The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. It constitutes the visible portions of the Cygnus Loop, a large but relatively faint supernova remnant. The source supernova exploded some 5,000 to 8,000 years ago, and the remnants have since expanded to cover an area roughly 3 degrees in diameter. The distance to the nebula is not precisely known, but recent evidence from the Far Ultraviolet Spectroscopic Explorer (FUSE) supports a distance of about 1,470 light-years.
It was only a year ago — in April, 2010 — that Iceland’s all but unpronounceable Eyjafjallajokull volcano erupted, sending dramatic plumes of smoke into the sky and closing Europe’s air space for five days. Now the Grimsvotn volcano, which lies under a glacier about 120 miles from Rejkjavik, is letting off steam: On April 22, its powerful volcanic eruption sent a ash and smoke 12 miles into the air.
Megamaterials to Propel Human Civilization Into ‘the Fiber Age’ (…)
This “double cluster,” NGC 1850, is located in the Large Magellanic Cloud. It consists of a large cluster of stars, located near a smaller cluster. The large cluster is 50 million years old; the other only 4 million years old. The cluster is surrounded by gas believed to be created by the explosion of massive stars.