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How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...
NASA's James Webb Space Telescope detection of TWA 7b represents a major milestone: the lightest exoplanet discovered with a direct image.
Despite being covered in impact craters that could potentially send pieces of the planet into space, we have never found a piece of Mercury. Until, just maybe, now.