The geography problem is urgent. Thank you.

The sunspot is a huge vortex airflow appearing on the photosphere, its temperature is about 1℃ lower than that of the photosphere, and its brightness is slightly darker than that of the photosphere, forming a relatively dim black spot, so people call it "sunspot" figuratively.

The size, number, position and shape of sunspots on the solar surface are different from day to day. Long-term observation of sunspots will reveal that there are many sunspots in some years and few sunspots in others.

there are usually two ways to observe sunspots: one is projection. Through a telescope, the sun is projected onto a white object for observation. The second is visual method. Install a filter on the objective lens (front) of the telescope, and then observe. This is also the way to observe the total solar eclipse. You can't look at the sun directly with the naked eye, or you may burn your eyes.

Before the total solar eclipse, you can see the whole face of the sun through scientific instruments. This is a good opportunity to see sunspots. Sunspots are areas with relatively low temperature on the surface of the sun, which are darker than other dazzling photospheres.

Because the projection method is a common method, researchers should adopt a more accurate visual method. When observing the total solar eclipse, by observing the size, number, position and shape of sunspots on the solar surface, the viewpoint that sunspot activity is at a low point is verified.