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Keywords: open cluster, M 46, planetary nebula
![Планетарная туманность NGC 2438](https://images.astronet.ru/pubd/2011/04/07/0001251033/NGC2438_IAC80_DLopez900.preview.jpg)
7.04.2011
NGC 2438 is a planetary nebula, the gaseous shroud cast off by a dying sunlike star billions of years old whose central reservoir of hydrogen fuel has been exhausted. About 3,000 light-years distant it lies within the boundaries of the nautical constellation Puppis.
![Туманность Пузырь и M52](https://images.astronet.ru/pubd/2011/09/14/0001253702/bubbleM52_fenyes900.preview.jpg)
14.09.2011
To the eye, this cosmic composition nicely balances the Bubble Nebula at the lower right with open star cluster M52. The pair would be lopsided on other scales, though. Embedded in a complex...
![M6: скопление Бабочка](https://images.astronet.ru/pubd/2011/09/06/0001253584/m6_eguivar_900.preview.jpg)
6.09.2011
To some, the outline of the open cluster of stars M6 resembles a butterfly. M6, also known as NGC 6405, spans about 20 light-years and lies about 2,000 light years distant.
![M27: не комета](https://images.astronet.ru/pubd/2011/09/01/0001253522/M27NarrowBroad_pugh900.preview.jpg)
1.09.2011
While hunting for comets in the skies above 18th century France, astronomer Charles Messier diligently kept a list of the things he encountered that were definitely not comets. This is number 27 on his now famous not-a-comet list.
![M27: туманность Гантель](https://images.astronet.ru/pubd/2016/11/02/0001371138/M27_Hayes_960.preview.jpg)
2.11.2016
The first hint of what will become of our Sun was discovered inadvertently in 1764. At that time, Charles Messier was compiling a list of diffuse objects not to be confused with comets.
![M2-9: крылья туманности Бабочка](https://images.astronet.ru/pubd/2016/07/28/0001366504/m2d9_hubble_960.preview.jpg)
24.07.2016
Are stars better appreciated for their art after they die? Actually, stars usually create their most artistic displays as they die. In the case of low-mass stars like our Sun and M2-9 pictured above, the stars transform themselves from normal stars to white dwarfs by casting off their outer gaseous envelopes.
![M7: рассеянное звездное скопление в Скорпионе](https://images.astronet.ru/pubd/2016/07/14/0001365930/m7_colombari_960.preview.jpg)
13.07.2016
M7 is one of the most prominent open clusters of stars on the sky. The cluster, dominated by bright blue stars, can be seen with the naked eye in a dark sky in the tail of the constellation of the Scorpion (Scorpius).
![NGC 3132: туманность восьми вспышек](https://images.astronet.ru/pubd/2015/06/07/0001337403/ngc3132_hubble_960.preview.jpg)
7.06.2015
It's the dim star, not the bright one, near the center of NGC 3132 that created this odd but beautiful planetary nebula. Nicknamed the Eight-Burst Nebula and the Southern Ring Nebula, the glowing gas originated in the outer layers of a star like our Sun.
![Планетарная туманность Mz3: туманность Муравей](https://images.astronet.ru/pubd/2015/04/26/0001336244/ant_hubble_1072.preview.jpg)
26.04.2015
Why isn't this ant a big sphere? Planetary nebula Mz3 is being cast off by a star similar to our Sun that is, surely, round. Why then would the gas that is streaming away create an ant-shaped nebula that is distinctly not round?
![NGC 2440: жемчужина нового белого карлика](https://images.astronet.ru/pubd/2015/05/17/0001337171/ngc2440center_hubble_960.preview.jpg)
17.05.2015
Like a pearl, a white dwarf star shines best after being freed from its shell. In this analogy, however, the Sun would be a mollusk and its discarded hull would shine prettiest of all!
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