Solar System
- 261
- British Astronomical Association Comet Section
- News, recent observations, observing information and advice.
- 262
- CARA Project
- Comet data archive for amateur astronomers. Includes observation logs and discussions. In English and Italian.
- 263
- Comet Information and the International Comet Quarterly
- From the Smithsonian Astrophysical Observatory. News, observations, orbital data, comet names and designations, links.
- 268
- Lists and Plots: Comets
- Offers updated orbital data, lists and orbit diagrams. Includes near Earth objects and minor planets.
- 271
- Views of the Solar System: Comets
- Basic features, data, discoveries, images and sections with specific information on selected comets.
- 272
- Wikipedia: Comet
- Encyclopedia entry covers physical characteristics, history. List of well-known comets.
- 273
- Windows to the Universe: Comets
- General information and data, pictures, details on the most interesting ones.
- 274
- Astronomy 161: Meteors and Meteor Showers
- Descriptions and explanations of what causes meteors, as well as the history of its study.
- 275
- Cloudbait Observatory - Fireballs
- Fireball and meteor descriptions, reporting information, data on fireballs over Colorado.
- 276
- Jupiter Scientific: Leonids Meteor Shower
- What to expect, how to observe and history of the shower.
- 277
- Jupiter Scientific: The Perseid Meteors
- Information, observation and history. Updated yearly in July.