Astronomy

2020, November 15: Morning Planets Waltz, Evening Planets Dance

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2020, November 15: One hour before sunrise, Venus is 4.1° to the upper left of Spica. Mercury is 12.9° to the lower left of Venus

Five bright planets are visible during the nighttime hours.  Brilliant Morning Star Venus is “that bright star” in the southeastern sky before sunrise.  Venus waltzes near the star Spica leading up to its widely-spaced conjunction with the star. Mercury puts on its best morning display of the year to the lower left of Venus.  During the evening in the south-southwest, Jupiter slowly dances toward Saturn as a lead-up to the December 21, 2020 Great Conjunction.  Mars slowly dances eastward in Pisces in the eastern sky.

by Jeffrey L. Hunt

Chicago, Illinois:  Sunrise, 6:41 a.m. CST; Sunset, 4:30 p.m. CST.  Check local sources for sunrise and sunset times for your location.

Morning: Brilliant Venus is low in the east-southeast as morning twilight brightens toward the approaching sunrise.  The planet is passing the star Spica.  This morning the planet is 4.1° to the star’s upper left. Tomorrow morning, Venus appears closest to the star.

 Meanwhile, Mercury is very low in the sky, nearly 13° to the lower left of Venus.  It is bright, but likely hiding behind a nearby house or building.  Find a clear horizon to see it.  By about 45 minutes before sunrise it is about 8° up above the east-southeast horizon.  A binocular may help you to first locate it, and then spot it without the binocular’s optical assistance.

Morning detailed note: One hour before sunrise, Venus – over 17° up in the east-southeast – is 4.1° to the upper left of Spica.  Mercury (−0.7) is 12.9° to the lower left of Venus. As the sky brightens further as sunrise approaches, find the speedy planet about 8° up in the east-southeast. Through a telescope, Venus is 12.4” across and 85% illuminated, a morning gibbous phase. 

See our summary about Venus during November 2020 and the feature article  about Venus as a Morning Star.

2020, November 15: In the south-southwest, Saturn is 3.7° to Jupiter’s upper left. Jupiter is 2.6° to the lower right of 56 Sagittarii (56 Sgr), while Saturn is 2.6° to the star’s lower left.

Evening: During the early evening bright Jupiter and Saturn are in the south-southwest.  Saturn is 3.7° to Jupiter’s upper left.  Jupiter slowly dances toward Saturn for their once-in-a-generation Great Conjunction on December 21, 2020.  Observe their slow-motion dance compared to the stars.  This evening, Jupiter is 2.6° to the lower right of 56 Sagittarii (56 Sgr on the chart), while Saturn is 2.6° to the star’s lower left. 

Without a binocular, make an observation each night to notice that the gap between the two planets is closing.

2020, November 15: Mars is 3.1° to the lower right of Epsilon Piscium (ε Psc) and 3.0° below Delta Piscium (δ Psc).

Farther east, Mars is the rusty star that is about one-third of the way up in the sky in the east-southeast.  It is slowly moving eastward among the stars of Pisces.  Mars started moving eastward again after it finished its retrograde a few days ago.  With a binocular notice that it is 3.0° below Delta Piscium (δ Psc on the chart) and 3.1° to the lower right of ε Psc.  With a binocular notice the small triangle made by ε Psc, Zeta Piscium (ζ Psc) and 80 Piscium (80 Psc).  The Red Planet approaches and moves through the triangle during the next few weeks.

For more about Mars during November, see this article.

Evening detailed note: Forty-five minutes after sunset, can you find Arcturus low in the west-northwest? The star is at its heliacal setting, last appearance to the unaided eye.  It is already appearing in the morning sky. Next month it sets at sunset. In the evening, Jupiter is over 22° up in the south-southwest about one hour after sunset. Saturn is 3.7° to the upper left of bright Jupiter.  Among the stars, Jupiter is 2.6° to the lower right of 56 Sgr, while Saturn is 2.6° to the star’s lower left. Mars (m = −1.6) is 82.0° of ecliptic longitude east of Jupiter. The gap slowly widens as Mars picks up its eastward pace. The Red Planet is nearly 30° up in the east-southeast, 3.1° to the lower right of ε Psc and 3.0° below δ Psc.

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

Read more about the planets during November.

2020, December 7: Moon in Leo, Morning Star Venus, Jupiter Nears Saturn

In the morning before sunrise, the slightly gibbous moon is in Leo, between Regulus and Denebola. Brilliant Morning Star Venus is low in the southeast, stepping eastward in Virgo. With the Great Conjunction in two weeks, Jupiter is near Saturn in the southwest after sunset. Mars marches eastward among the stars of Pisces.

2020, December 6: Morning Star Venus, Gibbous Moon, Jupiter, Saturn, Mars

As morning twilight is in progress, the moon is high in the southwest among the stars of Leo. It is near the “Sickle of Leo. At the same hour Morning Star Venus is dancing eastward in Libran near Zubenelgenubi. In the evening Mars is in the southeast, marching eastward in Pisces. In the southwest, Jupiter approaches Saturn as a prelude to the Great Conjunction in 15 days.

2020, December 5: Morning Star Venus, Gibbous Moon, Evening Planets

During morning twilight brilliant Morning Star Venus shines from low in the east-southeast before sunrise as it steps eastward in front of the stars of Virgo. The gibbous moon lies in front of the stars of Cancer, between Leo and Gemini. In the evening sky. Jupiter continues to dance toward Saturn in a prelude to the Great Conjunction on December 21, 2020. In the east-southeast, Mars marches eastward among the dim stars of Pisces.

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