 Huge fireball lights up Russian skies 巨大的火球燃亮俄国天空 More than five years after a large space rock slammed into the atmosphere over Russia, shattering thousands of windows in the city of Chelyabinsk below, another meteor exploded in the sky over the country last week, lighting up the early morning sky. 一个巨大的太空岩石冲进了俄罗斯的大气层, 震碎了在其冲击区下面的车里雅宾斯克市数以千计的窗户。 时隔五年后, 另一颗流星在这个国家的天空上爆炸, 照亮了清晨的天空。 meteor [ˈmitiɚ, -ˌɔr] n.流星;大气现象 The fireball was captured on camera near the town of Lipetsk, between Moscow and the Ukrainian border. It glows bright for a second, leaving a trail of smoke that lingers for several minutes afterwards. 这个火球在莫斯科和乌克兰边境之间的利佩茨克镇附近被拍摄的。它明亮的闪烁了一秒钟, 然后留下了几分钟后才渐渐消失的一串烟雾。 The impact of the meteor with Earth's atmosphere was picked up by US government sensors used to detect nuclear explosions, among other things. NASA estimates the resulting explosion packed a punch of about 2.8 kilotons, which pales compared with the 440 kiloton blast over Chelyabinsk in 2013, but is the most explosive asteroid entry measured so far in 2018. 流星进入地球大气层的撞击被美国政府用来探测核爆炸和其它东西的传感器所发现。 美国宇航局估计, 由此产生的爆炸相当于大约2800吨TNT的爆炸力, 这与 2013年流星产生的44万吨TNT爆炸力比相形见绌, 但它是迄今为止在2018年测量到的最具爆炸性的小行星穿入。 asteroid [ˈæstəˌrɔɪd] n.[天]小行星;海盘车;海星 There have been no reports of damage from the blast, but some eyewitnesses reported hearing a loud sonic boom, according to the International Meteor Organization. It can also be seen in footage from a weather satellite upon close examination: 据国际流星组织报道, 他们没有收到爆炸造成的破坏的报告, 但一些目击者报告说，他们听到了超音速声爆的巨响。经密切观察，气象卫星也记录下了这个爆炸。 NASA estimates the meteor was moving at about 32,200 miles per hour (51,800 kilometers per hour) when it exploded about 16.7 miles (27 kilometers) above the surface of the planet. 美国宇航局估计, 当流星在地球表面上空大约16.7英里（27公里）爆炸 时, 它的穿越速度约为每小时32200英里 (每小时51800公里)。 Fireballs are a relatively regular occurrence, often coinciding with meteor showers. The Chelyabinsk fireball from 2013 was by far the most powerful such event recorded in the last 30 years, but an even more powerful impact is thought to have happened in Siberia in 1908. 这种火球是一种相对正常的现象, 经常与流星雨相伴出现。2013年的车里雅宾斯克的火球是迄今为止在过去30年中记录下的最强大的一次爆炸, 但据认为, 1908年在西伯利亚发生了一次更强大的爆炸。 So why always Russia? Actually, fireballs are seen around the world, but since Russia covers about an eighth of the globe's total land mass, it just makes mathematical sense they're more likely to be seen there. 那么这种事为什么总发生在俄罗斯？事实上, 在世界各地都能看到火球, 但由于俄罗斯覆盖了地球陆地总量的近八分之一, 从数学几率上来说就更有可能在俄国看到这种火球。 👇 |
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