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Updated: May 14, 2025
No accurate count of asteroids—or minor planets, as they were called—had been made, but the observatory on Mars had charted the orbits of over 100,000. Most of them were only a mile or two in diameter. Others, much smaller, had never been charted by anyone. One leading astronomer had estimated that as many as 50,000 asteroids filled the belt. "I know the usual stuff about them," he told O’Brine.
There the case rested till 1845, when a Prussian amateur astronomer named Hencke found another asteroid, after long searching, and opened a new epoch of discovery. From then on the finding of asteroids became a commonplace.
No accurate count of asteroids or minor planets, as they were called had been made, but the observatory on Mars had charted the orbits of thousands. A few were more than a mile in diameter, but most were great boulders of irregular shape, from a few feet to several hundred feet at their greatest dimension. "I know the usual stuff about them," he told O'Brine. "I haven't any special knowledge."
These announcements would have received little attention but for the fact that the motion of Mercury has irregularities which have not been accounted for by known planets; and Le Verrier has stated that an intra-Mercurial planet or ring of asteroids would account for the unexplained part of the motion of the line of apses of Mercury's orbit amounting to 38" per century. Mars.
And now they hope to convince the lawmakers that we're incompetent to administer the Martian colonies and keep peace out here. If they succeed, we'll be called home in nothing flat; we've had to fight just to stay." The Major spread his hands helplessly. "Like I said, it's been a war. Our only hope was to prove that the company was using piracy and murder to gain control of the asteroids.
You will have a fine view of Mars and the asteroids, and when 1,169,000 miles from Jupiter, will cross the orbit of Callisto, the fifth moon in distance from the giant planet. That will be your best point to steer by."
Many of the asteroids have very eccentric orbits, and their orbits are curiously intermixed, varying widely among themselves, both in ellipticity and in inclination to the common plane of the solar system.
Brünnow's favorite pupil, James C. Watson, '57, to succeed him as Professor of Astronomy and Director of the Observatory. Professor Watson's brilliant work had already attracted wide attention, he "was bagging asteroids as though he lured them with a decoy" though he was at that time still a very young man, and his methods as a teacher somewhat peculiar.
I should keep well within the limit of that early excess now, and should not liken the creation of Shakespeare to the creation of any heavenly body bigger, say, than one of the nameless asteroids that revolve between Mars and Jupiter.
There is every reason to think that the inner planets possess the greater amount of dense elements, while the outer ones are comparatively light." But another referred to the old theory that there was once in this part of the solar system a planet which had been burst in pieces by some mysterious explosion, the fragments forming what we know as the asteroids.
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