Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe . Primary evidence for dark matter comes from calculations showing that many galaxies would fly apart, or that they would not have formed or would not move as they do.In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales. 

Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe . Primary evidence for dark matter comes from calculations showing that many galaxies would fly apart, or that they would not have formed or would not move as they do.In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales. 

Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe . Primary evidence for dark matter comes from calculations showing that many galaxies would fly apart, or that they would not have formed or would not move as they do.In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales.