DART is an impactor that hosts no scientific payload other than a Sun sensor, a star tracker, and a 20 cm aperture camera (Didymos Reconnaissance and Asteroid Camera for Optical navigation - DRACO) to support autonomous navigation to impact the small asteroid's moon at its center. It is estimated that the impact of the 500 kg (1,100 lb) DART at 6.6 km/s (4.1 mi/s) will produce a velocity change on the order of 0.4 mm/s, which leads to a small change in trajectory of the asteroid system, but over time, it leads to a large shift of path. Overall, DART is expected to alter the speed of Dimorphos (Didymos B) orbit by about half a millimeter per second, resulting in an orbital period change of perhaps 10 minutes. Over a span of millions of kilometers, the cumulative trajectory change would turn a collision with a genuinely Earth-bound asteroid or comet into a safe outcome.

拿哥在直播唱歌！
https://www.youtube.com/watch?v=LcsSbOQEBrU

名称: Bookmarks
ID: alefragnani.bookmarks
说明: Mark lines and jump to them
版本: 13.0.4
发布者: Alessandro Fragnani
VS Marketplace 链接: https://marketplace.visualstudio.com/items?itemName=alefragnani.Bookmarks

Millions of electric cars are coming. What happens to all the dead batteries? (Score: 102+ in 3 hours)

Link: https://readhacker.news/s/4M5JU
Comments: https://readhacker.news/c/4M5JU

根据 CGTN 最新消息，“杂交水稻之父”、中国工程院院士、“共和国勋章”获得者袁隆平因病医治无效，于 2021 年北京时间 5 月 22 日上午在长沙逝世，享年 91 岁。

别吧，CGTN 别在这个事情上整一个还在抢救出来，那可就太.jpg

正经说，咱觉得麒麟才子这张图做广告也不怎么好，画风太阴间了（

？

如何看待乌合麒麟的与天猫合作“你好新生活”？ - 钟瀚的回答 - 知乎
https://www.zhihu.com/question/460680326/answer/1899186257

“这幅画引起“超乎作者原本创作意图的”广泛共鸣之处恐怕在于：

“真的有为数不少正在看这幅作品的人，仍然长久地生活在画面下方各层的状态之中。”