Search results
Results from the WOW.Com Content Network
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.
Notable test flights of spaceflight systems may be listed even if they were not planned to reach space. Some lists are further divided into orbital launches (sending a payload into orbit, whether successful or not) and suborbital flights (e.g. ballistic missiles, sounding rockets, experimental spacecraft).
Date Event leading to space exploration Country Researcher(s) Ref(s). 1610 First telescopic observation of the night sky: discovery of the Galilean moons, lunar craters and the phases of Venus. Venice: Galileo Galilei: 1668 First reflecting telescope. England: Isaac Newton: 1781 First telescopic discovery of planet . Great Britain: William ...
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 ...
The Minor Planet Center noted that Earth's atmosphere was impacted above Brantford 70 km from Grimsby. [2] The resulting sonic boom was mostly heard in Hamilton while the fireball was visible to observers in the Greater Toronto Area and as far as the U.S. states of Maryland , Ohio , Pennsylvania , and New York .
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.
2013: Discovery of ultra-long class of gamma-ray bursts; 24 April 2013: Swift detected an X-ray flare from the Galactic Center. This proved not to be related to Sgr A* but to a previously unsuspected magnetar. Later observations by the NuSTAR and the Chandra X-ray Observatory confirmed the detection. [42]
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]