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Extragalactic astronomy

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View Resource Magnificent Details in a Dusty Spiral Galaxy

The spiral galaxy NGC 4414 was first imaged by the Hubble Space Telescope over the course of two months in 1995. However, due to its large size, only half of the galaxy was visible in the datasets collected. This year the Hubble team returned to NGC 4414 and completed the portrait. The results, recently released online, are some beautiful images of a dusty spiral galaxy containing older yellow and...
View Resource Next Generation Space Telescope (NGST) Observatory Architecture and Performance

Although not scheduled to be launched until 2011, design plans for the Hubble Space Telescope's replacement are already underway. This research paper describes some of the architectural and performance specifications slated for the Next Generation Space Telescope (now called the James Webb Space Telescope). The seven-meter primary mirror will be hexagonal and made up of twelve smaller one-meter...