Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 24, 2025
At the extremity of the western arm of the cross is delta, a close double, difficult for telescopes of moderate aperture on account of the difference in the magnitudes of the components. We may succeed in dividing it with the five-inch. The magnitudes are three and eight, distance 1.5", p. 310°. It is regarded as a binary of long and as yet unascertained period.
It determines the velocity of rotation of the sun and of nebulæ, the existence and periods of orbital revolution of binary stars too close to be separated by any telescope, the presence of magnetic fields in sunspots, and the fact that the entire sun, like the earth, is a magnet.
Moreover, the majority of those actually recorded were of an unmistakable spiral character, and they included most of Sir John Herschel's "double nebulæ," previously supposed to exemplify the primitive history of binary stellar systems. Dr. Max Wolf's explorations with a 6-inch Voigtländer lens in 1901 emphatically reaffirmed the inexhaustible wealth of the nebular heavens.
The divisions of the currency should be the simplest possible, that is, binary, and the definitions of the parts should be as simple as those of coins.
Now it is evident that a spectroscopic binary, if the plane of its motion made a very small angle with the line of sight, would be a variable star. For, during a few hours of each revolution, some at least of its light should be cut off by a transit of its dusky companion. Such "eclipse-stars" are actually found in the heavens.
These observations were made by adjusting a micrometer to a very powerful telescope, and were data sufficient for the determination of the orbit of the revolving star, should it be a binary system.
There are only two noteworthy doubles in that part of Ophiuchus with which we are at present concerned: 36, whose magnitudes are five and seven, distance 4.3", p. 195°, colors yellow and red; and 39, magnitudes six and seven and a half, distance 12", p. 356°, colors yellow or orange and blue. The first named is a binary whose period has not been definitely ascertained.
I have given an account of this in the "Connexion of the Physical Sciences," so I shall only mention here that in one or two of the binary systems the revolving star has been seen to make more than one revolution, and that the periodical times and the elliptical elements of a great many other orbits have been calculated, though they are more than 200,000 times farther from the sun than we are.
Moreover, this tie of an identical movement was discovered to unite bodies far beyond the range of distance ordinarily separating the members of binary systems, and to prevail so extensively as to lead to the conclusion that single do not outnumber conjoined stars more than twice or thrice.
The new psychology went further, and seemed convinced that it had actually split personality not only into dualism, but also into complex groups, like telephonic centres and systems, that might be isolated and called up at will, and whose physical action might be occult in the sense of strangeness to any known form of force. Dualism seemed to have become as common as binary stars.
Word Of The Day
Others Looking