Detailing several famous comets with pictures and descriptions. ... While the nuclei of most comets are about 1.6 to 3.2 km (1 to 2 miles) across, Hale-Bopp's was estimated to be 40 km (25 miles) across.

This practice of referring only to multiple-apparition comets by the discoverers' names, and to single-apparition comets by the designation, continued until the second world war (1940s).

Also available is an alphabetical list of minor-planet names and statistics on the individual discoverers and most prolific discovery sites.

Cometary Names ... Comets are generally named for their discoverers, with certain guidelines about what constitutes a discovery and how many discoverers may be named. ... List for 2000.

A listing of phobia terms and their meaning. ... My interest is in the names only.; All the phobia names on this list have been found in some reference book. ... Cometophobia- Fear of comets.

My interest is in the names only.; All the phobia names on this list have been found in some reference book. ... Comets- Cometophobia. Computers or working on computers- Cyberphobia.

The original purpose of this list was to provide a database of unique names and designations for periodic comets that will simplify searches in the PDS system.

List of the best sites on the web ... Examining objects and phenomena in space such as nebulae, galaxies and comets is Astronomy. Some people do it for a living, others just to pass the time.

Microchip Names (K) ... Note: As a public outreach effort, over 1 million names were collected and placed on the STARDUST spacecraft,which will visit Comet Wild 2 in 2004. See here for more details.

Microchip Names (L) ... Note: As a public outreach effort, over 1 million names were collected and placed on the STARDUST spacecraft,which will visit Comet Wild 2 in 2004. See here for more details.