Cassiopeia can be seen in the south of China?

Yes, but sometimes you can't tell. You can see it at 40 degrees north latitude and its north. Details are as follows: Cassiopeia, one of the polar constellations. Located in the south of Andromeda and the north of Andromeda, it is far opposite to Ursa major, and can be seen all year round, especially in autumn, because it is close to the north celestial pole. The five bright stars in Cassiopeia form an "M" shape, so it is not difficult to find it. The sharp angle of "M" refers to the direction of the North Celestial Pole, so Cassiopeia is also one of the important signs for finding the North Star. Cassiopeia had a supernova explosion in 1572. This supernova can be seen even during the day, and it is brighter than Venus at its brightest. But 17 months later, this supernova is too dark to be seen by the naked eye. It was not until 380 years later that astronomers discovered a powerful radio source at this location, which is the remnant of this supernova explosion. Cassiopeia is a constellation comparable to the Big Dipper. There are at least one hundred stars that can be seen clearly with the naked eye, but only six or seven are particularly bright. Among them, three second-class stars and two third-class stars form an obvious English capital letter "W", which is the most important symbol to identify Cassiopeia. Cassiopeia can also be found in this way: extend the connection line between the celestial pole of the Big Dipper and the Polaris to the south by about the same length, and you can reach Cassiopeia on the shore of the Milky Way. Cassiopeia's position in the celestial sphere extends northward. In autumn, the quadrilateral γ Pegasus and α Andromeda have a bright 2m star, which is β Cassiopeia (Polaris can be seen farther north along this line). The five brightest stars in Cassiopeia, β, α, γ, δ and ε, form the shape of an English letter "M" or "W", which is the most prominent symbol of Cassiopeia. The "W" of Cassiopeia is far away from the Big Dipper, so when Cassiopeia rises to the zenith in autumn, the Big Dipper is at the lowest place in the sky, even in the south of China. Without Beidou, you can connect the midpoint of the δ star with the ε and γ stars and extend northward to find the Polaris. 1572165438+1October 1 1, that is, in the Ming Dynasty, a new star that could be seen in the daytime suddenly appeared in Cassiopeia. Three weeks after the star appeared, it began to dim slowly, and it didn't disappear from people's view until March after 1574 and 17 months (this sudden "bright star" is called "supernova explosion" in astronomy). But 380 years later, radio wave radiation was found in this position, which is a powerful radio source, called Cassiopeia B radio source, which is the residue after supernova explosion. Casio poya