Channel: Cosmology Today™

Category: Science & Technology

Tags: black holealbert einsteincosmologybig bang theorymatterdid the universe had a beginninghow wil the universe diedark energyfate of universeexpanding universeuniversewill the universe has an endstephan hawkinsdark matterpulsarage of universe

Description: What is Dark matter More is unknown than is known. We know how much dark energy there is because we know how it affects the Universe's expansion. Other than that, it is a complete mystery. But it is an important mystery. It turns out that roughly 68% of the Universe is dark energy. Dark matter makes up about 27%. The rest - everything on Earth, everything ever observed with all of our instruments, all normal matter - adds up to less than 5% of the Universe. Come to think of it, maybe it shouldn't be called "normal" matter at all, since it is such a small fraction of the Universe.