March Brings Cluster of Planets Into View
Early in March, the planets Mars, Mercury, Neptune and Jupiter are clustered in the constellation Capricorn in the morning twilight. They are spread along the east-northeast horizon. Jupiter is conspicuous at magnitude -2.0. Mercury shines at -0.1 at the beginning of March, brightening as it dips toward the horizon through the month to 0.9, then becoming lost in the glare of the sun. Mars remains at magnitude 1.2, moving along with Neptune (very hard to spot in the twilight at magnitude 8) into the constellation Aquarius by month's end. On March 1, Mercury and Mars lie within about a half degree. About 6:30 a.m. on March 23, you may be able to spot Neptune a half degree below the slim crescent of the moon. Saturn remains in Leo all month, at magnitude 0.5. The rings are almost edge-on from our perspective here on Earth. The rings only are about 100 to 300 yards thick and are difficult to spot now without a large telescope. This 173,000-mile-wide band of mostly ice crystals will ap...