Fully active: Solar eclipse photos show sunspots and solar flares.

On August 2, 20654381day, the moon began to eclipse, and some sunspots appeared on the surface of the sun. (john mitchell) The sun performed a wonderful performance on August 2nd1day, which was not only in the category of "total solar eclipse". Photographs taken from the path of the total solar eclipse during the eclipse reveal a series of activities, from sunspots to solar flares, which are the closest stars on earth.

These photos were taken by john mitchell, an amateur photographer and the author's father-in-law, on the Whole Food Path south of Thermopolis, Wyoming. In the early days of the partial solar eclipse, Mitchell captured a series of black spots on the surface of the sun. These are sunspots, areas where the surface temperature of the sun is lower than other surfaces. According to the data of the Space Weather Forecast Center, sunspots may hover at a temperature of about 6,200 degrees Fahrenheit (3,430 degrees Celsius), while the temperature of other parts of the sun's surface is10,300 degrees Fahrenheit (5,700 degrees Celsius).

Sunspots are short-lived, but they happen all the time, not just during solar eclipses. They are caused by the change of the sun's magnetic field: where the magnetic field is strong, it actually stops the heat inside the sun. [Photo: 20 17 American solar eclipse]

The fluctuation period of solar activity is 1 1 year, and the number of visible sunspots on the star surface depends on the time in this so-called solar cycle. Since 2008, the sun is now close to the minimum of its current cycle. This cycle is called solar cycle 24, so it is named because it is the 24th cycle since 1755 started the routine recording of sunspots.

Since the moon covered almost a small part of the sun from Wyoming's vantage point on August 2 17, solar flares can be seen in the upper right quadrant of the sun's surface. (john mitchell) When the solar activity is the least, the solar magnetic field is weakened and there are relatively few sunspots. However, according to NASA, the lowest point of the current solar cycle may still come. The agency said that the number of sunspots is expected to reach the lowest value sometime between 20 19 and 2020.

Solar flares will also be captured by cameras during solar eclipses, and the frequency will also decrease during the period of minimum solar activity. However, at the last moment when the sun completely disappeared behind the moon on August 2 1 day, a solar flare could be seen in the upper right quadrant of the sun.

These flares are sudden bursts of magnetic field energy, accompanied by the release of a lot of light and solar particles. According to NASA, some particles and electromagnetic energy from large solar flares can interact with the upper atmosphere of the earth, which will destroy satellite transmission. Solar flares are related to sunspots: they are regarded as release valves for all suppressed electromagnetic energy, which darkens the surface of the sun.

Black and white photo of total solar eclipse taken near Thermopolis, Wyoming. Solar flares can be seen in the coronal light around the sheltered sun. According to NASA, minimum solar activity is notorious for allowing coronal holes to develop. The corona is the atmosphere of the sun (observers of the latest total solar eclipse will remember it as a white filament around the blackened sun). The coronal hole is a cold spot in the atmosphere from which the solar wind can escape. Conversely, the solar wind is a stream of charged particles, which can hit the upper atmosphere of the earth and cause disturbances such as aurora, which is a flashing ribbon, also known as the Northern Lights or the Southern Lights.

This is an original article about life science.