| A planetary nebula forms when Sun-like stars gently eject their outer gaseous layers to form bright nebulae with amazing twisted shapes. |
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| The Boomerang Nebula is a young planetary nebula and the coldest object found in the Universe so far. |
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| Astronomers call such an object a planetary nebula, because its round shape resembles that of a planet when viewed with a small telescope. |
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| In keeping with astronomical tradition, the new planetary nebula will probably be named after its lead discoverer. |
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| Sure enough, there was a huge shell of clumpy, hole-riddled gas that looked like a nearly dissipated planetary nebula. |
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| At this time the star ejects dust and gas, thereby forming a planetary nebula. |
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| But, as night follows day, or as a planetary nebula becomes a white dwarf, it has its detractors. |
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| High-resolution images of a planetary nebula usually reveal tiny knots and filaments down to the resolution limit. |
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| Lyra also contains the Ring Nebula, a planetary nebula that appears as a sphere of glowing gas. |
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| A star processes hydrogen for the majority of its life before dying quietly as a planetary nebula or violently as a supernova. |
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| Once the helium is consumed, the star will die quietly by ejecting their outer layers, creating a planetary nebula. |
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| The Sun is an ordinary low-mass star and it will most likely end its life as a spectacular planetary nebula. |
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| This planetary nebula will be visible until its gas dissipates into space over the next 10 000 years or so. |
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| For example, a planetary nebula can be seen at 450 times with a 300 as soon as conditions permit by providing a wealth of detail in the greatest comfort that can never make a smaller diameter. |
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| Some of them are similar to the Sun in its younger days, others look like the Sun at the end of its life: a star which will have ejected its external layers to become a planetary nebula. |
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| Gradual mass change occurs when a star becomes a giant star and ejects a planetary nebula, leaving behind a lower mass white dwarf. |
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| It is a planetary nebula – the gaseous shroud of a dying, sun-like star. |
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| One of the biggest and brightest planetary nebula visible from the nord hemisphere. It is located in the Cygnus constellation, close to the center of the Milky Way. |
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| Low mass stars will go through a phase of being a planetary nebula, by ejecting layers of gas that are illuminated by the star itself, before ending up as a white dwarf. |
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| Despite the name, a planetary nebula has nothing to do with a planet. |
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| A very faint planetary nebula, NGC 7094, can be spotted less than 2 degrees further north-east. |
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| As it pulses, Chi Cygni is puffing off its outer layers, which in a few hundred thousand years will create a beautifully gleaming planetary nebula. |
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