使得这个天体（被称为SN 1979C）如此特别的事实在于多年以来它已经被一系列轨道上的X射线望远镜所观察研究，最近的观测是钱德拉X射线天文台所做的。
What makes this one -- dubbed SN 1979C -- special is that it has been observed over the years with a series of orbiting x-ray telescopes, most lately the Chandra X-Ray Observatory.
X -射线腕表系列有四个表盘颜色变化和两个表盘设计。
The X-Ray watch collection has four dial color variations and two dial designs.
另一种探明粒子性质的方法是观测两个WIMP的碰撞湮灭，此过程同时产生的一系列粒子和质子，产生伽马射线放射物。
Another way to probe the particles' properties is to look for the gamma-ray radiation produced when two WIMPs collide and annihilate each other, producing a cascade of particles and photons.
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