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What can the Ant nebula tell us about our Sun? - All About Space
Are planetary nebulae made by supernovae? - All About Space
Nebula - spaceanswers.com
gas - spaceanswers.com
New confirmation of Einstein’s general theory of relativity
Star Formation
Astronomer - spaceanswers.com
life - spaceanswers.com
core - spaceanswers.com
Hydrogen - spaceanswers.com