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Keywords: Sun, corona, magnetic field
![Самый четкий вид Солнца](https://images.astronet.ru/pubd/2002/11/14/0001180907/sunspot_swedish_label1.preview.jpg)
14.11.2002
This stunning image shows remarkable and mysterious details near the dark central region of a planet-sized sunspot in one of the sharpest views ever of the surface of the Sun. Just released, the picture was made using the Swedish Solar Telescope now in its first year of operation on the Canary Island of La Palma.
![Солнечное пятно крупным планом](https://images.astronet.ru/pubd/2005/11/07/0001209311/sunspot_vtt.preview.jpg)
6.11.2005
Why would a small part of the Sun appear slightly dark? Visible above is a close-up picture of a sunspot, a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun.
![Острова в фотосфере](https://images.astronet.ru/pubd/2001/03/19/0001166742/sundraw_groenez.preview.jpg)
15.03.2001
Awash in a sea of plasma and anchored in magnetic fields, sunspots are planet-sized, dark islands in the solar photosphere, the bright surface of the Sun. Before the enlightened(!) age of cameras, solar observers created detailed drawings of sunspots as they changed and progressed across the visible solar disk.
![Превращение солнечного пятна: снизу вверх](https://images.astronet.ru/pubd/2005/02/16/0001202947/spotmorph_dot.preview.gif)
16.02.2005
Sunspots -- magnets the size of the Earth -- are normally seen flat on the Sun. The above digital metamorphosis, however, shows a sunspot as it appears at increasing heights, effectively in three dimensions. The above...
![Солнечное пятно детально](https://images.astronet.ru/pubd/2004/08/11/0001199051/sunspot_vtt_big.preview.gif)
5.10.1998
Sometimes, small regions of the Sun appear unusually dark. Visible above is a close-up picture of a sunspot, a depression on the Sun's face that is slightly cooler and less luminous than the rest of the Sun.
![Возвращение знаменитой активной области и вспышка класса X на Солнце](https://images.astronet.ru/pubd/2024/05/28/0001930600/flare.preview.png)
28.05.2024
It's back. The famous active region on the Sun that created auroras visible around the Earth earlier this month has survived its rotation around the far side of the Sun -- and returned. Yesterday...
![Силовые линии магнитного поля Млечного Пути](https://images.astronet.ru/pubd/2020/06/17/0001668273/PolarisedMilkyWay_Planck_1080.preview.jpg)
17.06.2020
What role do magnetic fields play in interstellar physics? Analyses of observations by ESA's Planck satellite of emission by small magnetically-aligned dust grains reveal previously unknown magnetic field structures in our Milky Way Galaxy -- as shown by the curvy lines in the featured full-sky image.
![Солнечный гелий](https://images.astronet.ru/pubd/2003/11/12/0001194977/hesun_eit_big.preview.gif)
16.05.1998
This image of the relatively quiet Sun was made using ultraviolet light emitted by ionized Helium atoms in the Solar chromosphere. Helium was first discovered in the Sun in 1868, its name fittingly derived from from the Greek word Helios, meaning Sun.
![Искривленные магнитные поля Центавра А](https://images.astronet.ru/pubd/2021/04/21/0001735557/CenA_SofiaPlus_960.preview.jpg)
21.04.2021
When galaxies collide -- what happens to their magnetic fields? To help find out, NASA pointed SOFIA, its flying 747, at galactic neighbor Centaurus A to observe the emission of polarized dust -- which traces magnetic fields.
![Корональная дыра](https://images.astronet.ru/pubd/2002/02/08/0001174658/coronahole_020108eit.preview.jpg)
7.02.2002
This ominous, dark shape sprawling across the face of the active Sun is a coronal hole -- a low density region extending above the surface where the solar magnetic field opens freely into interplanetary space.
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