That "city-killer" asteroid may no longer be projected to strike Earth in the near future, but scientists are still keeping close tabs on it. Using the mighty James Webb Space Telescope, astronomers have imaged the once-daunting space rock, 2024 YR4, in infrared light, providing our best estimate yet of its true size. It's also a convincing demonstration of the telescope's usefulness in assessing the hazards of near-Earth asteroids in the future. Previously, our ground-based glances at 2024 YR4 in visible light suggest that it could be as long as nearly 300 feet. Now, the latest observations reveal that it's somewhat […]

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https://futurism.com/james-webb-stares-asteroid