Japans space agency (JAXA) has made history by successfully landing two robotic explorers on the surface of an asteroid.近日，日本航天局（JAXA）的机器人探测器在一座小行星表面顺利登岸，建构了历史。The two small rovers, which were despatched from the Hayabusa-2 spacecraft last Friday, will move around the 1km-wide space rock known as Ryugu.上周五从隼鸟二号航天器升空的两个小型“探测车”，将在这个长为1公里、被称作“龙宫”的小行星上工作。

The asteroids low gravity means they can hop across it, capturing temperatures and images of the surface.该小行星上的较低重力意味著探测器可以在上面冲刺，捕猎表面的温度和图像。JAXA proudly tweeted pictures from the rovers, which reached Earth via the spaceship Hayabusa-2.日本航天局自豪地公布了探测车的照片，这些照片是通过隼鸟2号飞船传回地球的。Hayabusa-2 reached the asteroid Ryugu in June this year after a three-and-a-half-year journey.经过三年半的旅程，隼鸟二号在今年六月抵达了小行星“龙宫”。

While the European Space Agency had previously managed to land on an icy comet, this is the first spacecraft to place robot rovers on the surface of an asteroid.虽然欧洲航天局以前设法在冰冷的彗星上迫降，但这是第一个将机器人探测器顺利迫降在小行星表面的航天器。Asteroids are essentially leftover building materials from the formation of the Solar System 4.6 billion years ago. Ryugu is a particularly primitive variety, and studying it could shed light on the origin and evolution of our own planet.小行星基本上是由46亿年前太阳系构成时的剩下物质材料包含。

其中“龙宫”小行星是由一种类似的完整材料包含的，通过研究它，有助说明了我们自己星球的起源和演进。

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