| 11. | Those tests were partly carried out on the Infrared Optical Telescope Array Observatory.
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| 12. | For the photometric observations of asteroids, the department uses 65 cm optical telescope.
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| 13. | Infrared Optical Telescope Array observations suggest another companion at 18.6 mas.
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| 14. | The one meter Dall-Kirkham reflector ( ) is the largest optical telescope in Finland.
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| 15. | For further information on simple optical telescopes, see Refracting telescope ?Refracting telescope designs.
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| 16. | The satellite was designed to identify missile launches using optical telescopes and infrared sensors.
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| 17. | Currently, a 130-cm optical telescope is working at the site.
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| 18. | The satellite is designed to identify missile launches using optical telescopes and infrared sensors.
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| 19. | Technology has enhanced the abilities of fixed optical telescopes, as well as radio telescopes.
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| 20. | "You'll be able to do it all through optical telescopes.
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