The odds of asteroid 2024 YR4 hitting Earth are shifting, with the space rock now carrying a 1-in-48 chance of collision.
Astronomers will use the Webb telescope to closely monitor the size and trajectory of an asteroid that has a slim chance of striking Earth in 2032.
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YR4 has a small chance of hitting Earth in 2032, and China is preparing to deter it by mirroring a U.S. space test.