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- oscailt Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
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- cró Tagairt Faomhadh an téarma seo mar chuid de Thionscadal Lex
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- Fernrohrdurchmesser
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- Sainmhíniú Hauptspiegeldurchmesser oder Durchmesser der Objektivlinse eines Teleskops Tagairt "in Anlehnung an havard.edu > International Comet Quarterly > Glossary of (comet and) astronomical terms, http://www.icq.eps.harvard.edu/ICQGlossary.html (10.1.2018)"
- Nóta Hinweis: Bestimmt das Auflösungsvermögen eines Teleskopes
- aperture
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- Sainmhíniú diameter of the primary mirror or objective lens of a telescope, determining brightness and sharpness of the captured image Tagairt "COM-EN, based on: - European space agency (www.esa.int) > Our Activities > Space Science > 'aberration' http://www.esa.int/Our_Activities/Space_Science/A [9.6.2017] - Telescopes Plus > Helpful Information > Understanding Telescopes https://www.telescopesplus.com/blogs/helpful-information/18966596-understanding-telescopes [12.6.2017] "