Ambushed by the coronavirus, 15.5 billion km ago.
10 year old: So the earth moves around the sun and we move with it?
Dad: Yes.
10 year old: And in one hour we have moved 107,000 km along with the earth?
Dad: Yes.
10 year old: And the sun moves around the centre of the galaxy?
Dad: Yes, the sun and the entire solar system orbit the centre of the Milky Way Galaxy.
10 year old: And in one hour the sun has moved 828,000 km?
Dad: Yes.
10 year old: So in one hour I have travelled 935,000 km around the galaxy?
Dad: Yes.
10 year old: And does the galaxy move?
Dad: Yes, It is thought that the galaxy moves 2,160,000 km relative to other galaxies in an hour.
10 year old: So where did the coronavirus come from?
Dad: We don’t know.
10 year old: And it came in November last year?
Dad: Yes.
10 year old: And we have travelled 15.5 billion km since last November?
Dad: Aaaah, Yes. About that.
10 year old: So we could have been ambushed by coronaviruses lying in wait for us there?
Dad: No.
10 year old: But you don’t know where it comes from.
Dad: We don’t know where it came from, but we know it didn’t come from space.
10 year old: So you do know what you don’t know.
