Further, space is a vacuum, meaning that sound cannot carry because molecules are not close enough together to transmit sound between them. That's not to say that space is empty, however. Gas, DUST and other bits of matter float around "emptier" areas of the universe, while more crowded regions can host planets, stars and galaxies.

No one knows exactly how big space is. The difficulty arises because of what we can SEE in our detectors. We measure long distances in space in "light-YEARS," representing the distance it takes for light to travel in a year (roughly 5.8 trillion miles, or 9.3 trillion kilometers).

From light that is VISIBLE in our telescopes, we have charted galaxies reaching almost as far back as the Big Bang, which is thought to have started our universe 13.7 billion years ago. This means we can "see" into space at a distance of almost 13.7 billion light-years. However, ASTRONOMERS are not sure if our universe is the only universe that exists. This means that space could be a lot bigger than it appears to us.


SORRY for wrong answer!