Think Science .

What is the usage of CCD(CHARGE COUPLED device) in Astronomy?

For cameras and spectrometer detectors. They are exquisitely sensitive and can be manufactured for selectivity of sensitivity to either broad or very narrow bands of the EM spectrum.

Here’s how CCDs are used on the Kepler telescope.
http://kepler.nasa.gov/sci/design/spacecraft.html

From A-z astronomy page :

Digital electronic imaging devices, like the CCD (charge coupled device) allow the amateur astronomer to “see” the wonders of our universe as never before. The CCD affords amazing views of the night sky even for amateur astronomers with modest telescopes living in large light-polluted metropolitan areas.

For more information on CCD in astronomy, google the term.

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