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Updated: June 24, 2025
They staid fifteen days in Florence, scourging themselves before the altars of the Dominican churches, and feasting, five hundred at a time, in the Piazzi di S. M. Novella. 'On their journey, when they came to a cross-road or to crosses, they threw themselves on the ground, crying Misericordia three times; then they recited the Lord's Prayer and the Ave Maria.
The young men read him shrewdly, but speaking was useless. Before Carlo parted from Luciano, he told him the burden of the whisper, which had confirmed what he had heard on the Piazzi d'Armi.
As he was pleased to identify himself with the glory, genius, and fortune of the great man whose name he bore, he resolved on a representation of the triumph of Julius Caesar, to be given on the Piazzi di Navona, the ordinary place for holding the carnival fetes.
Giuseppe Piazzi was born at Ponte in the Valtelline, July 16, 1746.
PIAZZI SMYTH. A conspicuous little ring-plain, 5 or 6 miles in diameter, depressed about 1500 feet below the Mare Imbrium, with a border rising about 2000 feet above it. With the curious arrangement of ridges, of which it is the apparent centre, it is a striking object under a low sun. KIRCH. A rather smaller object of the same class on the S.E.
Thus astronomy became a truly universal science; uncertainties and disparities were banished, and observations made at all times and places rendered mutually comparable. More, however, yet remained to be done. In order to verify with greater strictness the results drawn from the Bradley and Piazzi catalogues, a third term of comparison was wanted, and this Bessel undertook to supply.
Though unpremeditated, this discovery was not unexpected, for astronomers had long surmised the existence of a planet in the wide gap between Mars and Jupiter. Indeed, they were even preparing to make concerted search for it, despite the protests of philosophers, who argued that the planets could not possibly exceed the magic number seven, when Piazzi forestalled their efforts.
As soon as Piazzi, Olbers, and Harding had discovered three of the numerous telescopic planets now known, Herschel proposed to himself to determine their real magnitudes; but telescopes not having then been applied to the measurement of excessively small angles, it became requisite, in order to avoid any illusion, to try some experiments adapted to giving a scale of the powers of those instruments.
Even at this day I do not know that any other observatory can show a circle eight feet in diameter graduated all round. I think it is Professor Piazzi Smith who tells us how grateful he was to find a large telescope he had ordered finished by the opticians on the very day they had promised it. The day was perfectly correct; it was only the year that was wrong.
On January 1st, 1801, he observed a star which had changed its place the next night. Its motion was retrograde till January 11th, direct after the 13th. Piazzi fell ill before he had enough observations for computing the orbit with certainty, and the planet disappeared in the sun's rays.
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