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النشر الإلكتروني

SPHERE OF THE FIXED STARS.

Telescopic Objects.

Castor. The stars are both white, and of nearly equal magnitude; may be distinctly seen with a telescopic power of 100. No. 1, in the engraving of double

stars.

Rigel, the double star in the foot of Orion, is visible with any power between 80 and 130, the small star is of a reddish tint. No. 2.

The triple star in the right fore foot of Monoceros, requires a power of 120; it has been considered one of the most beautiful objects in the heavens. No. 3.

n in Corona Borealis, is an exceedingly delicate double star, and can only be seen under very favourable circumstances; it requires not only a very perfect, but also a very large telescope. No. 4.

Polar Star. The two stars are exceedingly unequal in size; this double star may be seen with any power higher than 40. No. 5.

ε in Bootes, is seldom seen distinctly defined with a power below 250; the smaller of the two stars is of a blue colour, the intensity of which increases in proportion to the proximity to the horizon. No. 6.

ε in Lyra, with the low telescopic power of 5, resembles Castor, when magnified with 450. With the power of 120, this beautiful double-double or quintuple star, may be seen as in the engraving of double stars.*

When it is proposed to view any of the minute double stars, such as ʼn in Corona Borealis, let the telescope be some time before directed to Castor, or ɛ in Lyra; these

* Castor, No. 1, the upper figure on the left of the engraving. Rigel, No. 2, the upper figure on the right, &c.

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Castor. The stars are both white, and of norty equal magnitude; may be distinctly seen with

copic power of 100. No. 1, in the engraving of del

Rigel, the double star in the foot of Orion, is v with any power between 80 and 130, the small star... Fa reddish tint. No. 2.

The triple star in the right fore foot of Monoceros requires a power of 120; it has been consideral one the most beautiful objects in the heavens, No. 3.

in Corona Borealis, is an exceedingly delicat double star, and can only be seen under very favorabi. circumstances; it requires not only a very periot, but also a very large telescope. No. 4.

Polar Star. The twe stars are exceedingly equa in size: this double star may be seen with any power higher than 40. No. 5.

z in Bootes, is seldom seen distinctly defined with u power below 250; the smaller of the two stars of. blue colour, the intensity of which increases in proper tion to the proximity to the horizon. No. 6,

in Lyra, with the low telescopic power of 5, n sembles Castor, when magnified with 450. With the power of 120, this beautiful double-double or quintupl. star, may be seen as in the engraving of double stars.

When it is proposed to view any of the minute doubl stars, such as in Corona Borealis, let the telescope be some time before directed to Castor, or in Lyra; these

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Castor, No. 1, the upper ligere on the left of the engravin Rigel, No. 2, the upper figure on the right, e

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