- The Trifid Nebula (catalogued as Messier 20 or M20 and as NGC 6514) is an H II region in the north-west of Sagittarius in a star-forming region in the Milky Way’s Scutum–Centaurus Arm. It was discovered by Charles Messier on June 5, 1764. Its name means ’three-lobe’. The object is an unusual combination of an open cluster of stars, an emission nebula (the relatively dense, reddish-pink portion), a reflection nebula (the mainly NNE blue portion), and a dark nebula (the apparent ‘gaps’ in the former that cause the trifurcated appearance, also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers.
- What came after 486? (dfarq.homeip.net)
CPUs didn’t have brand names, besides the manufacturer, until the 1990s. They had part numbers and clock speeds. Frequently we shortened the part numbers. The 486’s full part number was 80486. The courts wouldn’t let Intel trademark a number, so the 486 was the last CPU of its kind, raising the question: What came after 486?