The name "planetary nebula" is a misnomer — such nebulas ... which is puffed off into space following the star's red giant ...

A planetary nebula marks the end of 90% of all stars active lives and traces the star’s transition from a red giant to a degenerate white dwarf. But, for years, scientists weren’t sure if the sun in ...

The team's findings indicate that roughly 6,000 years have elapsed since the dying star, then a red giant, ejected the ... "The stars that generate planetary nebulae like the Ring and Southern ...

The SMA data also reveal telltale signatures of the influence of a companion star to the former red giant at the center of the nebula ... “The stars that generate planetary nebulae like the Ring and ...

"Planetary nebulae were once thought to be simple, round objects with a single dying star at the center," astronomer Roger Wesson of Cardiff University said in a previous statement. "It begs the ...

At this stage, the star becomes a large red giant. Because a red giant is ... which creates an expanding shell of gas called a planetary nebula. Within this nebula, the hot core of the star ...