final

Water Arrived in the Final Stages of Earth’s Formation

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Roughly 4.6 billion years ago, the Sun was born from the gas and dust of a nebula that underwent gravitational collapse. The remaining gas and dust settled into a protoplanetary disk that slowly accreted to form the planets, including Earth. About 4.5 billion years ago, our planet was impacted by a Mars-sized body (Theia), which … Read more

JPL completes investigation of Ingenuity’s final flight

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WASHINGTON — NASA’s Ingenuity Mars helicopter crashed early this year when its navigation system was confused by the featureless terrain it was flying over, project engineers concluded. Leaders of the Ingenuity Mars helicopter project at the Jet Propulsion Laboratory briefed the results of what they have dubbed the “first aircraft accident investigation on another world” … Read more