🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsРусскийالعربيةفارسیไทย한국어中文日本語EntityQ1054449· pop 28· linked from 39 articlesactive opticsshaping technology for reflecting telescopesAvailable in 27 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةAzerbaijaniCatalanConnectionstechnologyEntitymirrorEntityCategoriesAstronomical imagingTelescopes