This week, Space Shuttle mission STS-93 deployed the Chandra X-Ray Observatory, the world's most powerful X-Ray telescope. The third of NASA's "Great Observatories," the Chandra X-Ray Observatory will study X-Rays rather than visible light (the Hubble Space Telescope) or gamma rays (the Compton Gamma Ray Observatory). This site offers overviews and news of the Observatory and its mission. Operated...

NASA's Chandra X-Ray Observatory, designed to observe X-rays from high energy regions of the universe, regularly releases images taken using the Advanced CCD Imaging Spectrometer (ACIS). This image shows a pulsar located exactly at the geometric center of the supernova remnant known as G11.2-0.3. The image is accompanied by a table giving the scale, category, coordinates, observation date and...

NASA's Chandra X-Ray Observatory, designed to observe X-rays from high energy regions of the universe, regularly releases images taken using the Advanced CCD Imaging Spectrometer (ACIS). This image reveals a bright central star surrounded by a cloud of multimillion-degree gas in the Cat's Eye nebula. The image is accompanied by a table giving the scale, category, coordinates, observation date and...

NASA's Chandra X-Ray Observatory, designed to observe X-rays from high energy regions of the universe, regularly releases images taken using the Advanced CCD Imaging Spectrometer (ACIS). This image is animated to show the twinkling of the Orion Nebula, one of the closest star-forming regions to Earth (AVI). The image is accompanied by a table giving the scale, category, coordinates, observation...

This NASA site was developed by Maggie Masetti to demonstrate astronomical distances and help users grasp the size our universe. Starting at Earth, users simply select the Zoom Out link to see continuously larger areas of our universe until they reach The Farthest Visible Reaches of Space. At each stop, visitors can click on the Tell Me About ___! link to receive information about the particular...

"This site is a tool for amateur astronomers who love to pursue deep sky objects. It employs a web-based version of the Saguaro Astronomy Club's database (ver 7.2), consisting of over 10,000 records. This online version of the SAC database allows amateur astronomers to compile detailed and customized observing lists," says the text on the Deep Sky Database homepage maintained by members of the...

At this Web site, the Hawaiian Astronomical Society provides users with educational information for over seventy constellations. First, visitors can read the amusing myths associated with each constellation. Following, students will find interactive, wide view and binocular width maps depicting the locations of the constellations, stars and deep sky objects. Everyone can enjoy the many remarkable...

This site displays the first-ever images of a large, double asteroid once assumed to be a single asteroid called Antiope. The images were recently released by the Southwest Research Institute (SWRI). Each asteroid in the pair is approximately 50 miles across, separated by about 100 miles. This discovery was made using the W.M. Keck Observatory, Mauna Kea, Hawaii. Images of another discovery, that...

This Topic in Depth presents the science and research of galaxies. First, the University of Cambridge offers clear, logical descriptions and images of the Milky Way, spiral and elliptical galaxies, clusters, and dark matter of the Universe (1). Users can also find educational tutorials on many other cosmology topics. Next, the Space Telescope Science Institute's "Galaxies Galore, Games and More is...

A NASA mission expected to launch in 2006, the Gamma Ray Large Area Space Telescope (GLAST) is being developed to observe celestial gamma-ray sources in the 10MeV to over 100GeV energy band. After discovering its four key objectives, visitors can learn about GLAST's Precision Tracker Calorimeter, Data Acquisition System, and Anticoincidence Detector. Students and educators will find documentation...