Astronomers from the University of Glasgow have reported that they were able to measure the depth of sunspots. Back in 1769 while studying spots on the surface of the solar disk, a professor at the University of Glasgow, Alexander Wilson said that the sun spots appears to be concave.

In their study, the researchers used data collected by the mission SOHO. This device was launched in 1995, specifically for observing the Sun, and it had succeeded in obtaining the large number of photographs of heavenly body during the peak of its activity.

After building a computer model, based on observational data of more than 25 thousand sun spots, scientists concluded that the central regions of sun spots are located about 1500 km below the surface of the Sun. According to researchers, the new results will prove useful for creating the more advanced models of processes occurring on the Sun.