- Messier 87 (Wikipedia)
Messier 87 (also known as Virgo A or NGC 4486, generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo that contains several trillion stars. One of the largest and most massive galaxies in the local universe, it has a large population of globular clusters—about 15,000 compared with the 150–200 orbiting the Milky Way—and a jet of energetic plasma that originates at the core and extends at least 1,500 parsecs (4,900 light-years), traveling at a relativistic speed. It is one of the brightest radio sources in the sky and a popular target for both amateur and professional astronomers.
- Raven, volume 9-10 (2002–2003) (nava.org)
Raven 9/10, covering 2002 and 2003, appears as a special double issue, American City Flags. This milestone vexillological work contains 150 articles dedicated to descriptions and histories of municipal flags of the United States. The cities represented include the largest 100 cities in the country, at least two cities per state, and all state capitals.