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Moissanite (/ ˈmɔɪsəˌnaɪt /) [ 5 ] is naturally occurring silicon carbide and its various crystalline polymorphs. It has the chemical formula SiC and is a rare mineral, discovered by the French chemist Henri Moissan in 1893. Silicon carbide or moissanite is useful for commercial and industrial applications due to its hardness, optical ...
As a gemstone used in jewelry, silicon carbide is called "synthetic moissanite" or just "moissanite" after the mineral name. Moissanite is similar to diamond in several important respects: it is transparent and hard (9–9.5 on the Mohs scale, compared to 10 for diamond), with a refractive index between 2.65 and 2.69 (compared to 2.42 for diamond).
Header of the Discovery Program website (January 2016) [1] Depictions of the Lucy and Psyche missions Asteroid Eros regolith, as viewed by Discovery's NEAR Shoemaker mission The Discovery Program is a series of Solar System exploration missions funded by the U.S. National Aeronautics and Space Administration (NASA) through its Planetary Missions Program Office.
NASA delivers the most visible elements of the U.S. space program. From crewed space exploration and the Apollo 11 landing on the Moon, to the Space Shuttle, International Space Station, Voyager, the Mars rovers, numerous space telescopes, and the Artemis program, NASA delivers on the civil space exploration mandate.
STS-108 →. STS-105 was the 30th mission of Space Shuttle Discovery, in which Discovery went to the International Space Station. It launched from Kennedy Space Center, Florida, on 10 August 2001. This mission was Discovery 's final mission until STS-114, because Discovery was grounded for a refit, and then all Shuttles were grounded in the ...
Area. 500 square metres (5,400 sq ft) Max. elevation. −750 metres (−2,460 ft) Min. elevation. −900 metres (−3,000 ft) The Lost City Hydrothermal Field, often referred to simply as Lost City, is an area of marine alkaline hydrothermal vents located on the Atlantis Massif at the intersection between the Mid-Atlantic Ridge and the Atlantis ...
STS-56 mission patch. Standing: Cockrell, Foale, Ochoa. Seated: Oswald, Cameron. Space Shuttle program. ← STS-54 (53) STS-55 (55) →. STS-56 was a NASA Space Shuttle Discovery mission to perform special experiments. It was Discovery's 16th flight. The mission was launched from Kennedy Space Center, Florida, on April 8, 1993.
The riserless research vessel JOIDES Resolution (Joint Oceanographic Institutions for Deep Earth Sampling), often referred to as the JR, is one of the scientific drilling ships used by the International Ocean Discovery Program (IODP), an international, multi-drilling platform research program. JOIDES Resolution was previously the main research ...