Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: August 29, 2024
Every effort had been made to so adjust the electric charge upon the ships that they would be repelled from the cometic mass, but, owing apparently to eccentric changes continually going on in the electric charge affecting the clashing mass of meteoric bodies which constituted the head of the comet, we found it impossible to escape from its influence.
Severally subject to great heat at perihelion, these would behave more or less differently. Once more, it would ordinarily happen that detached swarms of meteors projected as implied, would carry with them masses of vapours and gases; whence would result the cometic constitution now insisted on. And sometimes there would be like accompaniments to meteoric streams.
Some physicists believe that Encke's Comet, with its retarded motions, will some day fall into the sun; while others fancy that such a consummation can never take place, because successive portions of its substance will be thrown off by the tail-forming process with each perihelion return; so that long before the cometic mass could reach the sun, it will have been altogether dissipated into space, and nothing will be left to accomplish the final state of the fall.
"I have seen," he says, "double and treble nebulæ variously arranged; large ones with small, seeming attendants; narrow, but much extended lucid nebulæ or bright dashes; some of the shape of a fan, resembling an electric brush, issuing from a lucid point; others of the cometic shape, with a seeming nucleus in the centre, or like cloudy stars surrounded with a nebulous atmosphere; a different sort, again, contain a nebulosity of the milky kind, like that wonderful, inexplicable phenomenon about Theta Orionis; while others shine with a fainter, mottled kind of light, which denotes their being resolvable into stars."
Most comets appear to have bright centres nuclei, as they are called; but these nuclei are not solid bodies, for as soon as they are viewed by powerful telescopes, they become as diffused and transparent as the fainter cometic substance.
Comets nearly always have the finest tails, and present altogether the most beautiful appearance, immediately after they have been in the closest proximity to the sun. The comet's tail seems, in reality, to be a thin oblong case of vapour, formed out of the cometic substance by the increasing intensity of the sunshine, and enclosing the denser portion of that substance at one end.
Word Of The Day
Others Looking