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النشر الإلكتروني

MARCH.

SOLAR PHENOMENA. The sun enters Aries at 11 min. after 2 of the afternoon of the 20th of this month.

LUNAR PHENOMENA.

Phases of the Moon.
New Moon, 2nd day at 14 min. after 3 afternoon.
First Quarter, 9th ...... 13 ........ 7 evening.
Full Moon, 16th ...... 22 ........ 3 afternoon.

Last Quarter, 24th ...... 41 ........ 8 morning. Conjunctions of the Moon with the Planets and Stars. March 2nd, with Jupiter.... .... 4 morning.

8th, .... Aldebaran ...... 11 night.
15th, .... Saturn .......... 1 afternoon.
24th, ....1 u in Sagittarius. 3 morning.
24th, .... 2 p in Ditto . 4
27th, .... Mars ............ 10
27th, .... Uranus.......... midnight.
29th, .... Venus ......... 3 afternoon.
30th, .... Jupiter .......... 1 morning.

PHENOMENA PLANETARUM. Mercury in conjunction with Jupiter at I in the afternoon of the 8th of this month. Greatest south latitude on the 9th. Superior conjunction with the sun at 45

min. after 10 of the evening of the 19th. Ascending node on the 28th.

Venus in her descending node on the 5th. In conjunction with Uranus at 7 in the morning of the 12th, difference in declination 18'; with u in Capricornus on the 17th, difference in latitude 4'.

Phases of Venus. The proportions of the bright and dark phases of this planet are as follow:March 1st.-Illuminated part = 9.3869

Dark part = 2.6131 Mars in conjunction with 813 Mayer, difference of latitude 3.

The Asteroids.

Hrs. Min Vesta, Ist day. Right Ascension 8 12. "N. Declin. 25° 53' 9th ... .... 8 10.

26 5 17th

8 9. ..

26 8 25th

8 11.

26 2 Juno, 1st

10 3. 9th

9 57. 17th

9 53. 25th

9 50. Pallas 1st 9th

22 9.

0 56 17th

22 19.

1 29 25th

22 29. ......

2 4 Ceres, 1st

23 30. S. Declin. 11 52 9th

... .... 10 35 17th ......

........ 9 25th . .................. 0 5. ........ 8 Jupiter in conjunction with 81 in Aquarius on the 21st; difference of latitude 13'.

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Eclipses of the Satellites. Jupiter is too near the sun to admit of any of these being visible.

Saturn in opposition at 30 min. after 6 of the morning of the 2nd.

FORM OF SATURN'S RING.
March 21st.-Semi-transverse axis 45".46

Semi-conjugate axis - 4.13 There is every reason to conclude that a more vigilant examination of the planet Saturn, by skilful observers, with exquisite instruments, would be amply repaid by extensive discoveries connected with its mysterious structure. It has only recently been observed that the ring is not concentric with the globe of Saturn, the orb being nearer to the western than the eastern side: from a mean of fifteen observations, by professor Struve, it is found that the interval between the outer edge of the globe, and the outer edge of the ring, on one side, is 11".073, and on the other side, the interval is 11".288; consequently there is an eccentricity of the globe in the ring equal to 0".215. It is suspected that the outer ring is separated by numerous dark divisions, extremely close to each other, exhibiting such an appearance as though the ring were formed of several small rings in the same plane. These divisions, which are occasionally very distinctly seen, are at other times not to be perceived, though the various circumstances with a favorable atmosphere continue the same. This has suggested the idea, that the outer ring has a very dense yet variable atmosphere, which occasionally intercepts or affords a view of these divisions. The external ring is not so bright as the internal; and the inner edge of the internal ring is less bright than the outer parts, and resembles the planet in color: the edges of the ring appear to be rounded.

Sphere of the Fixed Stars. Altitudes of the stars at the Vernal Equinox at 30 min. after 8 in the evening.

Lynx in the Zenith. Leo Minor, 55o. Coma Berenices, 30°. Cor Caroli, 36o. Arcturus, 10°. Sextans Hadlieanus, 30o. Alphora in Hydra, 251°. Procyon, 44o. Monoceros, 40°. Sirius, 20°. Lepus, 15°. Rigel, 22o. Betelgeux, 41°. Belt of Orion, 31°. Star in the summit of the southern horn of Taurus, 51°. Aldebaran, 29o. Hyades, 281°. Menkar, 15°. Arietis, 12. Musca Borealis and Triangula, 20°. Algol, 331°. Algenib, 41°. Mirach, 13°. Almaach, 25°. Capella, 63°.

TELESCOPIC OBJECTS. Orion. This is the most splendid and interesting constellation in the heavens. Bellatrix and Betelgeux, the stars that form the shoulders of Orion, present a remarkable contrast of color,—the latter shines with a fiery scintillating light. .

Double Stars. O, ę, n, d, e, and Rigel in the left foot of Orion; 23, 26, 32, 33, 38, 52, 59, and 68, are also double stars; west of Betelgeux are two double stars. Between 1 and Betelgeux is a cluster of stars ; x is composed of five stars; between v and § is a cluster of stars; another cluster is near 73. o and I are quintuple stars. is a multiple star. . A little below 1, in the sword of Orion, is the most remarkable nebula in the heavens.

COMETARY ASTRONOMY. To facilitate the explanation of the phenomena of comets, it is proposed to point out those peculiarities in wbich they resemble, and those in which they differ from planets.

The following diagram will illustrate some of the terms employed in this branch of Astronomy.

The ellipse is intended to represent the orbit of a comet; the sun is situated in one of the foci, S. The major axis, PA. Semi-axis major, PO. The place of perihelion, P. Perihelion distance, PS. The place of aphelion, A. Aphelion distance, AS. The minor axis, MN. The eccentricity, O S.

Comets and Planets. Planets perform an apparent revolution round the earth in twenty-four hours; this is also the case with comets during the time of their being visible. This

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