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Updated: May 12, 2025
In the constellation of Cygnus there are two stars, a blue and a yellow one, which are near enough to each other to be seen in the same telescope at the same time, and yet in reality are separated by an almost incredible number of billions of miles.
In 1876 a temporary star appeared in the constellation Cygnus, and attained at one time the brightness of the second magnitude. Its spectrum and its behavior resembled those of its immediate predecessor. In 1885, astronomers were surprised to see a sixth-magnitude star glimmering in the midst of the hazy cloud of the great Andromeda Nebula. It soon absolutely disappeared.
Thus things went on until 1837, when Bessel announced that measures with a heliometer the most refined instrument that has ever been used in measurement showed that a certain star in the constellation Cygnus had a parallax of one-third of a second. It may be interesting to give an idea of this quantity.
What statues might we form, from the wonderful tales which he relates! Niobe at the head of the canal, changing into stone! To be sure we should want a rock there. Then on one side Narcissus, gazing at himself in the clear pool, with poor Echo withering away in the grove behind! King Cygnus, in the very act of being metamorphosed into a swan, on the other!
The fleet went into a polar orbit around that gigantic planet, which was useless to mankind because its atmosphere was partly gaseous ammonia and partly methane. The cosmos paid no attention. An unstable sol-type star in Cygnus collapsed abruptly and a number of otherwise promising planets became unfit for human exploitation. In Andromeda, a super-nova flared.
It is now ascertained, however, not only that these two are specifically distinct, but that in North America there exist two other species, differing from the Cygnus Americanus, and from each other. The common American species is of a pure white, with black hill, logs, and feet.
He arrived at a goal for the sun's way shifted eastward to the constellation Cygnus a result congruous with the marked tendency of recently determined apexes to collect in or near Lyra; and the most probable corresponding velocity seemed to be about nineteen miles a second, or just that of the earth in its orbit.
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