Planetary Nebulae Click icon to view a planetary nebula from Messier's catalog Messier's Planetary Nebulae; Links The icon shows the Helix Nebula NGC 7293, the nearest planetary nebula. When a star like our Sun comes to age, having longly burned away all the hydrogene to helium in its core in its main sequence phase, and also (in the consequent red giant stadium), the helium to carbon and ...

The planetary nebula M57 (NGC 6720), or the Ring Nebula as it is most commonly referred to for obvious reasons, lies about 1600 light years away from the Earth. The name "planetary nebula" given to this class of objects is due to the fact that many of them appear disc-like, similar to how the planets in our Solar System appear when viewed through a telescope. In reality, planetary nebulae are stars at the point of death.

NOAO Outreach Planetary Nebula Sampler A Planetary Nebula Sampler Other NOAO Image pages Image Gallery Planetary Nebula Advanced Observing Program AOP Planetary Nebula Index of Nebula Abell 35 Abell 39 Abell 78 M 22 NGC 650-1 NGC 2346 NGC 2371 NGC 3587 NGC 6441 NGC 6804 NGC 7027 PG 1520+525 Ring Nebula Saturn Nebula A planetary nebula forms when a star can no longer support itself by fusion ...

Fusion - Physics of a Fundamental Energy Source Planetary Nebulae A planetary nebula can result as a star with mass of less than several times the solar mass ( low mass star) ejects mass in the red giant stage, near the end of the star's life. In this stage, the central part of the star, which is about the size of the earth, consists of a carbon ash core, a shell in which helium is fusing to ...

Common Information; The Image Gallery ...

ARVAL Catalog of Bright Planetary Nebulas Common Name Size Mag. Area NGC Type Const. VQ R.A. (E2000) Dec. (E2000) NGC 40 in Cepheus 0.6 11.0 0.3 0040 Planetary nebula disc with central star Cep D 00h 13m 00s 72 32' N NGC 246 in Pisces 3.8 8.0 11.3 0246 Planetary nebula ring Psc C 00h 47m 00s 11 53' S M76, Little Dumbbell in Perseus 4.8 12.0 18.1 0650 Planetary nebula irregular Per C 01h 42m 18s ...

Variability of Planetary Nebula Central Stars For the past decade, we have been searching for short timescale variability in the central stars of Galactic planetary nebulae (PNN). By using CCDs to simultaneously measure the PNN and several comparison stars, and by applying image analysis techniques to suppress or remove the background, we have been able to derive relative magnitudes for the ...

Two New Planetary Nebulae and an AGN in the Galactic Plane ...