Introduction to Cepheus, one of the polar constellations.

The knowledge brought by this astronomical phenomenon is a brief introduction to Cepheus, one of the polar constellations. Cepheus is one of the polar constellations, and its alpha star is Tengu V. The whole constellation can be seen all year round, especially in autumn night. It is next to the North Star, far from the Big Dipper. Cepheus is one of the arch constellations, and its alpha star is Tengu V. The whole constellation can be seen all year round, especially in autumn night. It is next to the North Star, far from the Big Dipper. Most of Cepheus is submerged in the Milky Way, forming a slender and skewed pentagon. The most beautiful celestial body in Cepheus is the Iris Nebula, also known as the Rainbow Nebula (NGC7023), which is located in the star-rich area of Cepheus 1300 light years away. Nebula material surrounds a huge, hot, apparently still in the formation stage, leaking secret red light, telling us that a large number of hydrogen atoms are excited by invisible but strong ultraviolet light emitted by the star on both sides of the bright central region of the star. Celestial name: Cepheus Latin name: Cep symbol: King Right ascension: 22h area: 588 area ranking: 27th bright star number: 1 brightest star: Cepheus alpha star (hook 5) meteor shower: unconnected constellations: Ursa minor, Cygnus, Scorpio, Cassiopeia and Lupo constellations The best observation time is from September to 65438. Optimum observation latitude: between+90 and-10; The magnitude of the brightest star: 2.44 Iris Nebula, also known as Rainbow Nebula and Blue Iris Nebula, is a bright star cloud located in Cepheus. Elephant trunk nebula, numbered IC 1396, is about 2400 light years away from the earth and has a brightness of 3.5. It is a star-forming region composed of gas and dust clouds.