Planetary nebula - Wikipedia
A planetary nebula is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives. [4] The term "planetary nebula" is a …
Planetary nebula | Definition, Temperature, Size, & Facts | Britannica
Planetary nebula, any of a class of bright nebulae that are expanding shells of luminous gas expelled by dying stars. They have a relatively round compact appearance rather than the …
Planetary Nebulas - Harvard–Smithsonian Center for Astrophysics
Planetary Nebulas. When a star like our Sun dies, it doesn’t explode into a supernova or collapse into a black hole. Instead, it gently sheds its outer layers, which form a beautiful cloud called a …
Messier 27 (The Dumbbell Nebula) - Science@NASA
Planetary Nebula. An aging star's last hurrah is creating a flurry of glowing knots of gas that appear to be streaking through space in this close-up image of the Dumbbell Nebula, also …
Planetary Nebulae - NASA
NASA’s Chandra, Hubble Tune Into ‘Flame-Throwing’ Guitar Nebula. article 23 hours ago. 4 min read. Discovery Alert: A Rare Glimpse of a Newborn Planet. article 23 hours ago. ... Planetary …
Planetary Nebula - ESA/Hubble
A planetary nebula is a region of cosmic gas and dust formed from the cast-off outer layers of a dying star. Despite their name, planetary nebulae have nothing to do with planets.
Stellar Evolution | The Schools' Observatory
A planetary nebula (Helix Nebula) Low-mass stars turn into planetary nebulae towards the end of their red giant phase. At that point, the star becomes highly unstable and starts to pulsate. …
Decoding Nebulae - Science@NASA
2021年8月23日 · Nebulae are giant clouds of gas and dust in space. They’re commonly associated with two parts of the life cycle of stars: First, they can be nurseries forming new …
What is a Nebula? Nebula: Definition, Location and Variants | Space
2024年6月17日 · A nebula is a giant cloud of gas and dust located in the space between stars. Nebula is Latin for "mist, vapor, fog, smoke, exhalation," but in an astronomical context, it …
Messier 57 (The Ring Nebula) - Science@NASA
M57, or the Ring Nebula, is a planetary nebula, the glowing remains of a sun-like star. The tiny white dot in the center of the nebula is the star’s hot core, called a white dwarf.