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TO THE EDITOB. is a planet named Vulcan, which is very difficult of observation on account of its close proximity to the sun, within the orbit of Mercury. I think this must have been the planet that Professor Corrigan saw while anxiously pursuing bis research of the sun spots. All honor to the professor. But there is-a limit to man’s knowledge. Even Sir Isaac Newton made the statement that all. he knew was just to be compared to a child gathering pebbles along the seashore, seeking out for the brighter pebble, while the great ocean before him lay unexplored. Mercury is thirty-fire millions of miles from the sun ; therefore, according to Bead’s law, Vulcan cannot be more than sixteen or seventeen millions of of miles—perhaps not so snuch—and . the ■ nearer planets ore to the sun the. greater the velocity in their orbits. ■ The- most distant planet, Neptune, is 11,958 miles per hour; the Earth, 65,533; Mercury, 105,330; and Vulcan in proportion to the others—therefore its observation becomes very difficult indeed. It is not often seen, even with a powerful telescope, as it must complete its revolution round the sun in less than one month, and when visible it seta almost as soon as the sun itself. There is no cause for : alarm, as Vulcan has been sweeping for ages round the sun, and in all probability will continue to do so for ages more to come;- A r ' solar system that has been established by an all-powerful hand will take more to diaturb its equilibrium than man’s thoughts.—l am, etc.. Alaska. Dunedin, November 12.

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Bibliographic details

THE TERRIFYING PLANET., Evening Star, Issue 10469, 12 November 1897

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THE TERRIFYING PLANET. Evening Star, Issue 10469, 12 November 1897