1、universestarsplanetsvastnessinfiniteness13.8 billion27.5 billion46 billion1. The universe is about _ years old.2. The observable universe is about _ light years across in diameter.3. Today the distant objects like stars that we can observe are a bit more than _ light years away.1. The universe is ab
2、out _ years old.2. The observable universe is about _ light years across in diameter.3. Today the distant objects like stars that we can observe are a bit more than _ light years away.13.8 billion27.5 billion46 billion93 billion13.8 billion46 billionWatch the rest of the video. Complete the table.Wa
3、tch the rest of the video. Complete the table.QuestionsQuestionsObservable UniverseObservable UniverseWhole UniverseWhole Universe1. How big is it?2. Is there an edge?3. Is there a centre?4. Is it getting bigger?The observable universe is about 93 billion light years across in diameter.Infinite. Yes
4、. Temporal edge.No.Yes. Earth/You.No.Yes.Yes.1) What is the Earth compared to? Is the comparison useful in understanding the infiniteness of the universe?2) What methods does the presenter use to enable viewers to understand this piece of knowledge in physics?The size of the Earth within the observa
5、ble universe is roughly equivalent to the size of a virus within the solar system. That does not help much, because we cannot really appreciate the incomprehensible smallness of a virus nor the bewildering bigness of our solar system either.The presenter provides comparisons that are relative to our knowledge.1.What have you learnt about the size of the universe?2.Find more information online and share with the class. Thank You
