Antares, the brightest star in the constellation Scorpius. The star has a red color like that of the planet Mars. This color is due to the star's relatively low surface temperature (about 5,500 F. [3,040 C], as compared to 11,000 F. [6,100 C] for the sun's surface). Antares was named for its color; it means "rival of Mars" (Ares is the Greek name for Mars). Antares is about 520 light-years from the earth. Its brightness is due to its large sizeit is about 350,000,000 miles (560,000,000 km) in diameter. It is one of the largest stars known and belongs to a class of stars called supergiants. It is a variable star, with a magnitude of 0.92 at maximum brightness. Antares has a much hotter, smaller, faint blue companion star.
You Might Also Like
What if your job were to protect life in the galaxy at all costs? That's exactly what the folks manning NASA's Planetary Protection office do, and bunny suits are just the beginning.
A look at the night sky at any time of year will reveal a faint band of light stretching across the sky -- our solar system's home, the Milky Way. How much do we really know about it?