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宇宙微波背景辐射的反常现象
开始让我们先聊一下什么是宇宙微波背景辐射。基于我们目前对宇宙的认知,宇宙在早期的时候处在高温高密的一种状态,所有的粒子都处在热平衡当中。当宇宙逐渐冷却,光子开始从与电子的碰撞平衡中解耦出来自由传播。而光子在整个自由传播的过程中一直保持着黑体谱的形式, ...
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Venezuela frees 6 Americans
Opens probe into NPR, PBS
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