Webb nails down asteroid YR4's near-miss with the Moon

TL;DR Summary
JWST observations show asteroid 2024 YR4 will pass about 14,229 miles (22,900 km) from the Moon, with a margin of error of ±497 miles, effectively ruling out a lunar impact and easing previous fears of a Moon collision; the measurements also demonstrate Webb’s growing role in planetary defense by tracking a tiny, fast-moving asteroid and refining its orbit for future risk assessment.
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