Ursa Major or the great bear is a large constellation in the northern hemisphere which contains many amazing wonders, from galaxies to meteor showers. as well as this Ursa Major plays a key role in locating North, by leading the way to the north star Polaris, in the nearby constellation of ursa minor. Ursa Major never sets in the northern hemisphere so is visible all year round.
Ursa major is well known for containing the asterism, the big dipper. It is often used to locate the Northern star, Polaris. It is found by imagining a line between the stars Merak and Dubhe and then extending this line five times the distance of these two pointer stars, until a bright star is reached. This is the north star Polaris.
Ursa major is also home to a famous binary star system containing two stars called Mizar and Alcor. These two stars form an optical binary stat system which means that they aren’t gravitationally related, but appear to be close to each other in the sky. Mizar and Alcor are sometimes known as the horse and rider. also it is said that being able to see Alcor with the naked eye is a sign of good eyesight, although in reality even people with poor eyesight can see the pair.
Ursa major is also a great constellation for those interested in the deep sky objects. It contains several spectacular galaxies including the Pinwheel galaxy or M101.