Okay, then, what about the skin of a sphere, where the radius is 13.8 light years. Why would any matter be left behind if everything zooming out of the Big Bang spot shot out into a vacuum? Again, wrong!
- a sphere, but because it is expanding, the radius is 46 billion light years;
- saddle shape and infinite in size; or
- flat and infinite in size.
There are, perhaps, 6 trillion galaxies if our Universe is spherical. Some are so large that it would take 1.5 million years for light to cross. Sum them all up, and there could be 35 septillion (10 to the 24th power) stars out there. But only if the Universe is spherical.
What are the odds that life has only occurred on Planet Earth? Of course, if our Universe is flat or saddle-shape, then there must be other life because the number of stars is infinite. What about parallel universes? Next, the Search for Extraterrestrial Intelligence, or maybe just a comparison of Planet Earth with Jupiter.