The National Interest on MSN14d
As Space War Looms, Europe Prepares to Defend Its Galileo Satellites
Since the start of the Ukraine conflict, there have been periodic disruptions of Europe’s Galileo GPS network—attacks that ...
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The small moons of Jupiter
Saturn, Jupiter’s outer neighbour, currently has 83 known satellites. The four larger moons mentioned above, also known as the 'Galilean moons', account for 99.997 percent of the total mass of Jupiter ...
On this date: Galileo discovers three major moons of Jupiter
Galileo Galilei, with a homemade telescope, noticed three points of light near Jupiter. Initially believing they were distant stars, Galileo’s repeated observations over several nights and realized ...
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Jupiter's moon Callisto is very likely an ocean world
More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however ...