The Big Dipper forms from seven stars: Alkaid, Mizar, Alioth, Megrez, Phad, Merak and Dubhe. The stars in the Big Dipper appear in skies over the Northern Hemisphere, arranging in a distinct pattern that forms the handle and bowl of the Dipper. In addition to forming the Big Dipper, these stars point toward Polaris, the North Star, providing a sense of direction and orientation.Continue Reading
As with constellations and stars in the sky, the position of the Big Dipper in the sky changes throughout the year. In the warmer months of spring and summer, the Big Dipper appears high in the sky and shines brightest. During the colder months of fall and winter, it shines less brightly and hovers just above the horizon line. Even at its lowest point in the winter sky, the Big Dipper remains circumpolar, meaning none of its points dip below the horizon line.
This unique arrangement of stars contains seven major stars, which derive their names from different origins, including Arabic and Latin. Its two most prominent stars include Alkaid, which forms the tip of its handle and Dubhe, which extends farthest from Alkaid. Dubhe, in Arabic, translates to "Great Bear." Dubhe classifies as a pointer star, along with nearby Merzak. These two stars lead to Polaris, the North Star, and to Regulus, a star in the constellation Leo.Learn more about Astronomy
The constellation Ursa Major, also known as "the Big Dipper," changes position continuously as seen from Earth. According to EarthSky, the Big Dipper is always visible on clear nights from North America. The apparent motion of the constellation is caused by three factors: the Earth's rotation on its axis, its revolution around the sun and, on a much longer timescale, the relative motions of the stars themselves.Full Answer >
Galaxies are composed of gas, dust, dark matter and a multitude of stars and solar systems, all held together by gravity. Galaxies vary greatly in size, containing approximately 10 million to 10 trillion star systems. The Milky Way galaxy, of which Earth's solar system is a part, contains about 200 billion stars.Full Answer >
The astronomical telescope is a central apparatus used to study distant planets, stars and moons from the Earth. Astronomer Galileo Galilei famously used the earliest telescopes in 1610 to prove the heliocentric solar system theory put forth by Nicolaus Copernicus in the early 16th century.Full Answer >
The Milky Way galaxy contains between 100 billion and 400 billion stars. There is only a tiny fraction of those stars can be named, of course, which is why names are generally only assigned to stars that stand out for some reason as being exceptional.Full Answer >