Cosmic Background Isotrophy Measurements from the South Pole

这个宇宙学项目将测量宇宙的各向同性 微波背景辐射（CMBR），是早期发射的， 宇宙的形成。 测量将在 波长更长（约3毫米）和更短 (less即1毫米）。 因为这些无线电波会被 大气，特别是水蒸气，南极站，这是 地球上第二干燥的居住地是最好的地方 进行这些测量（苏联南极站东方号是 稍冷和干燥）。 此外，绕极运动 意味着天空中的任何一点都可以 透过恒定厚度的大气层观察 时间，这也是一个很大的优势。 迄今为止，所有对CMBR的测量都表明， 是各向同性的，也就是说，它来自各个方向， 强度。 很明显，这在很小的范围内是不可能的。 强度的变化，也不是在所有的角度尺度，任何超过 天空在可见光区均匀明亮的可能性 光 变化的数量，和角度尺度 变异是对创世理论的敏感测试 和宇宙的早期历史 这个项目是一个搜索 这些预期的变化。

This cosmology project will measure the isotropy of cosmic microwave background radiation (CMBR) that was emitted early in the formation of the universe. The measurements will be made at wavelengths both longer (approximately 3 millimeters) and shorter (less that 1 millimeter) than the peak in the CMBR spectrum. Because these radio waves are strongly absorbed by the atmosphere, especially water vapor, South Pole Station, which is the second driest inhabited place on Earth is the best place to make these measurements (the Soviet Antarctic Station Vostok is slightly colder and drier). In addition, the circumpolar motion of the celestial sky means that any spot in the sky can be watched through a constant thickness of atmosphere for any length of time, which is also a great advantage. To date all measurements of the CMBR have shown the radiation to be isotropic, that is, it comes from all directions with equal intensity. It is clear that this cannot be true at very small variations in intensity nor at all angular scales, any more than the likelihood that the sky would be uniformly bright in visible light. The amount of variation, and angular scale of those variations are sensitive tests of the theories of the creation and early history of the universe. This project is a search for these expected variations.