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How does the HST Capture an Image and then Send it to Earth?
wide field planetary camera

#2: Turning the Light into an Electronic Signal

Once the light from a distant object is gathered and focused by Hubble's mirrors, it is sent to one of its several scientific instruments, like the Wide Field/Planetary Camera.

Inside this instrument, are whole systems of filters and mirrors that eventually feed the light to an electronic sensor, called a CCD.

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