about the universe
Human being living on Neptune would never live for
one "Neptune Year". The Neptune Year is
the time it takes Neptune to travel once around the sun.(165
Edge To Edge the Milky Way is about 100,000 light
is moving slowly away from the Earth
at the rate of 3cm per year.
would explode if the Gravity did not hold its material together.
became a Black Hole,
it would be only a few kilometers across but it could swallow the Earth.