Re:There Probably Have Been Aliens
by Nadya on Monday January 23, 2017 @01:29PM
(#13464516)
Did you mean universe? Our galaxy is a spec of dust. Our local galaxy cluster is also just a spec of dust. For how large the universe is - even a supercluster is a spec of dust. The universe is mind boggingly massive.
The observable universe has an estimated diameter of 93 billion light-years. A few million years might be enough to explore nearby galaxies. For example, to explore just our Local Supercluster you would need approximately 65,000,000 years [0]. Travelling at the speed of light.
E:
Virgo is further than Ursa Major. Updated 55,000,000-->65,000,000.
The observable universe has an estimated diameter of 93 billion light-years. A few million years might be enough to explore nearby galaxies. For example, to explore just our Local Supercluster you would need approximately 65,000,000 years [0]. Travelling at the speed of light.
E: Virgo is further than Ursa Major. Updated 55,000,000-->65,000,000.
E2: I always refer people to this video in regards to aliens, space, and time. I forgot to in this post, so here it is now: https://www.youtube.com/watch?v=HPl10L40pBM
[0] https://upload.wikimedia.org/wikipedia/commons/e/e2/Local_su...