China’s Tianwen-2 spacecraft chased Earth’s tiny quasi-moon for 400 days and 1 billion kilometres — but just as it returned the first close-up image, new evidence challenged the leading theory that Kamoʻoalewa is a fragment blasted from the Moon
China’s Tianwen-2 spacecraft has reached Kamoʻoalewa and returned the first close-range image of the small asteroid that keeps pace with Earth. The picture, taken from about 20 kilometres away on 2…
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