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Dominion, Volume 10, Issue 3040, 29 March 1917, Page 6

Spmp particulars of the comet which is approaching the <iarth, and will this year be visible to the naked eye, aro given in the "Daily Express." It is one of the largest ever seen, and not' expected to be Visible from tho. ear ch again for 60,000 years after its disappearance. It will be known in astronomical circles as "Wolf's Comet," in acknowledgment of its discoverer, Professor Wolf, of Heidelberg, who first saw it on April 27 last. Dr. A. CD. Crommelin, the astronomer, says the new comet was "followed" by telescope from April until July,, when, owinjj tothe fact that the sun passed in front of it, it became invisible. It was "picked up" a few days ago'by the telescopes of one of the great observatories in America, and tho fact was briefly cabled to Greenwich. "It is now observed as. a morning star," says Dr. Crommelin, "but it is. .visible only through telescopes. It will continually approach noarer the earth until July, when it will become a faint naked eye object, but not a grand one, owing to its great distance from the sun. Its least distance from the earth is one and twothirds the earth's distance from the sun —that is to say, it is far outside Jthe earth's orbit, and comets that distance away do not make a brilliant display. As tho sun's mean distance from the earth is about 92,800,000 miles, tho nearest point to the earth which the comet will reach will be about 164,000,000 miles. "In July," added Dr. Crommelin, "the new comet will be getting away from the sun, and nearer the earth. It will bo followed by' telescopes for a. year after that, -until -towards the end of 1918. Altogether it will be under,, observation for about two and two-third years, whereas Halley's Comet was visible for only one and one-third years.]'

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