Showy comet lives up to its billing.Halley's comet captured the public's imagination but proved disappointing as a spectacle. Hyakutake's limited engagement left scientists hungering for more. Hale-Bopp, however, has satisfied both audiences. "This is the first time we've had a comet with a lot of notice that really did live up to expectations, "says Brian G. Marsden Brian G. Marsden (born August 5,1937) is a British astronomer, the longtime director of the Minor Planet Center(MPC). He specializes in celestial mechanics and astrometry, collecting data on the positions of asteroids and comets and computing their orbits, often from minimal of the Harvard-Smithsonian Center for Astrophysics The Harvard-Smithsonian Center for Astrophysics (CfA) is located in Cambridge, Massachusetts. It consists of the Harvard College Observatory and the Smithsonian Astrophysical Observatory. The Center is located at 60 Garden Street. in Cambridge, Mass. Hale-Bopp's closest approach to the sun, on April 1, sped the melting of the comet's nucleus, making the tail longer and wider. The comet should remain bright for a few weeks, but the waxing moon may obstruct the view, Marsden said. While Hale-Bopp's fiery performance unfolds, astronomers are compiling an inventory of its ingredients. The list consists mainly of common molecules like water and carbon dioxide carbon dioxide, chemical compound, CO2, a colorless, odorless, tasteless gas that is about one and one-half times as dense as air under ordinary conditions of temperature and pressure. , but it includes some never before detected in a comet, says Harold A. Weaver of Johns Hopkins University Johns Hopkins University, mainly at Baltimore, Md. Johns Hopkins in 1867 had a group of his associates incorporated as the trustees of a university and a hospital, endowing each with $3.5 million. Daniel C. in Baltimore. These molecules--formic acid, sulfur dioxide, cyanoacetylene, [H.sub.2]CS--and new isotopes of hydrogen Hydrogen (H) (Standard atomic mass: 1.00794(7) u) has three naturally occurring isotopes, denoted 1H, 2H, and 3H. Other, highly unstable nuclei (4H to 7 cyanide and carbon monosulfide may have existed in other comets but in such tiny proportions that they were hidden behind more abundant ones. "You need a very bright comet like Hale-Bopp to detect them, "says Weaver. The comet's next appearance is tentatively scheduled for 4397. |
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