Arcturus, the brightest star in the constellation Botes and one of the brightest stars in the night sky. Arcturus is a giant orange-colored star with a diameter about 25 times that of the sun. The surface temperature of Arcturus is only 7,000 F. (3,870 C.), some 3,000 F. (1,670 C.) less than the sun's surface temperature. Because of its size, however, Arcturus gives off more than 100 times as much light and heat as the sun. Arcturus is approximately 36 light-years from the earth. It has an apparent magnitude of -0.1 and an absolute magnitude of -0.3.
You Might Also Like
Wolves supposedly howl at it, a fairy tale claims a cow once jumped over it and legends say if you look hard enough, there's a man in it. Yes, the moon has a prominent place in popular culture, but there's a lot you might not know about Earth's little orbiting friend. Why doesn't it have soil? Why is its gravity so important? And are we really thinking of going back soon?
Where I live it is pretty common to see "shooting stars" -- streaks of light in the sky at night. How big is a shooting star? Do they land on earth or do they burn up? Do they land on the ground as meteorites?