| 41. | They just turn into a planetary nebula.
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| 42. | The Blue Snowball Nebula, a planetary nebula, is visible in a telescope as a blue circular object.
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| 43. | N . J . Martin described IC 289 as " A nice, faint round planet like planetary nebula.
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| 44. | This planetary nebula is of historical interest following its discovery by German-born English astronomer William Herschel in 1790.
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| 45. | Then, for a relative blink of about 1, 000 years or less, the star becomes a planetary nebula.
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| 46. | For a typical planetary nebula, about 10, 000 years passes between its formation and recombination of the star.
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| 47. | In planetary nebula NGC 6565, a cloud of gas was ejected from the star after strong stellar winds.
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| 48. | It was identified as a planetary nebula due to its strong radiation in the OIII ( oxygen ) bands.
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| 49. | NGC 6326, a planetary nebula with glowing wisps of outpouring gas that are lit up by a binary central star
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| 50. | V605 Aquilae is at the centre of a planetary nebula and is believed to be the source of the nebula.
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