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2. Samuel Oschin telescope - Wikipedia

   en.wikipedia.org/wiki/Samuel_Oschin_Telescope

   The Samuel Oschin telescope (/ ˈɔːʃɪn /), also called the Oschin Schmidt, is a 48-inch-aperture (1.22 m) Schmidt camera at the Palomar Observatory in northern San Diego County, California. It consists of a 49.75 inches (1.264 m) Schmidt corrector plate and a 72 inches (1.8 m) (f/2.5) mirror. The instrument is strictly a camera; there is no ...

3. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...

4. Oph-IRS 48 - Wikipedia

   en.wikipedia.org/wiki/Oph-IRS_48

   Oph-IRS 48 is a star surrounded by an extraordinary protoplanetary disk, about 444 light-years from Earth in the constellation of Ophiuchus. [3] The disk has revolutionized the view of planet formation in astronomy. Studies have shown that the millimeter dust particles are gathered in a crescent shape, while the gas (traced by CO molecules) and ...

5. Quartzite - Wikipedia

   en.wikipedia.org/wiki/Quartzite

   Quartzite. Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone. [1][2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and ...

6. Mirror - Wikipedia

   en.wikipedia.org/wiki/Mirror

   A mirror reflecting the image of a vase A first-surface mirror coated with aluminium and enhanced with dielectric coatings. The angle of the incident light (represented by both the light in the mirror and the shadow behind it) exactly matches the angle of reflection (the reflected light shining on the table). 4.5-metre (15 ft)-tall acoustic mirror near Kilnsea Grange, East Yorkshire, UK, from ...

7. Sarah Adam becomes first woman to play on U.S. wheelchair ...

   www.aol.com/sarah-adam-becomes-first-woman...

   PARIS — The U.S. and Canada wheelchair rugby teams were battling it out on the court as an announcement broke through with 5:53 remaining in the first quarter.