Mizar, a star in the Big Dipper's handle, has a tiny companion. This star, Alcor, was known to the ancients. The pair was popularly known as the "Horse and Rider." At around 10 p.m. local daylight ...

The Big Dipper is not a constellation itself, but an asterism within the constellation Ursa Major. It's visible throughout the year in the Northern Hemisphere, but it's most prominent during the ...

Mizar, a star in the Big Dipper's handle, has a tiny companion. This star, Alcor, was known to the ancients. The pair was popularly known as the "Horse and Rider." ...