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" ... system. In answer to a question he said that his theory explained why the aphelion distance of a comet is generally about the same as the distance of the planet which rendered its orbit elliptic. The author then publicly stated that there could be... "
Monthly Notices of the Royal Astronomical Society - Page 497
by Royal Astronomical Society - 1892
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Proceedings, Volume 10

Royal Society of Edinburgh - 1880 - 864 pages
...then publicly stated that there could be no longer a doubt that two planets exist beyond the orbit of Neptune, one about 100 times, the other about 300 times the distance of the earth from the gun, with periods of revolution of about 1000 and 5000 years respectively. If this be the case, the...
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Astronomy and Astro-physics, Volume 11

1892 - 1552 pages
...more planets exist beyond the orbit of Neptune has been long entertained by astronomers, and Professor Forbes, in a remarkable paper on "Comets and ultraNeptunian...present position of one of the hypothetical planets is 11" 48"' RA and 3° N. Declination, and he believed that a range of 5° each way in RA and of 2J or...
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The Observatory, Volume 15

1892 - 544 pages
...planets could be no longer in doubt, and that their orbits were respectively at about 100 times anil 300 times the distance of the Earth from the Sun. In 1887 Mr. Roberts wrote to Prof. Forbes, the author of tho p:ipsr, for further particulars, and he replied,...
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Proceedings of the Royal Society of Edinburgh, Volume 10

Royal Society of Edinburgh - 1880 - 850 pages
...then publicly stated that there could be no longer a doubt that two planets exist beyond the orbit of Neptune, one about 100 times, the other about 300 times the distance of the earth from the sun, with periods of revolution of about 1000 and 5000 years respectively. If this bo the case, the...
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Proceedings of the Royal Society of Edinburgh, Volume 10

Royal Society of Edinburgh - 1880 - 874 pages
...then publicly stated that there could be no longer a doubt that two planets exist beyond the orbit of Neptune, one about 100 times, the other about 300 times the distance of the earth from the sun, with periods of revolution of about 1000 and 5000 years respectively. If this be the case, the...
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