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Updated: May 24, 2025
Sir James South established an observatory at Campden Hill, near Kensington, where he and Sir John Herschel united in observing the double stars and binary systems with the view of affording further data for improving our knowledge of their movements.
So we find parallax, proper motion, double stars, binary systems, variable stars, and new stars all bound together.
The northern-most pair is named epsilon1, the magnitudes being fifth and sixth, distance 3", p. 15°. The other pair is epsilon2, magnitudes fifth and sixth, distance 2.3", p. 133°. Each pair is apparently a binary; but the period of revolution is unknown. Some have guessed a thousand years for one pair, and two thousand for the other.
The determination of parallax leads, in the case of stars revolving in known orbits, to the determination of mass; for the distance from the earth of the two bodies forming a binary system being ascertained, the seconds of arc apparently separating them from each other can be translated into millions of miles; and we only need to add a knowledge of their period to enable us, by an easy sum in proportion, to find their combined mass in terms of that of the sun.
It is apparently a binary, and if so will some time widen again, but its period is unknown.
But afterward, when the cross and grave are passed, then the fullness of joy and the pleasures, which are at God's right hand forever-more! We may follow Christ, and yet our paths diverge. Peter and John had been close friends. In them, the binary stars of love and zeal, labor and rest, action and contemplation, revolved in a common orbit.
But since they vastly outnumber the binary and multiple systems, and since they resemble the sun in having no large attendants, should we be justified, after all, in regarding our system as "unique"? It is true we do not know, by visual evidence, that the single stars have planets, but we find planets attending the only representative of that class of stars that we are able to approach closely the sun and we know that the existence of those planets is no mere accident, but the result of the operation of physical laws which must hold good in every instance of nebular condensation.
How incomprehensible, that considerations such as this did not at once indicate to them the true state of affairs that of the binary revolution of our sun and Alpha Lyrae around a common centre of gravity! April 7. Continued last night our astronomical amusements.
She knew as well as I did that the royalties from my books the last year were as follows: "The Star Gamma in Leo and Its Satellite" . . . . . $1.60 "Mars and Its Ice-Caps" . . . . . . . . . . . . . . .75 "Probable Depth of the Bottle-Neck Seas as Indicated by the Spectroscope" . . . . . . . . . .30 "Logarithms for the Nursery" . . . . . . . . . . . . 1.15 "Alphabetical Catalogue of Binary Stars" . . . . . . .65 Total $4.45
It follows that the number called the infinite binary must be science; in every demonstration or belief belonging to science, and in every syllogism, we draw that conclusion which is in dispute from those propositions which are by all granted, by which means another proposition is obtained from the premises.
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