July, 2021: During the early evening sky, Hercules is nearly overhead as evening twilight ends. The constellation has a spectacular star cluster.
July 1 – July 7, 2021, the waning crescent appears in the eastern sky. Early in the viewing period, the moon is among the dim stars of Pisces. As the week progresses, the moon wanes and moves farther eastward, appearing near Taurus.
The Perseid meteor shower peaks on the morning of August 12. This year promises favorable observing without the moon. The meteors are the dust from comet that vaporize when they strike the atmosphere. Sirius may be visible in the southeast about 45 minutes before sunrise.
June 15, 2021: The Pleiades star cluster returns to the morning sky. You may have observed the star cluster in the east-northeast during morning twilight.
May 5, 2021: Brilliant Venus, Mercury, and Mars are visible in the western sky after sunset. Venus is visible low in the west-northwest about 30 minutes after sunset. By 45 minutes after sundown, Mercury is visible to the brilliant planet’s upper left. Mars is easily visible and hour after the sun sets, about one-third of the way up in the west, in front of the stars of Gemini.
May 4, 2021: This morning the moon is near Jupiter and Saturn before sunrise. Look about an hour before sunup. Bright Jupiter is to the upper left of the thick lunar crescent, while Saturn is to the upper right.May 4, 2021: Three planets are visible after sunset. Brilliant Venus is low in the west-northwest after sundown. Mercury is above Venus. It is visible lower as the sky darkens. As night falls, Mars is over a third of the way up in the west, under Castor and Pollux, the Gemini Twins.
May 3, 2021: Three bright planets are visible after sunset. Brilliant Venus is low in the west-northwest, with Mercury to its upper left. As the sky darkens further a binocular reveals that speedy Mercury is to the lower left of the Pleiades star cluster. Mars is visible in a darker sky in Gemini, below Castor and Pollux.
May 2, 2021: Five bright planets are visible during a 24-hour interval. This evening, brilliant Evening Star Venus is in the west-northwest during bright twilight. Mercury is above Venus. Mercury is 3.4° to the lower left of the Pleaides star cluster. Mars is higher in the west when night falls.
April 20, 2021: Venus is very low in the west-northwest after sunset. The gibbous moon is in Cancer, between Regulus and Pollux. Mars, above the horns of Taurus, approaches the star cluster Messier 35.
April 17, 2021: During the early evening, the crescent moon is above Mars in the western sky. Use a binocular to spot the star cluster M35 near the moon. Mars is above the Bull’s horns.