planetary nebulae

This Hubble Space Telescope image reveals "The Cat's Eye Nebula" to be one of the most complex "planetary nebulae" known.

This image from the Hubble Space Telescope reveals the Cat&squots Eye Nebula to be one of the most complex planetary nebulae known.

These planetary nebulae hint at the fate of our own Sun as its core runs out of nuclear fuel in another 5 billion years.

Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry .

Both are planetary nebulae, gaseous shrouds cast off by dying sunlike stars, and are similar in physical size, at a light-year or so across.

and planetary nebulae, in which a dying star has thrown off its outer layers, with the exposed hot core then ionizing them.

Until recently, it was thought that such shells around planetary nebulae were a rare phenomenon.

Planetary nebulae have long been appreciated as a final phase in the life of a sun-like star.

Planetary nebulae fade away gradually over tens of thousands of years.

Planetary nebulae are created by sun-like stars in a final phase of stellar evolution.

Tne binary interactions play an important role in the formation and shaping of planetary nebulae(PNe).

l The Ring nebula in Lyra is the best-known of the planetary nebulae.

NGC 2818 is one of very few planetary nebulae in our galaxy located within an open cluster.

Astronomers used the Hubble Space Telescope to make a series of images of planetary nebulae in the mid-1990s, including this one.

Stars that form planetary nebulae typically live for billions of years.

In 1995, astronomers used the Hubble Space Telescope (HST) to make a series of images of planetary nebulae, including the one above.

How planetary nebulae can form such complex structures, however, is a hot debate among professional astronomers such as Jacoby.