The night sky is home to many celestial features named after creatures from Earth’s oceans. Among the stars, you’ll find ...

One of just a few planetary nebulae in Charles Messier’s catalog, the Ring Nebula (M57) looks just as its name indicates: a ring-shaped cloud in space, glowing green. Mark Hanson ...

Planetary Nebula: An ionised shell of gas expelled by a dying star in the late stages of stellar evolution. Central Star: The remnant core of a star that emits high-energy radiation, ...

Planetary nebula: The Helix Nebula. This is composed of expanding gas that was blown off by a star as it collapsed to a white dwarf. (Image credit: NASA, ESA, J. Hester, A. Loll (ASU)) ...

The planetary nebula K4-47 is enriched in 13C, 15N and 17O isotopes. Observations reveal that a particular planetary nebula — the ejected envelope of an old star — is unusually enriched in ...

Gazing into a planetary nebula 2,500 light-years away in space may remind people the sun will eventually die, too. WIll it also go out with a light show?

At the heart of the double-lobed Toby Jug planetary nebula is the red-giant star HR3126, which at just 50 million years old, is considerably younger than the 4.6-billion-year-old sun. HR3126 ...

The Butterfly Nebula is changing, and astronomers are puzzled as to why these changes are occurring. Observations of this planetary nebula show dramatic changes in the butterfly’s ‘wings’ in ...