All That Is Hot新闻微阅读三篇

1 An asteroid will hit Earth

一颗小行星将撞击地球

If all goes according to plan， scientists will hit Earth withpart of an asteroid. That is less alarming than it sounds， for thechunk of rock in question weighs at most a few hundred grams.It will arrive in a small capsule［太空舱］， complete with parachute，that will drift gently to the ground in the Utah desert. Therock is from an asteroid named Bennu， which was visitedin 2018 by an American spacecraft called OSIRIS-REx.The probe will drop its cargo off enroute to anotherasteroid， Apophis， at which it is due to arrive in2029. Astronomers take a great interest inasteroids. The solar system was formedaround 4.5 billion years ago， whena cloud of dust and gas collapsedunder its own gravityinto a disc， which in turnagglomerated［凝聚］ into the sun and itsplanets. Asteroids are leftover［剩余的］ chunksthat never accrued enough mass to becomeplanets. Studying them thus offers a window intothe ancient astronomical past. This will not be the firsttime that bits of asteroids have been brought to Earth.In 2010 Hayabusa， a Japanese spacecraft， visited anasteroid called Itokawa and returned with less than amilligram of it. Its successor， Hayabusa2， was able toprocure five grams of rock from an asteroid namedRyugu in 2020. OSIRIS-REx’s dig did not go quiteaccording to plan. Some of the excavated materialis thought to have jammed its digger， allowingsome of the sample to fall back out. But NationalAeronautics and Space Admiristraion（NASA）is confident that the mission has exceededits minimum target of 60 grams.Compared with previousmissions， that will be abounty.

如果一切按计划进行，科学家们将用一颗小行星的一部分撞击地球。（剩余3768字）