The Great Diamond, or Diamond of Virgo, is a prominent spring asterism formed by the bright stars Cor Caroli in Canes Venatici constellation, Arcturus in Boötes, Spica in Virgo, and Denebola in Leo. The asterism shares the stars Arcturus and Spica with the Spring Triangle, an asterism formed by these two stars with Regulus, the brightest star in Leo.
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Comet Catalina (C/2013 US10) is a comet from the Oort Cloud currently making its first and only visit to the inner solar system. The comet was first discovered on October 31, 2013 by the Catalina Sky Survey using a 27-inch Schmidt-Cassegrain telescope. At the time of discovery, it had an apparent magnitude of 19. Since September 2015, it has been around magnitude 6.
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Arcturus, Alpha Boötis, is the brightest star in Boötes constellation and the fourth brightest star in the sky.
With an apparent magnitude of -0.04, Arcturus is the brightest star in the northern celestial hemisphere. (The three brightest stars – Sirius in Canis Major, Canopus in Carina, and Alpha Centauri in Centaurus – lie south of the celestial equator.)
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The Sunflower Galaxy, also known as Messier 63 (M63), is a bright spiral galaxy located in the constellation Canes Venatici. The galaxy lies at a distance of 37 million light years from Earth and has an apparent magnitude of 9.3. It has the designation NGC 5055 in the New General Catalogue.
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It is a blue subgiant star located at a distance of 262 light years from Earth. Spica is really a close binary star system. It is one of the nearest massive binary stars to the solar system.
The name Spica (pronounced /ˈspaɪkə/) comes from the Latin phrase spīca virginis, meaning “Virgo’s ear of grain.” The Latin word spicum refers to the ear of wheat Virgo holds in her left hand. In Greek and Roman mythology, the constellation and the star were associated with Demeter (Ceres), the goddess of the harvest.
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The Whirlpool Galaxy, also known as Messier 51 (M51) and NGC 5194, is a grand-design spiral galaxy in Canes Venatici. The galaxy appears face-on when seen from Earth. Its designation in the New General Catalogue is NGC 5194. The galaxy lies about 23 million light years from Earth. It was named the Whirlpool because of its swirling spiral structure.
The Whirlpool Galaxy is one of the brightest and most famous galaxies in the night sky, notable for its two striking spiral arms that make M51 a grand design galaxy. The spiral arms are really lanes of stars and starburst regions interspersed with dust. They compress hydrogen gas and are responsible for creating new clusters of stars.
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