The Galilean moons may sometimes cross the disc of Jupiter as viewed from the Earth in an event called a transit. This image of the moon Io transiting Jupiter was taken on August 8, 2021, from Bacoor, Cavite, using a 4-inch f/9 refracting telescope and an ASI 533 astronomy camera.
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Night Sky in Focus © Anthony Urbano | Bacoor, Philippines
Night Sky in Focus 