is the Snake’s Heart

You can see Alphard – the Heart of the constellation Hydra the Water Snake – in the evening in March, April, and May.

Procyon is easy to find on winter evenings.
Mar 03, 2011 Tonight 7 Comments

Procyon is the Little Dog Star

Procyon – in Canis Minor the Lesser Dog – actually means “before the dog.” That’s because it rises into the sky shortly before the Dog Star Sirius in Canis Major.