OUR COSMOS

Most of universe invisible, experts say

Everything you can see – from a distant nebula to the family dog – makes up only about 5 per cent of the universe. The rest is mystery stuff – dark matter and dark energy.
We should be wary of equating existence with visibility because most of the universe is not something we can see, University of Toronto astronomy professor John Percy said.
Dark matter is similar to normal matter in that it exerts gravitational force, Prof. Percy said, but most similarities end there. Some of the remaining 95 per cent might be made up of dark objects like planets, but “most likely it's some kind of elementary particle which doesn't interact much with other things".