planetary nebula

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  • noun

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a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star

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References in periodicals archive ?
Caption: The view through a 15-inch reflector at 216x reveals the dim 13.6-magnitude star at the center of the planetary nebula NGC 7094.
Studying the planetary nebula HuBi 1 (17,000 light years away and nearly 5 billion years ahead of our solar system in evolution), however, Dr MartE[degrees]n Guerrero et al.
While supernovas are capable of forging the heaviest elements, planetary nebulas contain a large proportion of the lighter 'elements of life' such as carbon, nitrogen, and oxygen, made by nuclear fusion in the parent star.
(5.) Bentley AF: A Search for Cool Companions of Planetary Nebula Nuclei (abstract) Proc 13 1st Symp of the IAU, Oct 5-9, 1987 (Torres-Peimbert, Ed) Boston: Kluwer Academic Publ, p 312, 1989.
This bright (8th-magnitude) planetary nebula in the neck of Draco, the Dragon, is one of the most popular planetaries in the northern sky.
Astronomers studying the dynamics of a distant star recently spotted a strange cosmic feature 6 a planetary nebula that appears to have formed inside out.
A team of international astronomers predicts it will turn into a massive ring of luminous, interstellar gas and dust, known as a planetary nebula.
ALABAMA (CyHAN)- This is a video zoom into the region of sky containing the planetary nebula NGC 5189.
A very special planetary nebula is situated virtually in the midst of the flames, so to speak, halfway between the two stars.
As noted in the January Sky Diary on page 14, a planetary nebula is an immense shell of gas that has been ejected from a dying star.
HUBBLE BONANZA--The Cat's Eye planetary nebula features shells, jets, and knots of gas generated by a dying star (top).
He writes that the nebula's hard edge "coupled with its internal complexity but otherwise smooth outer ring" led him to dub this wonderful little planetary nebula the Snowglobe Nebula.
Instead, this natural phenomenon occurred in a well-known planetary nebula, Mz 3, which is more commonly known as the Ant Nebula, given its shape that resembles the common garden-variety ant.
The Boomerang Nebula, located about 5,000 light-years away in the constellation Centaurus, is a relatively young example of an object known as a planetary nebula.
This is not true however, and one particularly beautiful object, certainly in a large telescope, is the planetary nebula NGC 7662--commonly known as the Blue Snowball.