dark matter
Only about 5% of the matter in the Universe is visible. The rest is of an unknown nature and is referred to as dark matter (27%) and dark energy (68%). Finding out what it consists of is a major question for modern science.
Only about 5% of the matter in the Universe is visible. The rest is of an unknown nature and is referred to as dark matter (27%) and dark energy (68%). Finding out what it consists of is a major question for modern science.