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Keywords: planetary nebula, supernova remnant
![NGC 2346: планетарная туманность в форме бабочки](https://images.astronet.ru/pubd/2001/11/02/0001172424/ngc2346_heritage.preview.jpg)
28.10.2001
It may look like a butterfly, but it's bigger than our Solar System. NGC 2346 is a planetary nebula made of gas and dust that has evolved into a familiar shape. At the heart of the bipolar planetary nebula is a pair of close stars orbiting each other once every sixteen days.
![Планетарная туманность Mz3: туманность Муравей](https://images.astronet.ru/pubd/2005/05/03/0001205445/mz3_hst.preview.jpg)
1.05.2005
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 6826: Мигающий Глаз](https://images.astronet.ru/pubd/2001/05/26/0001168383/ngc6826_hst.preview.jpg)
26.05.2001
The colorful planetary nebula phase of a sun-like star's life is brief. Almost in the "blink of an eye" - cosmically speaking - the star's outer layers are cast off, forming an expanding emission nebula. This nebula lasts perhaps 10 thousand years compared to a 10 billion year stellar life span.
![IC 418: Туманность Спирографа](https://images.astronet.ru/pubd/2000/12/19/0001162437/spirograph_heritage_big.preview.jpg)
7.09.2000
What is creating the strange texture of IC 418? Dubbed the Spirograph Nebula for its resemblance to drawings from a cyclical drawing tool, planetary nebula IC 418 shows patterns that are not well understood. Perhaps they are related to chaotic winds from the variable central star, which changes brightness unpredictably in just a few hours.
![IC 418: Туманность Спирограф](https://images.astronet.ru/pubd/2002/12/14/0001181294/spirograph_heritage.preview.jpg)
13.12.2002
What is creating the strange texture of IC 418? Dubbed the Spirograph Nebula for its resemblance to drawings from a cyclical drawing tool, planetary nebula IC 418 shows patterns that are not well understood. Perhaps they are related to chaotic winds from the variable central star, which changes brightness unpredictably in just a few hours.
![Жуткий расширяющийся Кошачий глаз](https://images.astronet.ru/pubd/2006/11/13/0001217721/catseye_expand.preview.gif)
16.09.1999
Watch closely. As this animation blinks between two Hubble Space Telescope images of NGC 6543 - the first from 1994 and the second from 1997 - the intricate filaments of this nebula are seen to shift. The shift is due to the actual expansion of this gaseous shroud shed by a dying star!
![Кольцевая туманность M57](https://images.astronet.ru/pubd/2004/07/04/0001198613/m57ring_hst.preview.jpg)
4.07.2004
Except for the rings of Saturn, the Ring Nebula (M57) is probably the most famous celestial band. This planetary nebula's simple, graceful appearance is thought to be due to perspective -- our view from planet Earth looking straight into what is actually a barrel-shaped cloud of gas shrugged off by a dying central star.
![В центре туманности Гантеля](https://images.astronet.ru/pubd/2004/08/11/0001199067/m27center_vlt_big.preview.jpg)
13.10.1998
Here's part of the Dumbbell Nebula that you can't see through binoculars. To see this, we suggest a sophisticated spectrograph attached to a telescope with an 8-meter aperture. Pictured above is the central part of the Dumbbell Nebula, also known as M27 and NGC 6853.
![MyCn18: Туманность Песочные Часы](https://images.astronet.ru/pubd/2001/03/15/0001166625/mycn18_hst_big.preview.jpg)
4.06.2000
The sands of time are running out for the central star of this hourglass-shaped planetary nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a Sun-like star's life occurs as its outer layers are ejected - its core becoming a cooling, fading White Dwarf.
![NGC 2440: кокон вокруг нового белого карлика](https://images.astronet.ru/pubd/2005/01/23/0001202491/ngc2440_hst4.preview.jpg)
22.01.2005
Like a butterfly, a white dwarf star begins its life by casting off a cocoon that enclosed its former self. In this analogy, however, the Sun would be a caterpillar and the ejected shell of gas would become the prettiest of all!
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