A supernova explosion enriches the surrounding interstellar medium with heavy elements. The outer rings are caused by previous ejecta, long before the final explosion. Image credit: ESO / L. Calçada, of the remnant of SN 1987a
Tune your radio: Galaxies sing when forming stars - DeepStuff.org
If you could travel at 99.9% the speed of light, how long would it take you to get to the Moon? Mars? The nearest star? Hop aboard our interstellar starship and find out! http://futurism.com/images/traveling-near-the-speed-of-light-infographic/?utm_campaign=coschedule&utm_source=pinterest&utm_medium=Futurism&utm_content=Traveling%20Near%20The%20Speed%20Of%20Light%20%5BInfographic%5D
Monday, Dec. 8, 2014: Stars form in textbook fashion inside emission nebula NGC 2174, where molecular clouds condense into star formation regions. New stars next slowly blow unused material back into the interstellar medium. After the lengthy process has almost concluded, the stars have broken out into the open.
Do We Live Inside a Bubble in the Interstellar Medium? NASA Astronomers Say "Yes" - http://www.scoop.it/t/science-news/p/1716152767/do-we-live-inside-a-bubble-in-the-interstellar-medium-nasa-astronomers-say-yes
Experiment examining a SLICE of the interstellar medium: (Phys.org)—When you look up at the stars at night, the space between stars looks empty. But, yes there is something there. It's called the interstellar medium. An experiment from the University of Colorado will fly on a NASA suborbital sounding rocket from the White Sands Missile Range in New Mexico on December 15 to study this space between the stars.
The Physics of the interstellar medium / J.E. Dyson, D.A. Williams #novetatsfiq
The Triangulum Emission Nebula - NGC 604Located 2.7 million light-years away in the constellation Triangulum lies the massive nebula known as NGC 604. Though such nebulae are common in galaxies, this one is particularly large, nearly 1,500 light-years across, and it dominates a portion of galaxy M33’s spiral arm. Nebula NGC 604 is also an area of intense star formation. At the heart of the nebula there are over 200 hot stars, most are more massive than our Sun with the largest being up...