SSC
The constellation 'Ursa Major' is also known as the:
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Answer: Option C — Great Bear
Detailed Solution
Ursa Major is a Latin name meaning "Great Bear" (ursa = bear, major = greater). It is one of the best-known constellations of the northern sky.
The Big Dipper (Saptarishi):
- Seven bright stars of Ursa Major form a pattern called the Big Dipper or the Plough.
- In India, these seven stars are called the Saptarishi Mandal, after the seven great sages of Hindu tradition.
- The seven stars are Dubhe, Merak, Phecda, Megrez, Alioth, Mizar and Alkaid (also called Benetnasch).
Finding the Pole Star:
- The two stars at the end of the "bowl" of the Big Dipper, Dubhe and Merak, are called the "pointers".
- A line drawn through them and extended about five times their distance leads to the Pole Star (Polaris).
- The Pole Star is part of Ursa Minor, the Little Bear.
Visibility:
- Ursa Major is visible throughout the year from most of the Northern Hemisphere.
- In India, it is best seen in the early part of the night during summer, in the northern sky.
Size:
Ursa Major is the third-largest of the 88 officially recognised constellations, after Hydra and Virgo. It is the largest constellation in the northern sky.
Mythology:
- In Greek mythology, Ursa Major is linked with Callisto, who was turned into a bear.
- Many cultures see different shapes in it: a plough in Britain, a saucepan in some places and a group of sages in India.
What is a constellation:
- A constellation is a group of stars that forms a recognisable pattern in the night sky.
- The International Astronomical Union (IAU) recognises 88 constellations.
- The stars of a constellation only appear close together; they may actually lie at very different distances from the Earth.
Why not the other options?
- ✗Little Bear is Ursa Minor, which contains the Pole Star.
- ✗Swan is the meaning of Cygnus.
- ✗Scorpion is Scorpius.
Quick tip
Remember: Ursa Major = Great Bear = Saptarishi (Big Dipper); its pointer stars lead to the Pole Star in Ursa Minor.
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