- The Universe was born by an explosion called the Big Bang.
- It was occurred about 13.7 billion years ago, according to the analysis of cosmic microwave background radiation (CMBR) which sent out soon after the universe was born.
The universe in early stage is thought to have been a red-hot and high-density dot.
The dot began to expand as if it had blown up.
If we think of the end of the universe as the furthest point we can see, it is 13.7 billion light years away now and it is still extending.
When we think of the end of universe as the limit of space, not the furthest point we can see, we can not find yet whether there is an end to it or not.
宇宙は、137億年前、ビッグバンによって生まれたとされる。
小さな一点だった宇宙は爆発しているかのように急膨張を続けている。
その時に発せられた光が今地球に届いているので、現在わかっている宇宙の果ては、137億光年の距離ということになるが、その先に宇宙が存在するのかどうかはわかっていない。
- 素朴な「？」がよくわかる！英語対訳で読む科学の疑問
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- 楽天