NASA’s Spitzer Space Telescope has found evidence of a high-speed collision between two burgeoning planets around a young star. Astronomers say that two rocky bodies, one as least as big as our moon ...
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The formation of Mercury remains an unsolved mystery. The planet closest to the sun has a disproportionately large metallic core—accounting for about 70% of its mass—and a relatively small rocky ...
Scientists have shown that Earth’s basic chemistry solidified within just three million years of the Solar System’s formation. Initially, the planet was barren and inhospitable, missing water and ...
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