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Keyword: loops
![Петли солнечных пятен в ультрафиолете](https://images.astronet.ru/pubd/2006/06/13/0001214466/sun2_trace.preview.jpg)
11.06.2006
It was a quiet day on the Sun. The above image shows, however, that even during off days the Sun's surface is a busy place. Shown in ultraviolet light, the relatively cool dark regions have temperatures of thousands of degrees Celsius.
![Петля Арпа в М81](https://images.astronet.ru/pubd/2010/12/09/0001248619/lrg_ngc3031gabany900c.preview.jpg)
9.12.2010
One of the brightest galaxies in planet Earth's sky and similar in size to the Milky Way, big, beautiful spiral M81 lies 11.8 million light-years away in the northern constellation Ursa Major. This...
![Нагрев корональных петель](https://images.astronet.ru/pubd/2000/12/19/0001162418/coronaloop_trace_big.preview.jpg)
28.09.2000
Extending above the photosphere or visible surface of the Sun, the faint, tenuous solar corona can't be easily seen from Earth, but it is measured to be hundreds of times hotter than the photosphere itself. What makes the solar corona so hot?
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