Cosmology -

This is the "normal" matter we can see—stars, planets, trees, and people. It makes up a surprisingly small fraction of the total universe.

The evidence for the Big Bang theory is extensive and comes from many lines of observation. For example: cosmology

But Elara wasn’t looking up. She was looking back. This is the "normal" matter we can see—stars,

The ultimate end of everything depends on the battle between gravity and dark energy. There are three leading theories: cosmology

So, what does the future hold for the universe? There are several possible scenarios, depending on the density of matter and energy in the universe. Here are a few possibilities: