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Topics related to "FINDINGS COULD HELP UNDERSTAND WEATHER New observatory sheds light on sun's"

twilight twilight
twilight period between sunset and total darkness or between total darkness and sunrise. Total darkness does not occur immediately when the sun sinks below the horizon because light from the sun that strikes the atmosphere is scattered (both by the air itself and by suspended matter, e.g., dust and... Read more
conjunction conjunction
conjunction in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun. When a body is in conjunction with the sun, it rises with the sun, and thus cannot be seen; its elongation is 0°. The moon... Read more
Sun Ra Sun Ra
Sun Ra Keyboard player, bandleader, composer For the Record… Selected discography Sources The eccentric Sun Ra has exerted a profound influence over modern jazz for more than four decades. As a solo performer and also as leader of the Sun Ra Arkestra, the musician has blazed new trails in... Read more
Orbiting Solar Observatory Orbiting Solar Observatory
Orbiting Solar Observatory (OSO), series of eight orbiting observatories (see observatory, orbiting ) launched between 1962 and 1971 by the National Aeronautics and Space Administration (NASA) to study the sun in the ultraviolet and X-ray wavelengths filtered out by the earth's atmosphere. The... Read more
James Bradley James Bradley
James Bradley 1693-1762, English astronomer. His discovery of the aberration of light, announced in 1728, provided an important line of evidence for the motion of the earth around the sun. In 1742 Bradley became the third Astronomer Royal. Under his direction the observatory at Greenwich was... Read more
navigation navigation
navigation science and technology of finding the position and directing the course of vessels and aircraft. Early Navigational Techniques In ancient times, mariners navigated by the guidance of the sun and stars and landmarks along the coast. The Phoenicians were probably the most daring of the... Read more
skeet skeet
skeet, or skeat, a dipper with a long handle which was used to wet the sides and deck of a wooden ship in very hot weather to prevent the planking splitting or opening up in the heat of the sun. In small sailing vessels the skeet was also used to wet the sails in very light weather so that they... Read more
phase phase
phase in astronomy, the measure of how much of the illuminated surface of a planet or satellite can be seen from a point at a distance from that body; the term is most often used to describe the moon as seen from the earth. When the moon is between the earth and the sun, we cannot see the lighted... Read more
John Nelson John Nelson
Nelson, John John Nelson, a radio engineer specializing in the study of shortwave radio propagation, made discoveries that have had a profound effect upon the study of contemporary astrology. As an employee of the Radio Corporation of America, he had the task of exploring the fluctuations in the... Read more
spectroheliograph spectroheliograph
spectroheliograph device for photographing the surface of the sun in a single wavelength of light, usually one corresponding to a chief element contained in the sun, e.g., hydrogen or calcium; the resulting photograph is called a spectroheliogram. The spectroheliograph was invented in 1890... Read more

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