Hubble does it again! A Jupiter triple-moon conjunction – COSMIC TRIBUNE
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Hubble does it again! A Jupiter triple-moon conjunction

[CLICK ON IMAGE FOR HIGH RESOLUTION: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)]

JupiterMoonsShadowsOur solar system’s ruling giant planet Jupiter and 3 of its 4 large Galilean moons are captured in this single Hubble snapshot from Jan. 24. Crossing in front of Jupiter’s banded cloud tops Europa, Callisto, and Io are framed from lower left to upper right in a rare triple-moon conjunction.

Distinguishable by colors alone icy Europa is almost white, Callisto’s ancient cratered surface looks dark brown, and volcanic Io appears yellowish. … Remarkably, two small, inner Jovian moons, Amalthea and Thebe, along with their shadows, can also be found in the sharp Hubble view.

The Galilean moons have diameters of 3,000 to 5,000 kilometers or so, comparable in size to Earth’s moon. But odd-shaped Amalthea and Thebe are only about 260 and 100 kilometers across respectively.

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