#太平洋电脑网#大西洋月刊:星际访客的冰冷秘密( 三 )
“Comets are absolutely excellent insulators,” said Karen Meech, one of ‘Oumuamua’s discoverers at the University of Hawaii, who was not involved in this new analysis.“They’re very fluffy and porous, like a down jacket.”
“彗星是非常好的绝缘体 , ” , 夏威夷大学中乌穆阿穆阿的发现者之一Karen Meech——他没有参与这项新的分析工作——说道 , “它们很蓬松 , 很多孔 , 就像一件羽绒服 。 ”
Scientists will likely never know for sure what lies inside ‘Oumuamua. When astronomers study the light reflected from the asteroid, they’re only examining the top few microns of its surface, a width smaller than that of a human red blood cell. “We can infer only so much about these little dots of light,” said Michele Bannister, an astronomer at Queen’s University Belfast and a coauthor on the new study.
科学家们可能永远也不会确切地知道乌穆阿穆阿内部是什么 。 当天文学家研究小行星上反射的光线时 , 他们只是检查到了其顶层几微米厚的范围 , 这比人类红细胞的宽度都要小 。 “我们可以推断出这些小点的光 , ”贝尔法斯特女王大学的天文学家、也是这项新研究的合著者Michele Bannister说道 。
Astronomers also have a finite amount of data to work with. Most of their ground-based telescope observations were carried out in the two weeks after ‘Oumuamua was discovered, when it was still visible enough to get good measurements. The majority of research on ‘Oumuamua—the attempts to explain its weird shape, its nonstop spinning, its unexpected hardiness—will come out of this data set.
天文学家可以处理的数据非常有限 。 他们的大部分地面望远镜观测工作都是在乌穆阿穆阿被发现后的两周内进行的 , 当时它仍然足够显眼 , 可以获得不错的测量数据 。 大多数关于乌穆阿穆阿的研究成果——它们试图解释它怪异的形状、它不停旋转的特征 , 它意想不到的硬度——都将从这个数据中产生 。
The rest may come from yet-to-be published observations by space telescopes like the Hubble, which has tracked ‘Oumuamua to help astronomers better understand its trajectory and where it came from. The asteroid is now about twice the distance between the Earth and the sun from our planet. Even to Hubble, the producer of countless, radiant images of distant stars and galaxies, ‘Oumuamua, a small object about 400 meters long, will look like a small point of light.
剩下的部分可能就要来自尚未公布的太空望远镜——如哈勃望远镜——的观测结果了 , 它追踪了乌穆阿穆阿 , 以帮助天文学家更好地了解它的轨迹和它的起源 。 这颗小行星现在与地球的距离是地球和太阳距离的两倍 。 即使是在拍摄了无数的遥远恒星和星系的辐射图像的哈勃望远镜看来 , 乌穆阿穆阿这个大约400米长的小物体看起来也就像是一个小光点 。
“It could be icy inside, and we’ll never know,” Meech said.
“里面可能存在冰体 , 但我们永远也不会知道 , ”Meech如此说道 。
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