Bright green dust and gas surrounds an inner shell of tightly wound dust and gas, in the center of it all is a bright purple star.

Hubble Caldwell 15

A blinking remnant star, called a white dwarf, sits at the heart of this colorful nebula.

Credits: NASA, ESA, B. Balick and J. Alexander (University of Washington), A. Hajian (U.S. Naval Observatory), Y. Terzian (Cornell University), M. Perinotto (University of Florence), and P. Patriarchi (Arcetri Observatory)
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Image CreditNASA, ESA, B. Balick and J. Alexander (University of Washington), A. Hajian (U.S. Naval Observatory), Y. Terzian (Cornell University), M. Perinotto (University of Florence), and P. Patriarchi (Arcetri Observatory)
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