Nebula - a massive interstellar cloud of dust, hydrogen, helium and other ionized gases.
Astronomers report seeing supermassive black hole swallowing star: The unprecedented sight was revealed in bursts of radiation from a constellation 4.5 billion light-years away, scientists say in the journal Nature. Image: An artist’s rendering of a burst of radiation released as a supermassive black hole consumes a star. Credit: Amadeo Bachar / Nature (Source: Los Angeles Times)
This image shows a small part of the Veil Nebula, the remains of a supernova, an immense stellar explosion, that happened between 5000 and 8000 years ago. Here we can see the interstellar gas being heated by the incredible shockwave that is still expanding through space at around 170 kilometres per second. Credit: Image made in visible light by Jean-Charlies Cuillandre for the Canada-France-Hawaii Telescope Corporation.
Within the boundaries of the constellation Cygnus is the WR 134 Ring Nebula, recognized by the glow of ionized hydrogen and oxygen gas. This is the final phase of massive star evolution; preceding supernova explosion. The stellar winds and final supernovas will enrich the interstellar material with heavy elements to be incorporated in future generations of stars.
Inside the famous nebula in Orion, IRAC has revealed many young stars and a long filament of star-forming activity containing thousands of young protostars still in the process of formation, NASA says.