Didymos and Dimorphos have a 770-day orbital period around the sun, which lead author Rahil Makadia said has been changed by "about 11.7 microns per second, or 1.7 inches per hour." That might not sound like much, but according to Makadia, “Over time, such a small change in an asteroid’s motion can make the difference between a hazardous object hitting or missing our planet.”
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据界面新闻消息,来自西安的向律师春节期间使用腾讯元宝 App 生成拜年海报时,竟收到含辱骂文字的图片。
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这一概念的提出,源于耕地保护面临的新挑战。