Eskimo Nebula NGC 2392. (Credit: Andrew Fruchter (STScI) et al., WFPC2, HST, NASA) It was discovered by William Herschel in 1787. We now know that it's a planetary nebula, one that firns when a sun-like star, at the end of its life, loses its outer layers. It's about 1/3 of a light year across and located 3000 light years away in the constellation Gemini. Mona Evans, “Nebulae” http://www.bellaonline.com/articles/art43407.asp
Horsehead Nebula. (La Nebulosa Testa di Cavallo, nota anche come Barnard 33, B33 , è una nebulosa oscura nella costellazione di Orione. La Nebulosa è una regione di gas più densa del mezzo circostante in via di disgregazione a causa dell'intensa radiazione ultravioletta di stelle come σ Orionis. Secondo uno dei modelli ipotizzati sarebbe in uno stadio iniziale del processo che porterà alla formazione di un globulo di Bok.)
This photo from NASA's Hubble Space Telescope shows an ominous pillar of gas and dust known as the Cone Nebula. The image shows the top portion of the nebula that is 2.5 light years in height. The Cone Nebula is 2,500 light-years from Earth in the Monoceros constellation. The red halo of light seen around the pillar is caused when ultraviolet radiation causes hydrogen gas in the nebula to glow.
Astronomy Picture of the Day for 13 Jul 2014. NGC 2818 is a beautiful planetary nebula, the gaseous shroud of a dying sun-like star. It could well offer a glimpse of the future that awaits our own Sun after spending another 5 billion years or so steadily using up hydrogen at its core, and then finally helium, as fuel for nuclear fusion.
Planetary nebulae can look simple, round, and planet-like in small telescopes. But images from the orbiting Hubble Space Telescope have become well known for showing these fluorescent gas shrouds of dying Sun-like stars to possess a staggering variety of detailed symmetries and shapes.
This image of a pair of interacting galaxies called Arp 273 was released to celebrate the 21st anniversary of the launch of the NASA/ESA Hubble Space Telescope. The distorted shape of the larger of the two galaxies shows signs of tidal interactions with the smaller of the two. It is thought that the smaller galaxy has actually passed through the larger one
Barred Spiral Galaxy NGC 1300 (Mar 25 2012) Image Credit: Hubble Heritage Team, ESA, NASA Big, beautiful, barred spiral galaxy NGC 1300 lies some 70 million light-years away on the banks of the constellation Eridanus. This Hubble Space Telescope composite view of the gorgeous island universe is one of the largest Hubble images ever made of a complete galaxy. NGC 1300 spans over 100,000 light-years and the Hubble image reveals striking details of the galaxy's dominant central bar(...)…
Deep space image taken by the Hubble space telescope. Each speck of light is another galaxy, containing billions of stars. Hubble is now expected to function until at least 2014, when its scientific successor, the James Webb Space Telescope (JWST), is due to be launched.
The Cat's Eye Nebula (NGC 6543) in normal light. It is a planetary nebula just 3,000 light-years away in the northern constellation Draco. The term 'planetary nebula' is misleading - such objects are the result of sun-sized (i.e., our sun, Sol) stars shedding huge volumes of material late in their stellar lives, rather than become black holes.