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Rubidium is a chemical element; it has symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium. [9] Rubidium is the first alkali metal in the group to have a density higher than water.
Prepared and isolated from urine, it was the first element whose discovery date and discoverer are recorded. [53] Its name first appears in print in the work of Georg Kaspar Kirchmayer in 1676. Recognised as an element by Lavoisier. [1] 1 Hydrogen: 1671 R. Boyle: 1671 R. Boyle Robert Boyle produced it by reacting iron filings with dilute acid.
(471325) 2011 KT 19, nicknamed Niku (/ n iː k uː /), is a trans-Neptunian object whose orbit is tilted 110° with respect to the planets' orbital plane.Thus, it has a nearly polar retrograde orbit around the Sun.
But 1892 was the last year that Pennsylvania wells provided a majority of the oil produced in the US, and in 1895, Ohio surpassed Pennsylvania as an oil producer. By 1907, the decline of the Pennsylvania fields and the great discoveries made in Texas, California, and Oklahoma, left Pennsylvania with less than 10% of the nation's oil production ...
Space Shuttle Discovery [4] Kennedy LC-39B United Space Alliance STS-56: NASA Low Earth Solar astronomy: 17 April 11:37:19: Successful Spacelab Pallet: ESA/NASA Low Earth (Discovery) Spacelab ATLAS-2: SPARTAN-201: NASA Low Earth (Discovery) Solar Crewed orbital flight with five astronauts; SPARTAN deployed from Discovery on 11 April and ...
Experimental Mine, U.S. Bureau of Mines is a landmark located in the Pittsburgh suburb of Bruceton, Pennsylvania.In 1910, the newly created U.S. Bureau of Mines leased a 38-acre tract of land from the Pittsburgh Coal Company and opened the Experimental Mine.
This is a timeline of Solar System exploration ordering events in the exploration of the Solar System by date of spacecraft launch. It includes: It includes: All spacecraft that have left Earth orbit for the purposes of Solar System exploration (or were launched with that intention but failed), including lunar probes .
STS-109 (SM3B) was a Space Shuttle mission that launched from the Kennedy Space Center on 1 March 2002. It was the 108th mission of the Space Shuttle program, [1] the 27th flight of the orbiter Columbia [1] and the fourth servicing of the Hubble Space Telescope. [2]