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In the distant future the Sun will be many times its present size and thousands of times brighter. It will seed the Galaxy with elements like carbon and oxygen–perhaps for life on a world yet unborn. Then it will collapse into a tiny dead sphere. For a time, a beautiful nebula will mark its place.

Life and Death of the Sun

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Stars with a mass similar to that of the Sun will end up as white dwarfs and forming planetary nebulae. Here is a beautiful planetary nebula in the constellation Musca.

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Here is the Southern Ring Nebula, a planetary nebula in the constellation Antlia. (Antlia is one of the constellations invented by Nicolas Louis de Lacaille in the 18th century.) There's a bright star in the center of the picture, but it's the dim star that formed the nebula. The bright one is just a star in our line of sight.


Moderated by  Mona - Astronomy 

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