Big Dipper

The Big Dipper (Canada, US) or the Plough (UK, Ireland) is a famous group of stars known as an asterism. It is part of the larger constellation called Ursa Major, which looks like a bear. The Big Dipper is made up of seven bright stars: six are very easy to see, and one is a little dimmer. These stars form a shape that looks like a bowl with a handle, or sometimes like a plough.

People all around the world have recognized this star pattern for thousands of years. It is especially helpful for finding directions in the night sky. By drawing an imaginary line through two of the stars in the front of the Big Dipper, called Merak and Dubhe, you can locate the North Star, also known as Polaris. Polaris is the current northern pole star and helps point toward the tip of the handle of the Little Dipper, or Little Bear.

Because the Big Dipper is easy to spot and appears in many places, it has become a special and well-known part of stargazing and celestial navigation. It helps people find their way at night and has been important in many cultures and stories.

Names and places

The constellation of Ursa Major has been seen as a bear, a plough, a wagon, or a ladle in different cultures. The tradition of seeing it as a bear is Indo-European, appearing in Greek and Vedic India, and also has parallels in Siberian or North American traditions.

In Ireland and the United Kingdom, this pattern is known as the Plough. The symbol of the Starry Plough has been used as a political symbol by Irish Republican and Irish left wing movements. Former names include the Great Wain, Arthur's Wain or Butcher's Cleaver. The terms Charles's Wain and Charles his Wain are derived from the older Carlswæn. In German, it is known as the "Great Wagon" and, less often, the "Great Bear". In Dutch, its official name is the "Great Bear", but it is popularly known as the "Saucepan". In Italian, it is called either the "Great Wagon" or "Orsa Maggiore" ("Greater Bear").

In Chinese astronomy and Chinese constellation records, The Big Dipper is called "Beidou" (Northern Dipper). The Chinese name for Alpha Ursae Majoris is Beidou Yi (Beidou One) and Tianshu (Star of Celestial Pivot). The asterism name was mentioned in Warring States period stellar records, in which the asterism is described to have seven stars in the shape of a dipper or a chariot.

In Vietnam, the colloquial name for the asterism is Sao Bánh lái lớn (The Big Rudder Stars), contrasted with Ursa Minor, which is known as Sao Bánh lái nhỏ (The Little Rudder Stars). In Malay, it is known as the "Boat Constellation"; in Indonesian, as the "Canoe Stars". In Burmese, these stars are known as Pucwan Tārā. In Thai, they are known as the "Crocodile Stars".

In Inuit astronomy, the same grouping of stars is referred to as "the Caribou". Many of the stars within the constellation were used as hour hands on the night sky to indicate hours of the night, or as calendar stars to help determine the date in fall, winter, or spring.

The asterism name "Big Dipper" is mostly used in the United States and Canada. However, the origin of the term is disputed. A popular myth claimed the name originated from African-American folk songs; however, a more recent source challenges the authenticity of the claim.

Stars

The Big Dipper is made up of seven bright stars found in the constellation Ursa Major. These stars have special names and are arranged in a shape that looks like a spoon or a plow. Some of these stars, called the Ursa Major Moving Group, move together through space, while others move in different directions. Over many thousands of years, this will change the shape of the Big Dipper.

Near one of the stars, Mizar, there is another star called Alcor. Together, they are known as the "Horse and Rider." Seeing both stars with the naked eye is a traditional test of good eyesight. Mizar itself is made up of four stars and was one of the first pairs of stars discovered using a telescope.

Guidepost

The Big Dipper can help you find other stars and objects in the night sky. By drawing an imaginary line from the star Merak to Dubhe, you can locate Polaris, the North Star. Other stars like Regulus and Arcturus can also be found by extending lines from stars in the Big Dipper.

You can even find interesting objects for telescopes, like the Hubble Deep Field and the galaxies M81 and M82, by using the Big Dipper as a guide.

Cultural associations

The Big Dipper has been important in many cultures and stories. In the Bible, the "Seven Stars" might refer to these stars. The Arabs saw them as part of a funeral procession. In Hindu astronomy, the stars have special names called the Saptarshi.

The Big Dipper appears on many flags and logos, like the Alaska flag and the Flag of the Community of Madrid in Spain. It also inspired the nickname of the main character in the Disney show "Gravity Falls", Dipper Pines, because of a birthmark on his forehead that looks like the Big Dipper.