The term Planetary Nebula is one type of Nebulae (Not nebulas), which are large clouds of ice and dust that have been created in the aftermath of the death of a star. Although their name includes “planet”, they are nothing to do with planets. They do get their name from the mistaken...
the planetary nebula ceases to exist, and only the core of the star remain. This core is known as awhite dwarf, and it gradually fades over time until it no longer produces any light.
The search for old planetary nebulae around hot white dwarfs, PG 1159 stars, and sdO stars is subject of intensive studies (e.g. Kwitter et al. 1989). We report here on the discovery of such a nebula around the white dwarf GD 561....
An Emissions Nebula produces its own light, whereas a Reflection Nebula glows because of light from a source outside the Nebula. Solar System Nebula Theory It is theorized that theSolar Systemwas created from a nebula billions of years ago. TheUniverseis 13.8 billion years old, and the general...
Another type of diffuse nebula, a reflection nebula doesn’t emit its own light, but scatters light from embedded stars. (Image credit: NASA, JPL-Caltech, Kate Su (Steward Obs, U. Arizona) et al.) Planetary nebula: The Helix Nebula This is composed of expanding gas that was blown off...
We report the results of a sensitive survey of planetary nebulae in all four ground state OH lines. Our results confirm that evolved planetary nebulae are not OH sources in general. However, we did detect one interesting object: an OH 1612 MHz maser in the young planetary nebula NGC 6302. ...
la within a cluster A planetary nebula within a clusterA planetary nebula within a clusterNASA
The first planetary nebula was discovered in 1764 by noted astronomers Charles Messier. But it was not until 1790 that the 18th-century astronomer William Herschel discovered that the objects were made up of gas and dust. Herschel, who had recently discovered the planet Uranus at the time, ...
Planetary Nebulae: ClassificationPlanetary Nebulae: Finding ChartsNo abstract is available for this article.doi:10.1002/asna.19001531907R. G. AitkenJohn Wiley & Sons, LtdAstronomische Nachrichten
When fusing gets to Iron, it cannot transform anymore and, as such, dies, first growing into a supergiant and then becoming a Planetary Nebula or if it was massive enough go supernova, leaving behind a supernova remnant like Crab Nebula. Our Sun will become a planetary nebula....