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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

Earth Moon, in crescent phase, is seen just above the image center. Directly below is a bright spot surrounded by four other spots, all in a row, which are all moons of Jupiter. Please see the explanation for more detailed information.Earth Moon, in crescent phase, is seen just above the image center. Directly below is a bright spot surrounded by four other spots, all in a row, which are all moons of Jupiter. Please see the explanation for more detailed information.

Moon Meets Jupiter

Explanation: What's that below the Moon? Jupiter -- and its largest moons. Many skygazers across planet Earth enjoyed the close conjunction of Earth's Moon passing nearly in front of Jupiter in mid-June. The featured image is a single exposure of the event taken from Morón de la Frontera , Spain . The sunlit lunar crescent on the left is overexposed, while the Moon's night side, on the right, is only faintly illuminated by Earthshine . Lined up diagonally below the Moon, left to right, are Jupiter's bright Galilean satellites: Callisto , Ganymede , Io (hard to see as it is very near to Jupiter), and Europa . In fact , Callisto, Ganymede, and Io are larger than Earth's Moon, while Europa is only slightly smaller. NASA's robotic spacecraft Juno is currently orbiting Jupiter and made a close pass near Io only a week ago. If you look up in the night sky tonight , you will again see two of the brightest objects angularly close together -- because tonight is another Moon-Jupiter conjunction .

Date August 8, 2023
Credit Credit & Copyright: Jordi L. Coy
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.