theyre difficult to see. But they do give off infrared radiation, so an infrared telescope like WISE will
看到他们很困难。但他们却释放出红外线,所以,象WISE这样的红外线望远镜
be able to produce images of them. During its mission WISE will take pictures of
才能够捕捉到它们的图像。
hundreds of thousands of asteroids.
WISE的任务就是拍摄成千上万的小行星图像。
Brown dwarfs8 are another kind of deep-space object that will show up in WISEs pictures.
WISE的另一任务是为另外一种太空深处的天体一褐矮星拍照。这种天体是
These objects arefailed stars 一which means they are not massive enough to jump start9 the
失败的恒星,它们是一些不够大,不能像太阳的能量那样启动相同的反应。褐
same kind of reactions that power stars such as the sun. Instead,brown dwarfs simply shrink and
矮星只能缩小和冷却。
cool down. Theyre so dim that theyre almost impossible to see with visible light, but in the
他们发出的光如此之微弱,人们根本看不到,但是在红外
infrared spe ctrum they glow.
频谱中,它们是发光的。
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