Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. To investigate this, astronomers used the Hubble Space Telescope to image several young planetary nebulae . These nebulae are the outer envelopes of stars like our Sun that have recently been cast away to space, leaving behind a core fading to become a white dwarf . The complexity of this nebula leads some astronomers to hypothesize that these shells were created by high-speed, collimated outflows during a late phase of this star's evolution .
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