Nasa activated the 300-megapixel camera on the Nancy Grace Roman Space Telescope this weekend and the first test images are in. The results are out of focus—testing and calibration will take months—but delightful all the same, hailed as "green donuts." — Read the rest

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These photos show the stunning beauty of Saturn's north pole, which is shaped like a massive blue, swirling hexagon. This is definitely Saturn's fanciest detail. This six-sided jet stream pattern is called the Saturn Hexagon.

It is not a solid structure even though it looks like one from afar. — Read the rest

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