The most commonly-used and convenient arrangement for CCD imaging was the piggy-back telescope mode. In this configuration, observers were still free to use the main telescope for visual eyepiece ...

The teams behind two potential new space telescopes have embarked on their final design studies as they go head-to-head to see which will be the first of NASA’s new "Probe" class of mission.

CCDs have little dark current (ambient current detectable even when a pixel isn't firing) and low noise, and long exposures also let CCD telescopes image very faint sources. CMOS sensors ...