2020, September 5-6: Bright Mars, Moon

Moon and Mars, September 6, 2020
2020, September 6: In the morning sky, the moon is 2.3° to the upper left of Mars.


On the night of September 5/6, the gibbous moon appears to guide the bright planet Mars.

Moon and Mars, September 5, 2020
2020, September 5: The moon and Mars, (Composite of two images)

Update: Photo from September 5, 2020.

by Jeffrey L. Hunt

On the night of September 5 – September 6, the gibbous moon appears near Mars, a very bright planet in the southern sky before sunrise.  Currently, Mars is the fourth brightest “star” in the sky.  Only, the moon, Venus, and Jupiter are brighter.

As Earth approaches Mars, the Red Planet brightens – during the next six weeks – although it is not much larger in appearance to the human eye.  Even with a closest approach pending, the planet only resembles an overly bright star. While it can double in its apparent size through a telescope, the increase is imperceptible to the human eye (unlike what is shown in the social media memes.)

Mars in Pisces, September 5, 2020
2020, September 5: Mars is 9.6° to the upper left of the lunar orb. Among the stars of Pisces, the Red Planet is 2.2° to the upper left of Nu Piscium (ν Psc) and 2.6° to the lower left of Omicron Piscium (ο Psc).

On the evening of September 5 and morning of September 6, the bright gibbous moon is near the Red Planet.  Here’s what to look for on the night before and after the grouping:

  • September 5: One hour before sunrise, the bright gibbous moon is over 40° up in the southwest.  The moon is over 91% illuminated.  Mars is 9.6° to the upper left of the lunar orb.  The separation is about the distance across your fist at arm’s length.  In the evening, about three hours after sunset (10:15 p.m. CDT, in Chicago), the moon – about 86% illuminated – is to the lower right of Mars, about 0.8° away.  That’s about the distance across two fingertips at arm’s length. Find them in the east. On these evenings find bright Jupiter and Saturn – to Jupiter’s upper left – in the south-southwest sky.
Mars and Moon, September 6, 2020
2020, September 6: Mars and Moon. (Composite image)

Update: Photo from September 6, 2020.

  • September 6: One hour before sunrise, the moon is over halfway up in the southwest.  Mars is 2.3° to the lower right of the lunar orb.  Three hours after sunset in the eastern sky, bright Mars is over 11° to the upper right of the moon that is 79% illuminated.  The moon is near the eastern horizon. 
  • September 7: One hour before sunrise, the bright moon – 77% illuminated – is less than 60° in altitude in the south-southwest.  Mars is about 15° to the lower right of the moon. 

Each night, the moon is farther east of Mars and it begins to approach Venus in the east in the morning sky.  Look for the crescent moon and Venus on September 14.

Here is a daily summary about the planets during September.


2022, June 24: The waning crescent moon.

2022, July 26: Morning Venus, Crescent Moon, Evening Dragon

July 26, 2022: The crescent moon makes a spectacular artistic display with Venus before sunrise. Mars, Jupiter, and Saturn arc across the sky above Venus. Draco is in the north after twilight ends.

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Venus and crescent Moon, November 12, 2020

2022, July 25: Moon Nears Venus, Planet Parade Begins After Sundown

July 25, 2022: The thin crescent moon is nearly caught between the Bull’s horns before daybreak.  The four bright planets – Venus, Mars, Jupiter, and Saturn – nearly span the sky before daybreak.

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The moon, January 15, 2021

2022, July 24: Morning Crescent, Planet Parade

July 24, 2022: A thin crescent moon is in the eastern sky this morning, along with the planet parade that includes Venus, Mars, Jupiter, and Saturn.

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Categories: Astronomy, Sky Watching

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