Sunspots

Let's observe sunspots.

The sun is currently in a period of low activity but even so large sunspots occasionally appear.

Sunspots are regions of the Sun where the solar magnetic field is very strong.

Sunspots appear darker than their surroundings because they are a few thousand degrees cooler.

He also discovered sunspots, the dark areas of the Sun. He saw that the planet Venus has light and dark phases just like the Moon. These discoveries provided empirical information that proved that the Sun is at the center of the Solar System, as Nicholas Copernicus had predicted.

The Sun’s magnetic field changes over a repeating 11-year cycle that causes an ebb and flow of solar activity such as sunspots, solar flares and coronal mass ejections.

Gradually, as the magnetic flux (a measurement of the quantity of magnetism) that comes up with the sunspots moves pole-ward it erodes the existing polar fields and replaces them with magnetic fields that have the opposite polarity.