平坦宇宙(Flat universe):宇宙所拥有的物质足以使其膨胀速度减缓,但又不发生坍缩。
如果密度正好等于临界密度,宇宙则是平坦的,但很可能仍然是无限的。
If the density just equals the critical density, the universe is flat, but still presumably infinite.
如果宇宙是“平坦”的,光束就会永远保持平行。
If the universe is "flat", the beams will always remain parallel.
修克说,天文学家们对宇宙是平坦的观点的置信程度必须达到99.9999%,只有这样,才能无论从哪种假设开始研究都能得出令人信服的结论。
Silk says astronomers need to achieve a 99.9999 per cent level of confidence on the flat universe, high enough that the case startsto look compelling no matter what the starting assumptions are.
应用推荐