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20 hours ago · For more information, see the Saturn V article. The Saturn V launch record is usually quoted as having never failed, e.g. "The rocket was masterminded by Wernher Von Braun and did not fail in any of its flights", Alan Lawrie and Robert Godwin; Saturn, but the Apollo 6 launch should be considered a partial mission failure.
20 hours ago · A Chandra X-Ray Observatory image of Cygnus X-1, which was the first strong black hole candidate discovered. X-ray binaries are binary star systems that emit a majority of their radiation in the X-ray part of the spectrum. These X-ray emissions are generally thought to result when one of the stars (compact object) accretes matter from another ...
20 hours ago · where r is the quantum position operator, p is the quantum momentum operator, × is cross product, and L is the orbital angular momentum operator. L (just like p and r) is a vector operator (a vector whose components are operators), i.e. = (,,) where L x, L y, L z are three different quantum-mechanical operators.
20 hours ago · Etymology The English word sun developed from Old English sunne. Cognates appear in other Germanic languages, including West Frisian sinne, Dutch zon, Low German Sünn, Standard German Sonne, Bavarian Sunna, Old Norse sunna, and Gothic sunnō. All these words stem from Proto-Germanic * sunnōn. This is ultimately related to the word for sun in other branches of the Indo-European language ...
20 hours ago · t. e. In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light ). The opposite change, a decrease in wavelength and increase in frequency and energy, is known as a blueshift, or negative redshift. The terms derive from the colours red and ...
20 hours ago · A replica of Luna 9, the first spacecraft to land on the Moon The first image taken of the far side of the Moon, returned by Luna 3 As part of human exploration of the Moon, numerous space missions have been undertaken to study Earth's natural satellite. Of the Moon landings, Luna 2 of the Soviet Union was the first spacecraft to reach its surface successfully, intentionally impacting the Moon ...
20 hours ago · Brooklyn, New York City, U.S. "for his contributions to the theory of economic growth". 1986. James M. Buchanan. Murfreesboro, Tennessee, U.S. "for his development of the contractual and constitutional bases for the theory of economic and political decision-making". 1985. Franco Modigliani. Rome, Kingdom of Italy.
