| Instead of illuminating the end of the bar, however, the laser in fact was reflected from a worn spot on a black-anodized metal cap placed over the end of the bar to isolate its center visible through a hole in the cap | Galileo Galilei, Sidereus Nuncius Venice, Italy : Thomas Baglioni, 1610 , |
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| "Solar Ultraviolet Spectrum to 88 Kilometers" | Brumfiel, Geoff September 19, 2008 |
| , The Sidereal Messenger London, England: Rivingtons, 1880 , | Demographics and Host Galaxies of Starbursts |
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| "Einstein's Telescope - video 02:32 " | They believed the other two null correctors were less accurate than the reflective null corrector and so could not verify its reliability |
"The central galaxy in Abell 2029 — An old supergiant".