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Which planet is closest to the sun?
Mercury takes only 88 Earth days to orbit the sun.
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Most detailed survey of particles around the sun reveals new mysteries
More than a decade of data about the particles zipping around our sun can solve mysteries from the behaviour of individual ...
The sun’s poles are about to flip. It’s awesome — and slightly terrifying.
So “the ability to predict and preserve astronauts on Mars is a direct result of our capabilities to observe all the sun,” ...