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NEW! Gravity’s Fatal Attraction Black Holes in the Universe 2nd Edition! MITCHELL C. 99 Disc. 59: Pb: 978-0-521-71793-9: 312 pp. 00 Disc. 40: Hb: 978-0-521-89554-5: 370 pp. The Cambridge Double Star Atlas JAMES MULLANEY ILLUSTRATED BY WIL TIRION NASA / GSFC / ARIZONA STATE UNIV. 00 Disc. 00: Pb: 978-0-521-49343-7: 154 pp. Left: LRO’s wide-angle camera recorded this image of the craters Gauss (upper right) and Hahn (lower left) shortly after it entered lunar orbit. Above: LRO’s narrow-angle camera captured the Apollo 11 Eagle descent stage (top) and a scientific experiment package (bottom) after the craft descended into its 30-mile (50-km) mapping orbit.

We stock TeleVue apo refractors and all TeleVue eyepieces and we price them to save you money. com and see for yourself. 8” and 10” Astro -Tech Ritchey-Chrétiens . . Sky & Tel Hot Products for 2010. The 8” f/8 $1395 Astro-Tech AT8RC astrograph has premium features the competition doesn’t offer, like quartz mirrors and a carbon fiber body to minimize focus changes; 99% reflectivity dielectric mirror coatings; and more. The Astro-Tech AT8RC was the first sensibly-priced 8” R-C in the U. S. and it’s still the best.

Many CCD cameras based on Kodak’s KAF-8300 chip have external filter wheels that would block more of the telescope’s aperture in the HyperStar configuration. With HyperStar’s f/2 light cone, there was slight vignetting in the corners of the QSI frame when I used the camera’s standard filter wheel made for conventional 1¼-inch filters. But I also tested QSI’s new filter wheel that has slightly larger filters and doesn’t vignette the KAF-8300 chip at f/2. There are no hidden pitfalls to setting up the HyperStar system, and shooting images is equally straightforward.

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Sky & Telescope February 2010 by Sky & Telescope

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