Absoluteastronomy.com is an online information portal that provides reference information and interactive features for a variety of topics. This site was launched in 1999 and is based in Seattle, Washington.

The homepage features links to information about historical events, interesting natural phenomena, and topics relevant to the current news headlines. The homepage also contains a list of featured topics, featured discussions, ‘Top Ten’ lists, and a list of popular pages this week

Clicking on a topic displays a page with detailed information and photos about the topic, as well as a list of current discussion about the topic, quotes related to the topic, and definitions of words contained within the topic description. Visitors can email, print, and bookmark the topic, and they can click ‘Link’ to receive a link address for placing a link to the topic on other sites.

The ‘Discussions’ section features the latest forum discussions, along with a list of the most active discussions. Registration is required in order to post messages in the forums.

The ‘Topics’ section provides an alphabetical index of every topic covered on the site. The ‘Dictionary’ features a search bar, a ‘Word of the Day,’ and a list of the most popular pages this week. The ‘Almanac’ section provides a list of featured timelines, a ‘Today in History’ event list, a ‘Factoids’ section containing random facts in a variety of categories, and a ‘Top Ten Lists’ section featuring several top ten lists in a variety of categories.