The Trio of Venus, Mars and Regulus
Venus is the brightest point of light in the night sky. In early July, it sets in the west less than two hours after sunset. When you watch the fading colors of the sunset, the first light you see is Venus. The closest planet to Earth shines at magnitude -4.7 during the first half of the month. On July 9, 2023, if you wait until the sky darkens further, you will see two points of light together and above brilliant Venus. Regulus, the brightest star in Leo the Lion, is a slightly brighter and whiter light. And next to it is red Mars. These two worlds will appear slightly more than the width of the Moon on both July 9th and 10th.
View through the telescope
To get a good look at these three, try focusing on them with a pair of binoculars. With binoculars, you can see the crescent phase of Venus. Next, look at the white and red dots of light together in one glance. These are Regulus and Mars respectively.
Mars is supposed to be a steady light, but Regulus is twinkling. Because Mars is close to Earth. A star — like Regulus — is so far away, nothing more than a pinprick of light in our sky. So the pulsating atmosphere of the Earth we observe would cause Regulus to bounce around the point, while disk-like Mars would remain stationary.
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Bottom line: On July 9th and 10th you’ll get a close look at Venus, Mars and Regulus. Use binoculars to look at faint objects slightly larger than the width of the Moon.
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For more night sky events visit Earthsky’s Visible Planets and Night Sky Guide.
Also Read: Venus bright in evening sky in 2023