Romer (ole christensen romer, 1644 ~ 1710) Romer's most significant contribution: the first experiment with the astronomy proved the speed of light with limited spread. Romer measure longitude at sea the first to develop the tables were eating a variety of satellite observations. Will eat the whole story of time and place when the form control can be identified from the longitude difference. When he observed on the ground movement of the satellite of Jupiter, we found that when the satellite back into Jupiter (Ganymede food), two successive time interval between the disappearance of a systematic change. On the basis of a large number of observations, September 1676, Romer announced to the Paris Academy of Sciences is expected at 5:25:45 on on November 9 Ganymede eclipse will occur for 10 minutes. Paris Royal Observatory astronomers doubt this very much though, but still made of wood health food observations carefully, fully confirmed the observations correctly predicted by Romer. November 22 Academy He also explained in detail his theory that such changes are due to the light to reach Earth from Jupiter takes time, and that the length of time depends on the Jupiter and the Earth's orbit in their respective position . In fact, he estimates that light across the earth's orbit around the sun in diameter, takes 22 minutes (now know only 16 minutes). And clearly states: "... ... for the 3000 leagues (league, length of the name, about 3 miles or 3 miles) distance (very close to the Earth's diameter), light (the spread) is less than 1 second." Romer's observations of Jupiter food, and food on Ganymede twice the time interval between the change in the theoretical explanation, by the astronomer royal, Casey was in the blame, but by Huygens, Leibniz, Newton, etc. people's support, thus establishing the correct concept of the limited speed of light, and the exact values for the speed of light laid the foundation received. Shortly thereafter, the Huygens data for the first time under the Roemer calculated the speed of light; Brad have mine accepting the theory of Romer, the light-line method of direct measurement of differential speed of light. The speed of light as a physical constant, the significance of it more and more recognized by people. Romer was one of the founders of the meridian ring, he used a sub-degree meridian disk of stars through was observed. Romer romer, alfred sherwood (1894.12.28, Princeton, New York White ~ 1973.11.5, Cambridge, Massachu_set_ts) U.S. paleontologist, to the concept of evolution of vertebrates known. His greatest contribution to biology is the study of vertebrate fossils in the use of comparative anatomy and embryology of the method. Impoverished, relying on scholarships, loans and work, and graduated from Amherst (amherst) College, visited the U.S. in New York City Museum of Natural History's dinosaur fossils after the interest generated. Columbia University in 1919 under the tutelage of Gregory (william k. gregory), his doctoral dissertation became the classic comparative anatomy. He deeply influenced by Gregory, Gregory helped to establish its comparative anatomy, functional anatomy and evolution school, their views still popular. Hou Luomo in Bellevue (bellevue) Hospital School of Medicine, University of Chicago, Harvard and other places to teach. Published in 1933, "Vertebrate Paleontology" (vertebrate paleontology), affected the later decades of the discipline's basic academic thinking. Many books, there are "dragon head review" (review of the pelycosauria, 1940), "vertebrate body structure" (the vertebrate body, 1949; a wide range of comparative anatomy textbooks, as used by U.S. universities), "reptilian osteology" (the osteology of the reptiles, 1956). He fossil fish, amphibians, reptiles, extensive research, examine the functional morphology change and the environment, to illustrate the process of biological evolution. Romer affable, often relaxed and simple expression of a profound knowledge of narrative. Retired in 1965 from Harvard University after retirement is still incredible energy in the travel, fossil collecting, speeches and attend meetings, visit the museum. Romer to a lifetime of vertebrate evolution, ancient biology, comparative anatomy and embryology to obtain evidence.
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Encyclopedia
Luomo Romer Michael astronomer. September 25, 1644 Born in Aarhus, September 19, 1710 and died in Copenhagen. He graduated from the University of Copenhagen. 1672, French astronomer Picard to Denmark to re-determination of the geographical coordinates of the Observatory Tycho, Pickard returned to law, Romer with the Royal Observatory in Paris Pickard, when his assistant. Back to Denmark in 1681, he served as the Royal mathematician and professor of astronomy at the University of Copenhagen, founded and led the University of Copenhagen Observatory. His most important achievement is to prove that a finite speed of propagation of light. His study found that the movement of the satellite of Jupiter, when Jupiter and the Earth farthest apart, cover food Jupiter Jupiter is the time delay than the time calculated in advance; in Jupiter at Opposition, that is, when Jupiter and Earth apart recently, the occurrence of wood Wei moments will eclipse earlier. 1676 Romer, the limited nature of light propagation velocity correctly explain this phenomenon. According to observation, estimation of the diameter of the light through the Earth's orbit for about 22 minutes, the speed of light is 225,000 kilometers per second (measured value of the speed of light, modern 299,792.46 kilometers per second). Lei Hou Bula was found half-century aberration, Romer is the use of research results, giving the Copernican theory of the strong center of the sun proof. Romer also developed into a ring with a precision scale transit instrument and meridian circle, improve the micrometer, to create a number of other astronomical instruments, determined the location of more than a thousand stars. (Maxing Yuan)