How big is the universe - and does it have a boundary? Distances on the astronomer's scale are very hard to appreciate. Patrick Moore and Dr Ron Maddison discuss them in this programme, and explain how to describe them in everyday terms.
How big is the universe - and does it have a boundary? Distances on the astronomer's scale are very hard to appreciate. Patrick Moore and Dr Ron Maddison discuss them in this programme, and explain how to describe them in everyday terms.