- Huge asteroid zipping by Earth has its own moon - According to Arecibo, the larger asteroid could be 420 meters (1,378 feet) in diameter, bigger than the Great Pyramid of Giza. The "moon" satellite is estimated to be around 180 meters (591 feet) wide. https://www.cnet.com/au/news/huge-asteroid-zipping-by-earth-has-its-own-moon/ 34 comments space
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