Is there a telescope in Cardiff?

Yes, there is a telescope in Cardiff. It is located at the Cardiff University School of Physics and Astronomy and is called the "John Couch Adams Telescope". It is a 24-inch (61 cm) Cassegrain reflecting telescope housed in a roll-off roof observatory on the roof of the school building. The telescope is named after John Couch Adams, a British mathematician and astronomer who predicted the existence of the planet Neptune in 1846. The telescope is used for research and teaching purposes by the school's astronomy department.