Sunspots

"Dark Gaseous Masses"(sunspots) in the sun

Starting from around 140 B.C, Chinese astronomers have started making observations on thesunspots in the sun. Using only their naked eyes, they have made keen observations of the sunspots' duration. There are three main books that have made written history on the observations(Please refer to the table below).

Title
Contents and quotes
Han Shu(History of the Han Dynasty)
It states that in the third month of 28 B.C., " the sun bore a yellowish color when it rose and a mass of dark gas was observed at its center."
Han Shu(History of the Han Dynasty)
In the first month of A.D. 188, "the sun wore the color of orange and there was seen in its center a dark gaseous mass in the shape of a flying magpie, which remained until several months later."
Huai Nan Zi( THe Book of the Prince of Huai Nan)
It states that the appearance of the sunspots as a perching crow
Song Shu(History of the Song Dynasty)
"Black spots as big as a plum", and "Didn't vanish until three days later."