Astronomers utilize photodetectors, primarily charge-coupled devices (CCDs), in NASA's Hubble Space Telescope to capture high-resolution images of galaxies. The HST's instruments include various types of photodetectors, such as CCDs and a CMOS chip used in the Near Infrared Camera and Multi-Object Spectrometer (NICMOS). An earlier instrument, the Faint Object Camera (FOC), employed an intensified TV tube before being replaced. These photodetectors convert incoming light into electronic signals, enabling detailed analysis of celestial objects. Understanding the functionality of these devices is crucial for grasping how Hubble produces its stunning galactic images.
