A group of stars that forms a picture is commonly called a constellation. Astronomers, however, call these star pictures asterisms, and have a slightly different definition of a constellation.
Meteor showers are cyclical, predictable events because they are formed from the icy rock debris shed by comets as they pass the Sun.
On Tuesday, June 8, 2004, many of us will get to see an astronomical performance not seen in 122 years. Venus will pass between the Earth and the Sun, visible as a small black dot moving across the face of the Sun. Called a "transit" by astronomers, this
Because NASA has contributed so many gigabytes of material to the WWW, space travel is one of the best covered subjects on the Web. Photos, video and audio are a terrific way to bring the space program home. For would-be space travelers (and their parents
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