An astronomical telescope designed to collect and record light from cosmic sources WordNet 3.0 & Open English WordNet

An optical telescope is a telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors. Wikipedia

Telescope which is used to focus light from the visible part of the electromagnetic spectrum Wikidata

An instrument, used both for recreational and scientific purposes, which provides a magnified view of distant objects by collecting and focusing light by means of mirrors and/or optical lenses. Wiktionary

Instrument which provides a magnified view of distant objects. Wiktionary (translation)