Astrophotographers Andrew McCarthy and Tom Williams have published a series of fascinating images. They demonstrate the transit of the ISS against the background of the Sun.
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The pictures were taken on April 4, 2023. In order to capture the ISS, the photographers used a combination of several telescopes and special filters that transmit light only at a certain wavelength.
In the photos of Andrew McCarthy, the ISS “poses” against the background of a group of sunspots. They arise due to the release of magnetic fields into the photosphere, which suppress the movement of matter, which leads to a decrease in temperature by 1500 – 2000 degrees. A cooler area emitting less energy is perceived as a dark spot against the background of the rest of the solar surface.
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In the picture of Tom Williams, the ISS is adjacent to the prominence. This is the name of a plasma cluster that is held above the solar surface by a magnetic field. The height of the largest such structures can reach 1.7 million km, which is larger than the diameter of the Sun.
![](https://universemagazine.com/wp-content/uploads/2023/04/fs445e5wiboehl7-1024x917.jpg)
Earlier we talked about a giant coronal hole on the Sun, which would fit 20 Earths.
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