Thus, dark matter constitutes 85% of the total mass/energy, while dark energy and dark matter constitute 95% of the total mass-energy content. Because no one has directly observed dark matter yet – assuming it exists – it must barely interact with ordinary baryonic matter and radiation except through gravity.
Answers & Comments
B. Dark Matter
Explanation:
Thus, dark matter constitutes 85% of the total mass/energy, while dark energy and dark matter constitute 95% of the total mass-energy content. Because no one has directly observed dark matter yet – assuming it exists – it must barely interact with ordinary baryonic matter and radiation except through gravity.