Telescopes are specialist optical instruments that have been around for over 400 years and are useful for many applications including seafaring, military operations and especially stargazing. But not ...

Telescopes gather and focus light using precisely-shaped mirrors and lenses (or a combination of both). The larger the telescope’s main mirror or lens, the more light is gathered and the more detail ...

China plans to build a general-purpose optical telescope with the greatest aperture in Asia as soon as possible between 2024 and 2030 to compete with other nations' optical astronomical telescopes.