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Huygens (/ ˈ h ɔɪ ɡ ən z / HOY-gənz) was an atmospheric entry robotic space probe that landed successfully on Saturn's moon Titan in 2005. Built and operated by the European Space Agency (ESA), launched by NASA, it was part of the Cassini–Huygens mission and became the first spacecraft to land on Titan and the farthest landing from Earth a spacecraft has ever made. [3]
The Table Mountain site used a Nd:YAG laser operating at a frequency-doubled wavelength of 532 nm, with a repetition rate of 15 to 30 Hertz and a pulse power full width at half maximum (FWHM) in the tens of megawatts range, which was coupled to a 0.6 m (2.0 ft) Cassegrain reflector telescope for transmission to Galileo. The Starfire range site ...
A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.
The Sun is a Population I, or heavy-element-rich, [b] star. [30] Its formation approximately 4.6 billion years ago may have been triggered by shockwaves from one or more nearby supernovae . [ 31 ] [ 32 ] This is suggested by a high abundance of heavy elements in the Solar System, such as gold and uranium , relative to the abundances of these ...
Ultraviolet C or (UVC) range, which spans a range of 100 to 280 nm. The term ultraviolet refers to the fact that the radiation is at higher frequency than violet light (and, hence, also invisible to the human eye). Due to absorption by the atmosphere very little reaches Earth's surface.
planet Saturn: seen from Earth maximum brightness near opposition and perihelion when the rings are angled toward Earth [42] −0.30: Halley's comet: seen from Earth Expected apparent magnitude at 2061 passage −0.27: star system Alpha Centauri AB: seen from Earth Combined magnitude (3rd brightest star in night sky) −0.04: star Arcturus ...
Acorn followed up by offering a new product, replacing Desktop C, that integrated CFront 3.0 to support C and C++ compilation, albeit without support for exceptions. [255] Feedback from developers had been negative, however, citing poor-quality code and slow compilation times, with developers apparently wanting "a true native C++ compiler with ...