Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 19, 2025
The former appeared about once and a quarter, the latter but three quarters, the size of the terrestrial moon, and the travellers immediately recognized them by their sizes and relative positions as Tethys and Dione, discovered by J. D. Cassini in March, 1684.
Down to that moment, the Kaiser, rightly or wrongly, had counted as the ally of the Czar in all matters relating to the East. Holleben and Cassini were taken to be a single force in Eastern affairs, and this supposed alliance gave Hay no little anxiety and some trouble.
By the 25th, Venus was sufficiently remote to preclude any further fear of collision. Ben Zoof gave a sigh of relief when the captain communicated the glad intelligence. Their proximity to Venus had been close enough to demonstrate that beyond a doubt that planet has no moon or satellite such as Cassini, Short, Montaigne of Limoges, Montbarron, and some other astronomers have imagined to exist.
The transit of Venus which was to take place on June 6 in that year led to some inquiry as to the satellite supposed to have been seen by Cassini and Short, for of course a transit would be a favourable occasion for observing the satellite. M. Montaigne, who had no faith in the existence of such an attendant, was persuaded to look for it early in 1761.
The discovery did not attract so much attention as it deserved, insomuch that when Cassini, ten years later, announced the discovery of a corresponding dark division on the southern surface, none recalled the observation made by the brothers Ball. Cassini expressed the opinion that the ring is really divided into two, not merely marked by a dark stripe on its southern face.
Yet so much could be said in favor of the foreigners that they commonly knew why they made trouble, and were steady to a motive. Cassini had for years pursued, in Peking as in Washington, a policy of his own, never disguised, and as little in harmony with his chief as with Hay; he made his opposition on fixed lines for notorious objects; but Senators could seldom give a reason for obstruction.
"Well," said Jack, "when you have made some discovery that will enrol your name with Descartes, Huygens, Cassini, and such gentlemen, you will do us the honor of letting us know." "With the greatest pleasure." "It is a pity that Herschell has invented the telescope: he might have left you a chance for the glory of that invention."
Calippus has not apparently a central peak or any other features on the floor. CASSINI. This remarkable ring-plain, about 36 miles in diameter, is very similar in character to Posidonius. It has a very narrow wall, nowhere more than 4000 feet in height, and falling on the E. to 1500 feet.
Cassini gave the rotation as twenty-three hours, by observing a bright spot on her surface. Shroter made it 23h. 21m. 19s. This value was supported by others. In 1890 Schiaparelli announced that Venus rotates, like our moon, once in one of her revolutions, and always directs the same face to the sun.
In 1675 Cassini found the ring to be double, the concentric rings being separated by a black band a fact which was placed beyond dispute by Herschel, who also found that the thickness of the ring subtends an angle less than 0".3. Shroter estimated its thickness at 500 miles. Many speculations have been advanced to explain the origin and constitution of the ring.
Word Of The Day
Others Looking