Periodically the planet Venus passes directly between Earth and the Sun, appearing as a small black dot on the Sun's disk. Since astronomers first became aware of them in 1631, these "transits of Venus" have fascinated...

In the past several years, news outlets have come alive with more and more information about the past and present of Mars. The source of much of that fascinating data has been the ChemCam instrument, a suite of remote...

This site, hosted by the National Aeronautics and Space Administration Jet Propulsion Laboratories, is the press release from the Mars Exploration Rover Mission on July 12, 2004. It contains new images from the...

This educator's guide was developed with the Cosmic Questions national traveling exhibit. It contains activities relating to the exhibit's theme, our place in space and time-and information about the exhibit. Although...

This PDF document consists of lesson plans and an activity which is composed of a three-part questionnaire that launches students on discussions about where objects in space are located, and when they were formed- an...