科学家们利用美国宇航局可回收的“深度撞击”彗星探测器的母船，来观测地球、月球和火星的反射光。
Scientists used the mothership of NASA's recycled Deep Impact comet probe to look at light reflected off Earth, the moon and Mars.
两者都是强子对撞机，这种机器能让光子以略低于光的速度相互撞击或撞向它的反物质近亲，像散弹一样产生大量的其它粒子。
Both are hadron colliders: machines that smash protons into each other, or into their antimatter kin, at a smidgen below the speed of light in order to create shrapnel in the form of other particles.
像素仅仅是反映有多少光撞击到感受器特定部位的数字。
A pixel is merely a number reflecting how much light has hit a particular part of a sensor.
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