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You entered: planetary system
![Комета, Сова и галактика](https://images.astronet.ru/pubd/2016/04/21/0001361027/Comet_C2014_S2_PANSTARRS1024.preview.jpg)
21.04.2016
Comet C/2014 S2 (PanSTARRS) poses for a Messier moment in this telescopic snapshot from April 18. In fact it shares the 1.5 degree wide field-of-view with two well-known entries in the 18th century comet-hunting astronomer's famous catalog.
![Волны плотности в кольцах Сатурна на изображениях Кассини](https://images.astronet.ru/pubd/2017/08/17/0001388098/RingWaves_CassiniLakdawalla_960.preview.jpg)
8.08.2017
What causes the patterns in Saturn's rings? The Cassini spacecraft, soon ending its 13 years orbiting Saturn, has sent back another spectacular image of Saturn's immense ring system in unprecedented detail. The physical cause for some of Saturn's ring structures is not always understood.
![Спектр Новой Дельфина](https://images.astronet.ru/pubd/2013/08/23/0001292214/nova_del_labels_Alean.preview.jpg)
23.08.2013
When a new star appeared in the constellation Delphinus late last week, astronomers found its spectrum hinted at the apparition's true nature. Now known as Nova Delphini, its visible light spectrum near maximum...
![Парад планетарных туманностей](https://images.astronet.ru/pubd/2004/10/09/0001199914/pn_block.preview.gif)
3.10.2001
What do the Owl, the Cat's Eye, the Ghost of Jupiter, and Saturn have in common? They're all planetary nebulae of course(!), glowing gaseous shrouds shed by dying sun-like stars as they run out of nuclear fuel.
![Парад планетарных туманностей](https://images.astronet.ru/pubd/2003/06/14/0001190906/pn_block.preview.gif)
14.06.2003
What do the Owl, the Cat's Eye, the Ghost of Jupiter, and Saturn have in common? They're all planetary nebulae of course, glowing gaseous shrouds shed by dying sun-like stars as they run out of nuclear fuel.
![Прямоугольные горные хребты на Марсе](https://images.astronet.ru/pubd/2002/10/01/0001179942/incacity_msss.preview.jpg)
1.10.2002
What could cause rectangular ridges on Mars? As data flows in from the two spacecraft currently orbiting Mars, surface structures are seen that are not immediately understood. These structures pose puzzles that planetary geologists are eager to solve, as they might provide clues to past processes that have shaped Mars over billions of years.
![Овраги на Марсе](https://images.astronet.ru/pubd/2002/10/24/0001180583/marsgullies42_mgs.preview.jpg)
24.10.2002
The Gullies of Mars would probably not have been sensational enough for the title of a vintage Edgar Rice Burroughs story about the Red Planet. But it would get the attention of planetary scientists today.
![В сиянии α Центавра](https://images.astronet.ru/pubd/2012/06/28/0001266520/AlphaCenHe2111_lorenzi900.preview.jpg)
28.06.2012
The glare of Alpha Centauri, one of the brightest stars in planet Earth's night sky, floods the left side of this southern skyscape. A mere 4.3 light-years distant, Alpha Centauri actually consists of two component stars similar in size to the Sun, locked in a mutual orbit.
![NGC 6302: туманность Бабочка](https://images.astronet.ru/pubd/2003/09/09/0001192863/butterfly_vlt_big.preview.jpg)
2.06.1998
The Butterfly Nebula is only thousands of years old. As a central star of a binary system aged, it threw off its outer envelopes of gas in a strong stellar wind. The remaining stellar core is so hot it ionizes the previously ejected gas, causing it to glow.
![M57: туманность Кольцо](https://images.astronet.ru/pubd/2003/09/08/0001192832/ring_hst_big.preview.jpg)
4.05.1998
It looked like a ring on the sky. Hundreds of years ago astronomers noticed a nebula with a most unusual shape. Now known as M57 or NGC 6720, the gas cloud became popularly known as the Ring Nebula.
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