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Skywatchers who got up early Monday, September 16, 2025, and have a clear sky will see a combination of a beautiful crescent and Jupiter, with two bright stars very close. Castor and Pollux, two bright stars relatively close to the sun, are known as the twins of Constellation Gemini.
Tuesday, September 16: A ‘diamond’ in the sky
Stellarium / Canva / Jamie Carter
Basic events
The four objects will examine the best of about 90 minutes before Sunrise throughout North America On the morning of Monday, September 16th 2025. Look low in the East before dawn.
A moon moon, about 28%, will only look spectacular by Jupiter, either with the naked eye or via binoculars.
Just to the left of the moon will be the Castor stars (above) and Pollux (below), with the four forming a flattened diamond shape as shown by North America.
From Europe, the moon will be a little higher in heaven, creating a more intense diamond shape.
Each of the four objects – the moon, Zeus, Castor and Pollux – seems to be about four degrees. This is the width of the three fingers held in length.
Jupiter’s moons can see through binoculars. (Photo by Jamie Cooper/SSPL/Getty Images)
SSPL through getty images
The moon of the earth and the moon of Jupiter
All four objects will be visible to the naked eye, but they will also fit into the vision of the binoculars. Crescent Moon is a spectacular object in binoculars, with the goalkeeper – the dividing line between day and night on the moon, – where to look for shadows and craters. It is also worth showing any pair of binoculars in Zeus to see his biggest moons, GanyMede, Europa, Callisto and IO. These four moons can be easily regarded as light spots.
The stars of the twin
This mating of the moon and Zeus makes for a magnificent spectacle, but the close presence of the famous twin stars of Gemini will make this an even more beautiful panorama. At the bottom left of the moon, the orange Pollux-just 34 light-years from the solar system-will act as a corner of the diamond. Just above it, on the upper left left of the moon, there is yellowish castor oil, which is about 51 light years away. Bigs can provide a more intense view of contrasting the color between Castor and Pollux.
