January 19, 2021: Mercury is low in the west-southwest after sunset. The moon is approaching Mars before their grouping tomorrow evening. Mars nears the planet Uranus before tomorrow’s conjunction.
by Jeffrey L. Hunt
Chicago, Illinois: Sunrise, 7:14 a.m. CST; Sunset, 4:50 p.m. CST. Check local sources for sunrise and sunset times for your location.
Mercury is visible low in the west-southwest after sunset. Look about 7.0° above the west-southwest horizon. You’ll need a binocular to see the planet. It appears as a single “star.”
As the sky darkens further, look for Mars over 15° to the upper left of the thick crescent moon. The moon is over 50° up in the south-southwest, while Mars is over two-thirds of the way up in the south from the horizon to overhead (zenith).
Use a binocular to locate 19 Arietis (19 Ari on the chart). Mars is 0.9° below the star. Aquamarine Uranus is over twice that distance to the lower left of Mars.
The planet’s brightness is at the limit of human eyesight. With streetlights and the brightening moon, you’ll need a binocular to locate the planet as it appears as a dim “star.” You’ll need at least 100x of magnification through a telescope to see the planet’s spherical shape, what is called the planet’s “disk.”
Tomorrow evening the Mars is closer to planet Uranus and the moon is close to this planetary pair.
Read about Mars during January.
Detailed Note: One hour before sunrise, the Gemini Twins – Castor and Pollux – are less than 15° in altitude above the west-northwest horizon. Thirty minutes after sunset, Mercury is 7.0° up in the west-southwest. One hour after sunset, the moon (6.8d, 42%) is over 50° in altitude above the south-southwest horizon. Mars – over 17° to the upper left of the moon – is over two-thirds of the way up in the south. It is 8.9° below Hamal, 0.9° below 19 Ari, and 1.6° to the upper right of Uranus.
Read more about the planets during January.
For a consolidated view of the daily activity of the planets and moon, subscribe to the Sky Calendar from Abrams Planetarium for $12 for a year. Each month’s sky events are displayed in calendar form. The opposite side of the page includes a star map. This is an easy reference to put on your refrigerator or bulletin board. No technology needed! Monthly calendars are mailed each quarter.
LATEST ARTICLES
- 2026, April 13: Venus and Jupiter Shine After Sunset While Crescent Moon Appears Before Sunrise
April 13, 2026: Venus dominates the western sky after sunset while Jupiter shines higher in the sky. Before sunrise, find a waning crescent moon with earthshine in the east-southeast. - 2026, April 12-14: Waning Crescent Moon and Earthshine Before Sunrise
April 12-14, 2026: The waning crescent moon appears low in the southeast before sunrise. Watch it pass Deneb Algedi and photograph earthshine during the final mornings before new moon. - 2026, April 11: Spring Evening Sky – Spica, Hydra, Corvus, and Crater After Sunset
April 11, 2026: Two hours after sunset, find Spica low in the southeast with Hydra passing beneath it. Locate Corvus and Crater riding on the Snake’s back in the spring evening sky. - 2026, April 10: Spring Evening Sky – Leo, Cancer, and Hydra the Snake After Sunset
April 10, 2026: Leo stands high in the southern sky while faint Cancer and the Beehive Cluster appear nearby. Below them, Hydra the Snake stretches eastward toward Spica, marked by the solitary glow of Alphard. - 2026, April 9: Sun, Moon, and Planet Almanac
April 9, 2026: The Last Quarter moon appears before sunrise in front of Sagittarius while Venus and Jupiter dominate the evening sky. Track daylight changes and planetary visibility.