A three trillion mile-long jet called HH-47 resembles a glowing worm in this NASA Hubble Space Telescope image. Jets are common around newly formed stars. They are the exhaust product of the chaotic formation of the star.
Stars like our Sun will die one day when they have used up all of their hydrogen and helium fuel for nuclear fusion. For our Sun, that day is four billion years in the future but all around the galaxy, astronomers find other stars moving through that stage of star life. The Rotten Egg Nebula, shown in this NASA/ESA Hubble Space Telescope image, is a planetary nebula in the making.
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