The region of sky surrounding Antares, known as Rho Ophiuchus.
Click on image for full size
© Loke Kun Tan (StarryScapes)
Antares - Red Supergiant Star
What's in a Name:|| Greek for "Rival of Mars" (Ares is Greek for Mars). Sometimes Antares is mistaken for Mars when they are close together because both are red.
| Claim to Fame:|| Brightest star in the constellation Scorpio, the Scorpion. 16th brightest star in the sky (apparent visual magnitude = 0.9)
|Type of Star:|| Red Supergiant (M1 Ib Spectral Class)
|How Far Away:|| 325 light years away
|How Big:|| 300 times as big as the sun (More than twice the diameter of the Earth's orbit).
|How Bright:|| 3000 times the sun's luminosity (Mv = -4.5)
|Where to View:|| In the constellation Scorpio, the Scorpion (Star Map).
|When to View:|| July through August from Northern middle latitudes
Shop Windows to the Universe Science Store!
The Summer 2010 issue of The Earth Scientist
, available in our online store
, includes articles on rivers and snow, classroom planetariums, satellites and oceanography, hands-on astronomy, and global warming.
You might also be interested in:
Satellites in the 1960's looked for a type of light called Gamma Rays. They found bursts of Gamma Rays coming from outer space! They can't hurt you. They are stopped by the Earth's atmosphere. We have...more
When we look up at the night sky, we notice that there are many stars in our sky. Stars must like to live together in star cities - galaxies. Our city of stars is called the Milky Way, and it is home to...more
Neutron Stars form when really big stars die. When such a star runs out of fuel its center begins to collapse under gravity. When the center collapses the entire star collapses. The surface of the star...more
Spiral galaxies may remind you of a pinwheel that blows in the breeze. Like a pinwheel, a spiral galaxy is rotating, and it has spiral arms. Through a telescope or binoculars,a spiral galaxy may look...more
When stars like our own sun die they will become White Dwarfs. As a star like our sun is running out of fuel in its center it grows into a red giant. This will happen to our sun in 5 Billion years. The...more
What's in a Name: Arabic for "head of the demon" Claim to Fame: Represents Medusa's eye in Perseus. A special variable star that "winks" every 3 days. Type of Star: Blue-white Main Sequence Star, and...more
What's in a Name: Nicknamed the "Pup" because it is the companion to Sirius, "the Dog Star" Claim to Fame: Highly compressed white dwarf remnant. Density about 50,000 times that of water. It has approximately...more