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4 giorni fa · Messier 13 was discovered by Edmond Halley in 1714, and cataloged by Charles Messier on June 1, 1764. The 1974 Arecibo message, which contained encoded information about the human race, DNA, atomic numbers, Earth's position and other information, was beamed from the Arecibo Observatory radio telescope towards M13 as an experiment in contacting potential extraterrestrial civilizations in the ...
4 giorni fa · Arriving at the University Libraries in 1986 to coincide with the return of Halley’s Comet, the Philip Mills Arnold Comet Collection includes 34 works in 33 volumes concerning the science and theory surrounding comets—the earliest of which dates to 1531 and all but a few printed before 1900. Such material provides a window into early ...
1 giorno fa · Comets then goes on to provide a detailed listing of all the historical appearances of Halley’s Comet. Isaac Asimov gave a short list in one of his articles (‘Change of Time and State’, Fantasy & Science Fiction, April 1982, reprinted in X Stands for Unknown, Doubleday, 1985, Fig. 6), and I duly mined it out, but his main point was to prove the assertion that comets were unlucky, that ...
2 giorni fa · It has been observed since ancient times, but it was not recognized as a periodic solar system object until its orbit was accurately calculated by Edmund Halley in the 18th century. The comet's nucleus is estimated to be about 15 kilometers in diameter and it is composed of ice, dust, and small rocky particles.
3 giorni fa · 1705 – Edmond Halley predicts the return of Halley's comet in 1758, the first use of Newton's laws by someone other than Newton himself. 1728 – Isaac Newton posthumously publishes his cannonball thought experiment. 1742 – Colin Maclaurin studies a self-gravitating uniform liquid drop at equilibrium, the Maclaurin spheroid.
2 giorni fa · It was discovered by English astronomer Edmond Halley in 1714 and later included in Charles Messier’s catalog. Messier 13, NGC 6205, or Great Globular Cluster In Hercules. Credit: Sid Leach/Adam Block/Mount Lemmon SkyCenter.
2 giorni fa · It sits in the constellation Hercules and was discovered way back in 1714 by the astronomer Edmond Halley (yep, the same guy the famous comet is named after). This cluster is massive, containing hundreds of thousands of stars crammed into a space about 145 light-years across.
