Asteroid sharing Earth’s orbit discovered. Could it help future space missions?

500 years of 2020 XL5 orbits plotted, relative to Earth. Credit: Phoenix7777 – Own workData source: HORIZONS System, JPL, NASA CC BY-SA 4.0

Research has shown that the Earth trails an asteroid barely a kilometer across in its orbit about the Sun—only the second such body to have ever been…

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