Not even sure I can express this properly. Here goes:
The universe is expanding. It is expanding at an ever increasing rate.
Suppose it isn't. Suppose everything within the universe is actually getting smaller so 1 metre 5 billion years ago was much larger than it is today (relative to some point outside the universe that is - within the universe it would appear constant).
Question - how would we know? Rather, how could we tell the difference?
The universe is expanding. It is expanding at an ever increasing rate.
Suppose it isn't. Suppose everything within the universe is actually getting smaller so 1 metre 5 billion years ago was much larger than it is today (relative to some point outside the universe that is - within the universe it would appear constant).
Question - how would we know? Rather, how could we tell the difference?
Kuusi palaa, ja on viimeinen kerta kun annan vaimoni laittaa jouluvalot!
