A NASA probe photographed something in front of Jupiter’s Great Red Spot

A NASA probe photographed something in front of Jupiter’s Great Red Spot
A NASA probe photographed something in front of Jupiter’s Great Red Spot

On March 7, the mission JunoJuno of the NASANASA flew over JupiterJupiter up close for the 59e times. It sent researchers new and precious images of stormsstorms which swirl in theatmosphereatmosphere of the gas giant planet. Including its famous Great Red Spot. And surprise! On one of them, treated by a astronomerastronomer amateur, Gerald Eichstädt, a mysterious black spot appears.

A tiny moon on a giant planet

Mysterious, he didn’t stay that way for long. Because researchers quickly identified it as corresponding to Amalthée, a small moonmoon of Jupiter. It has the shape of a potatopotato of no more than 250 over 130 kilometers. However, it is the fifth largest of the 95 known moons of the giant planet. Here it is seen more than 180,000 kilometers from the summit of cloudsclouds of Jupiter and against the background of a Large red spotLarge red spot of 12,500 kilometers (almost the size of the Earth).

Note that Amalthea is the reddest object in our Solar System. Observations even indicate that this moon gives off more heatheat that she does not receive any SunSun. Perhaps the result of electric currentselectric currents induced in its core by the powerful magnetic fieldmagnetic field of Jupiter. Or else, constraints of tidetide caused by the gravitygravity of the giant planetgiant planet Close.

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