139 new minor planets found thanks to a new technique that could reveal thousands more objects in the outer solar system. The new method may help astronomers prove (or disprove) the existence of Planet Nine, a world 5-15 times the mass of Earth that orbits about a dozen times farther out than Pluto.

139 new minor planets found thanks to a new technique that could reveal thousands more objects in the outer solar system. The new method may help astronomers prove (or disprove) the existence of Planet Nine, a world 5-15 times the mass of Earth that orbits about a dozen times farther out than Pluto.

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