- #1
SUDOnym
- 90
- 1
Hi there
Am to teach a lesson on stars and galaxies to my year 7 class on Monday...
Want to brush up on a few things... so would be grateful for answers to these questions:
1.Is the current thinking that the universe is infinite or finite? (I thought the consensus was that it was finite but I am not entirely sure if thinking hasn't changed... )
2.when we say the "observable universe" does this refer to a universe that is 13.8 billion light years in size? ie. the Planck telescope could view back as far as when the universe became opaque which was 13.8 billion years ago...
3. When we say that there are about 100 billion galaxies in the universe, does this refer to observable universe?
Thanks
Am to teach a lesson on stars and galaxies to my year 7 class on Monday...
Want to brush up on a few things... so would be grateful for answers to these questions:
1.Is the current thinking that the universe is infinite or finite? (I thought the consensus was that it was finite but I am not entirely sure if thinking hasn't changed... )
2.when we say the "observable universe" does this refer to a universe that is 13.8 billion light years in size? ie. the Planck telescope could view back as far as when the universe became opaque which was 13.8 billion years ago...
3. When we say that there are about 100 billion galaxies in the universe, does this refer to observable universe?
Thanks