Telescope maintenance involves the regular upkeep, repair, and calibration of astronomical telescopes to ensure their optimal performance and accuracy in capturing images of celestial objects. This includes tasks such as cleaning lenses and mirrors, checking and adjusting the telescope's alignment, replacing worn-out parts, and conducting periodic inspections to identify any potential issues that may affect the telescope's functionality. Proper maintenance is essential for preserving the quality of observations and extending the lifespan of telescopes.