Is Ursa major in the Milky Way?

There are two spiral galaxies in Ursa major: M8 1 of 8 and M10/of 9, which are definitely not in the Milky Way.

The ancients regarded the Big Dipper as an eternal sacred symbol. Will the figure of the Big Dipper never change? Will it always be a "tool" to find the North Star? Of course not. Everything in the universe is moving, and stars are no exception. Since the stars are also moving, the pattern of the Big Dipper is certainly changing.

The Big Dipper is constantly changing.

In fact, the distances between these seven stars and the earth are different, ranging from 60 light-years to 200 light-years, and their respective directions and speeds are also different. Seven stars generally run in two directions, Yaoguang and Shu Tian are in one direction, and the other five are basically in the same direction. According to their running speed and direction, astronomers calculated that the patterns they formed 654.38 million years ago and 654.38 million years later were very different from today's patterns. After 65438+ million years, we may not see this shape of handle spoon.