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Photograph and information on this plant which is often used in aquariums.

The Astronomical Applications Departmentof the U.S. Naval Observatory computes, from fundamental astronomicalreference data, the position, brightness, and other ...

Sound theme for Windows. Requirements, installation directions, and sample files.

Operates on behalf of the astronomers at all ten UC campuses and is comprised of extensive technical facilities, a business office, telescope and support facilities ...

HowStuffWorks explains thousands of topics, from engines to lock-picking to ESP, with video and illustrations so you can learn how everything works.

Calculate the sunset and sunrise for any major world city. Contains an interactive chart, visualizing the sunset and sunrise for the entire year.

Home of the Royal Swedish Academy of Science's 1-m solar telescope. High-resolution images available.

An extensive and graphics intensive astronomical learning system. Learn all about the Earth and Space Sciences.A NASA sponsored site.