The nebula that appears to look like a planet in the eyes of the telescope is called planetary or planetary nebula. At the center of which there are stars like the sun but dying.
The planetary nebula seen in the film is one of the brightest planetary nebula in the sky. Its official name in the Cygnus Terracotta NGC 7027. Astronomers have studied in the film taken through the Hubble telescope, the nebula's inner star flown out its exterior just 600 years ago and has been creating gases around it. The mass of the star is about 3 times the sun.
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From @emamuddin