September 29, 2021: The thick crescent moon is in the southeast before sunrise, approaching the middle of Gemini. The evening planet pack is visible after sunset.
Saturn
2021, September 28: Morning Moon, Evening Planets
September 28, 2021: This morning the moon, as it approaches its Last Quarter phase, is high in the south at the Gemini – Taurus border. The evening planet pack – Venus, Jupiter, and Saturn – brightly shine after sunset.
2021, September 27: Moon Between the Horns, Evening Planet Pack
September 27, 2021: Before sunrise this morning, the bright moon seems caught between the horns of Taurus, Elnath and Zeta Tauri. The planet pack, Venus, Jupiter, and Saturn, are visible after sundown.
2021, September 25: Morning Moon, Evening Planet Pack
September 25, 2021: The bright morning moon approaches the Pleiades star cluster and Aldebaran. In the evening sky, brilliant Evening Star Venus, Jupiter, and Saturn are easy to spot.
2021, September 23: Venus Passes a Claw
September 23, 2021: Three bright planets shine in the sky during the early evening. Brilliant Venus is in the southwestern sky after sunset. This evening it passes Zubenelgenubi – “the southern claw.” Bright Jupiter and Saturn are in the southeastern sky during the early evening.
2021, September 22: Autumnal Equinox
September 22, 2021: The sun’s light is most direct at the equator at 2:21 p.m. CDT, signaling the beginning of the autumn season in the northern hemisphere.
2021, September 20: Harvest Moon, Bright Planets
September 20, 2021: The Harvest Moon occurs at 6:55 p.m. CDT, the full moon that occurs closest to the autumnal equinox. In addition to the full moon, three bright planets are in the evening sky – Venus, Jupiter, and Saturn.
2021, September 19: Three Evening Planets, Bright Moon
September 19, 2021: Three bright planets – Venus, Jupiter, and Saturn – are easily visible after sunset, along with the nearly-full moon.
2021, September 15-22: Evening Planets, Harvest Moon Effect
September 15-22, 2021: The moon passes evening planets Saturn and Jupiter as a lead in to the Harvest Moon and the geometrical effects of the sky, known as the Harvest Moon Effect
2021, September 13: Mercury at Greatest Elongation
September 13, 2021: Mercury reaches greatest elongation tonight. It is a challenge to see in the bright twilight.