宇宙是什麼？What is the Universe?

宇宙是什麼？

宇宙，是一個包含所有物質、能量、時間和空間的整體。根據「大霹靂理論」（Big Bang Theory），宇宙在大約138億年前誕生，並持續膨脹到現在。宇宙中充滿了恆星、行星、星系、星雲、黑洞與無數神秘現象。

宇宙有多大？

目前我們能觀測到的宇宙直徑超過930億光年！而這只是「可見宇宙」的範圍。宇宙的邊界在哪裡？我們還不知道。

What is the universe?

The universe includes all matter, energy, time, and space. According to the Big Bang Theory, the universe was born about 13.8 billion years ago and has been expanding ever since. It is filled with stars, planets, galaxies, nebulas, black holes, and countless mysterious phenomena.

How big is the universe?

The observable universe is more than 93 billion light-years across. However, this is only what we can currently observe. What lies beyond? We still don’t know.