A | MEXICO CITY -- Five men were killed in a fight between inmates at a prison in Mexico’s Gulf coast state of Tabasco, authorities said Friday.Four of the five inmates killed in the riot late Thursday were on trial or serving sentences for rape, homicide or other violent crimes, the state police department said. Police said control of the prison had been regained, and that nobody else had been injured or escaped. About 16 prisoners were detained in relation with the killings. The police department blamed a “fight between groups” from different cell blocks. But photos and videos apparently made by inmates and posted on social media suggested the dead men may have been killed in retaliation for extorting money from fellow inmates.If confirmed, it would not be the first time that prisons in Mexico have erupted in violence for similar reasons. Inmates who are apparently connected to gangs with members on the outside routinely try to demand protection payments from prisoners. The gangs threaten prisoners or their families with violence to enforce payment demands.In 2022, 56 inmates were injured in a mass brawl at the Apodaca prison, just outside the northern city of Monterrey, which involved complaints that some prisoners were trying to extort money from others.It is part of a broader problem in Mexico in which people still on trial are often held in the same prisons with convicted inmates. Moreover, the poor supervision of many Mexican prisons often allow inmates to essentially control parts of the facilities.。当彗星碎屑与我们的大气层相撞时，它们在转瞬即逝的瞬间燃烧起来，产生流星穿过天空。较大的或移动较慢的碎片可以燃烧成更大、更亮的火球。2022年的猎户座流星群将在美国东部时间10月20日（周四）晚上到第二天早上达到高峰。

B | 美国流星协会预测，在理想的条件下，天空观察者每小时可以捕捉到15到20颗流星，但有时流星雨的爆发会让人惊讶，是这个数字的三倍。美国流星协会的Bob Lunsford在为AMS撰写的一篇博文中解释说：“看到这些流星的最佳时间是在凌晨1点到黎明（当地时间）。在活动最频繁的时候，这些流星的源头就在猎户座的微弱‘俱乐部’的东边。这个位置也位于被称为参宿四（猎户座α）的明亮橙色恒星的东北方向约10度。10度相当于一个人手臂伸直时的拳头。”如果你出去寻找猎户座流星雨，你可以尝试遵循Lunsford的提示，或者通过使用Stellarium等应用程序定位猎户座来走捷径。把星座放在你视野的中心，将有助于最大限度地体验，但任何对夜空有适当的宽阔视野的人都会有很好的机会捕捉到这些流星。今年是一个高于平均水平的年份，可以在高峰夜发现猎户座流星雨，这是因为月亮在猎户座的另一侧天空中是一个相当暗的新月。这意味着它不会像更亮的时候那样影响很多微弱的流星，但是你总是可以通过把微弱的月亮放在你的背后或者尽可能远离你的视线中心来最大化你的情况。作为奖励，猎户座流星群并不是本周唯一活跃的流星雨。持续时间长的金牛座流星雨和一些小的流星雨也可能每小时贡献几颗流星。金牛座流星雨的移动速度明显较慢，这意味着它们可以产生更多明亮的火球。所有这些加起来就是一年中最适合欣赏天空中小火的夜晚之一。