Will be evening star during the month, setting at 6:38 on the evening of the 1st, and at 7:50 p. m. on the 31st. Her motion is direct, amounting, during the month, to 2 hours, 24 minutes, 38 seconds, equal to 36° 9½′ of arc, her diameter increasing from 11.6′ to 12.8′. This planet will delight the vision of star-gazers, not only during January, but several succeeding months. MARS Will continue his retrograde motion during the month, moving a little more than one minute per day, making in all 35 minutes 37 seconds. He will be quite a prominent object during the entire night, on the evening of the 1st, rising at 7:50, and on the following morning setting at 9:58; and on the 31st rising at 5:08 p. m., and setting at 7:44 the next morning. His diameter at the latter date will be 15″. Can be readily found in the constellation _Leo_, northwest of the bright star Regulus. At 1:29 p. m. on the 14th he will be 9° 18′ north of the moon. JUPITER Will commence the month as a morning star, rising on the 1st at 6:19 in the evening, and setting next morning at 8:45; but on the 13th will change to an evening star, being on this date in opposition to the sun, and rising as the latter sets at about 5:00 p. m. On the 13th, at 2:53 a. m., he will be 5° 41′ north of the moon. On the 31st he will rise at 4:00 p. m., and next morning will set at 6:34. His diameter at same date will be 43.8″. Motion during the month, 16 minutes 12.54 seconds retrograde. The eclipses of this planet’s moons, by the body itself, are sometimes used for the purpose of determining longitude. He will be found in the constellation _Cancer_. SATURN, “The father of gods and men,” rises on the 1st at 2:18 p.m.; sets on the 2d at 4:34 a. m., being over 14 hours above the horizon. On the 31st it rises at 12:12 p. m. and sets next morning at 2:32. Has a retrograde motion of 4 minutes 3.61 seconds. On the 9th at 2:14 a. m. it is only 59′ north of the moon. Its diameter is about 18 seconds. Can be found in the constellation _Taurus_, a little northwest of Aldebaran, the brightest star of the cluster _Hyades_. URANUS Is morning star for the month. On the 1st it rises at 11:08 in the evening; on the 2d at about 10:00 a. m. Although traveling at the rate of over one and one-fourth million miles per hour, it is said to be stationary. As in the case of Mercury, it moves toward us for the time in an almost straight line, and “is not what it seems.” It has from the 2d to the end of the month a retrograde motion of 21 minutes 15 seconds of arc. Its diameter is 3.8 seconds. On the 31st it rises at 9:07 in the evening. NEPTUNE