Brilliant Venus and bright Mars shine from the morning sky. Mars – one day before its closest approach to Earth – shines in the sky nearly all night.
by Jeffrey L. Hunt
Brilliant Venus shines from the east before sunrise, while Mars is in the sky nearly all night.
Mars shines from high in the western sky at the time of the photo above. It is in the dim starfield of Pisces.
Mars is one day from its closest approach to Earth. At their closest, the planets are 38.6 million miles apart. They will not be this close again until 2035.
Earth passes Mars about every 26 months, but because of the Red Planet’s elliptical orbit, the closest separation grows until February 19, 2027, and then diminishes until September 11, 2035. Then the separation is 35.4 million miles.
Presently, Mars appears as an overly bright star. The Martian globe is only one-half the size of Earth. As it shines by reflected sunlight and its apparent size changes from the changing distance, its brightness varies widely depending on its distance from Earth and the sun.
Mars rises in the east during early evening hours. During the night it moves westward with the rotating Earth. By morning it is in the western sky.
In a week (October 13), Earth passes between the sun and Mars. The Red Planet is said to be at opposition with the sun, as they are in opposite directions in our sky.
Mars is retrograding – moving westward compared to the stars – in Pisces. This is an illusion as Earth passes the slower moving planets.
On the photo above, Mars is 0.5° to the upper left of Mu Piscium (μ Psc on the photo). During the next several mornings, the planet passes this star. Take a look at the starfield with Mars using a binocular as the planet passes the star and moves away from it.
Farther eastward, brilliant Venus shines from the stars of Leo. It continues to outshine all other “stars” in the night sky. This morning the planet is 2.9° to the lower left of the bright star Regulus and 3.6° above Rho Leonis (ρ Leo on the photo above). As with Mars, use a binocular to watch Venus move away from Regulus and toward ρ Leo during the next several mornings.
See our summary about Venus during October 2020 and the feature article about Venus as a Morning Star.
Watch Venus continue to move through Leo during most of October.
The moon is in the region with Venus and Regulus beginning October 12.
Read more about the planets during October.
2021, August 14: Waxing Moon, Stellar Double
August 14, 2021: This evening the waxing moon is near Zubenelgenubi, the southern claw, that is a stellar double. Use a binocular to see both stars that are in a gravitation dance.
2021, August 13: Evening Sky, Bright Planets
August 13, 2021: This evening the crescent moon appears between Evening Star Venus and Spica as the lunar slice dances eastward. Jupiter and Saturn are in the southeastern sky.
2021, August 12: Evening Sky, Lunar Dance
August 12, 2021: This evening the crescent moon appears between Venus and Spica as the lunar slice dances eastward.
2021, August 11: Waxing Moon, Evening Star
August 11, 2021: The waxing crescent moon is to the upper left of Evening Star Venus this evening in the western sky.
2021, August 10: Evening Star Venus, Crescent Moon
August 10, 2021: The crescent moon is near Venus in the western sky after sunset.
Categories: Astronomy, Sky Watching
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