May 3, 2021: The slightly gibbous moon is near Saturn this morning before sunrise. The lunar orb is 6.8° to the lower right of the Ringed Wonder. Jupiter is to the lower left of Saturn.
by Jeffrey L. Hunt
Chicago, Illinois: Sunrise, 5:44 a.m. CDT; Sunset, 7:52 p.m. CDT. Check local sources for sunrise and sunset times for your location.
During a 24-hour interval, five planets and the moon are visible. This morning the slightly gibbous moon is a guide to the morning planets, Jupiter and Saturn. (The moon reaches its Last Quarter phase later today, 2:50 p.m. CDT.)
Venus, Mercury, and Mars are visible in the western sky after sunset.
An hour before sunrise, the lunar orb is over 18° above the south-southeast horizon. Two bright “stars” are to the moon’s upper left.
Saturn is the one closer to the moon, 6.8° to the moon’s upper left.
Brighter Jupiter is 15.5° to the lower left of Saturn.
Detailed Note: One hour before sunrise, the moon (21.3d, 54%) is over 18° above the south-southeast horizon. The lunar slice is 6.8° to the lower right of Saturn. Bright Jupiter is 15.5° to the lower left of Saturn. In the starfield, Saturn is 0.9° to the right of θ Cap, while Jupiter is 1.3° above ι Aqr. The moon is at its Last Quarter phase at 2:50 p.m. CDT. Twenty minutes after sunset, Venus is nearly 5° above the west-northwest horizon. Have you observed it without a binocular? Mercury (m = −0.9) is 6.4° to the upper left of Venus. This might be the last evening to see Rigel, “Orion’s left knee,” (β Ori, m = 0.2), without optical assistance near the horizon about 40 minutes after sunset. Forty-five minutes after sunset, Mercury is nearly 7° up in the west-northwest, 2.1° to the lower left of η Tau. Fifteen minutes later, Mercury is only 4° above the horizon. Mars is over 36° to the upper left of Mercury and below the Gemini Twins, Castor and Pollux. In the starfield, Mars is 2.4° to the upper right of μ Gem and 3.0° to the lower right of ε Gem.
Read more about the planets during May 2021.
July 26, 2021: Four bright planets are in the evening sky. Mars closes in on Regulus for their conjunction in three evenings. Brilliant Evening Star Venus appears to the upper left of the impending Mars – Regulus conjunction. Saturn and Jupiter are low in the southeastern sky after sunset.
July 25, 2021: Four evenings before its conjunction with Regulus, find Mars in the western sky to the lower right of Venus. As the calendar day ends, look for the moon below bright Jupiter.
July 24, 2021: After sunset, Venus and Mars are in the western sky. A little later during evening hours, the moon is near Jupiter and Saturn in the southeast.
July 23, 2021: Four bright planets are visible during evening hours. Venus and Mars are in the western sky after sunset. A little later, the moon is near Saturn and Jupiter in the southeastern sky.
July 29, 2021: Jupiter and Mars are 180° apart along the ecliptic. Dim Mars sets in the west-northwest as Jupiter rises in the east-southeast. This event signals that soon both appear in the sky simultaneously.