Title Text:If you live in Los Angeles (around 33掳52’N, roughly the latitude of Hermosa Beach) the black hole in V404 Cygni passes over you each day. On Christmas Day it will be directly overhead around 2pm. Origin:https://xkcd.com/2849/ https://www.explainxkcd.com/wiki/index.php/2849:_Under_the_Stars 在星空下 如果你住在洛杉矶（大约33°52‘N，大约是赫莫萨海滩的纬度），天鹅座V404的黑洞每天都会从你头顶经过。圣诞节那天下午2点它会在你的正上方。…