2020, December 8: Jupiter Moves Toward Saturn, Mars Marches Eastward

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2020, December 8: One hour after sunset, Jupiter is 1.1° to the lower right of Saturn. The planets are in the southwest.

December 8, 2020: The Great Conjunction countdown: 13 days.  Jupiter continues to close in on Saturn.  Rusty Mars is in the eastern sky.  The bright moon is in the sky nearly all night.

by Jeffrey L. Hunt

Chicago, Illinois:  Sunrise, 7:06 a.m. CST; Sunset, 4:20 p.m. CST.  Check local sources for sunrise and sunset times for your location.

The Great Conjunction of 2020 is 13 days away! Bright Jupiter is low in the southwest after sunset.  Jupiter is 1.1° to the lower right of Saturn.  In the eastern sky, Mars Marches eastward in Pisces.

Bright Jupiter is in the southwest after sunset.  Saturn is 1.1° to the upper left of Jupiter.

To find the planet pair, start looking in the southern sky as night falls after sunset.  Jupiter is the brightest “star” in the area, about one-fourth of the way up in the sky.  Saturn is dimmer than Jupiter, but brighter than most of the other stars nearby.

Hold up your index finger.  At arm’s length, your finger fills the space between the two planets.

Look after sunset, during this season of early sunsets.  Jupiter sets nearly three hours after sunset.  An hour before sunset, it is already low in the southwest.

Farther eastward, Mars is the bright rusty star, over halfway up in the sky in the southeast.  It marches eastward among the stars of Pisces.

2020, December 8: One hour after sunset, Mars – in the southeast sky – is 1.4° to the lower left of (Epsilon Piscium) ε Psc, 1.2° to the upper right of Zeta Piscium (ζ Psc), and 1.9° to the upper left of 80 Piscium (80 Psc).

Read about Mars during December.

The planet is nicely placed with a triangle of stars – Epsilon Piscium (ε Psc on the chart), Zeta Piscium (ζ Psc) and 80 Piscium (80 Psc).  Use a binocular to spot the planet against the starry backdrop.

Use the binocular to watch Mars quickly move away from the small triangle during the next several evenings.  The planet is heading toward the region of dim Pi Piscium (π Psc). 

During early January 2021, Mars moves into Aries.  The star Hamal is the brightest star in the constellation.  The planets’ paths do not approach the star.  Mars passes nearly 9° to the lower left of the star on January 23.

For more about Mars during December, see this article.

Detailed note: One hour after sunset, bright Jupiter is 17° up in the southwest, 1.1° to the lower right of Saturn. Great Conjunction Countdown: 13 days.  Farther east, Mars is nearly halfway up in the sky in the southeast.  Mars is 1.4° to the lower left of ε Psc, 1.2° to the upper right of ζ Psc, and 1.9° to the upper left of 80 Psc. Use a binocular to spot the planet with the stars that make a small triangle.

For more about the Great Conjunction, read our feature article. This is the closest Jupiter – Saturn conjunction since 1623.

Here is more about the planets during December 2020.

2021, April 25: Mercury-Venus Conjunction, Mars, Bright Moon

April 25, 2021: Mercury passes Evening Star Venus this evening after sunset.  Look low in the western sky about 20 minutes after sunset.  Mars is marching eastward in Gemini, near the star cluster Messier 35.  The bright moon is near Spica.

2021, April 24: Evening Star, Bright Mercury, Venus, Mars, Gibbous Moon

April 24, 2021:  Brilliant Evening Star Venus and bright Mercury are entering the evening sky.  They are low in the west-northwest during evening twilight.  The bright moon is in the southeast in Virgo.  Mars moves into Gemini as it approaches the star cluster Messier 35.

2021, April 24: Lunar Occultation, Morning Planets, Jupiter Saturn

April 24, 2021:  The bright gibbous moon is near a star in Virgo during the early morning.  From parts of the Western Hemisphere, the moon covers the star.  Before sunrise, bright morning planets, Jupiter and Saturn are in the southeast before sunrise.

2021, April 23: Evening Star Venus, Mercury, Mars, Moon

April 23, 2021: Evening Star Venus and Mercury are entering the evening sky.  They are found very low in the west-northwest after sunset.  The bright moon is in the southeastern sky during the early evening.  Mars is moving toward the star cluster Messier 35.



Categories: Astronomy, Sky Watching

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