What is dark energy more is unknown than is known we know how much there is and we know some of its properties other than that dark energy is a mystery but an important one roughly 70 of the universe is made of dark energy dark matter makes up about 25 the rest everything on earth everything ever observed with all of our instruments all normal matter adds up to less than 5 . Dark matter theories on its origin substance document dark matter theories on its origin substance is available in various formats such as pdf doc and epub which you can directly download and save in in to you pc. Read free ebook now http pdfnessite book1515163660download books dark matter theories on its origin substance pdf online. Dark matter theories on its origin substance dark matter wikipedia dark matter is a hypothetical form of matter that is thought to account for approximately 85 of the matter in the universe and about a quarter of its total energy density the majority of dark matter is thought to be non baryonic
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