"Dark Matter" and "Dark Energy" are Terms That Hide Ignorance

We can measure the influence of this thing we call dark energy, which is forcing an acceleration of the expanding universe. We don't know what that is, we don't know anything about it, other than what it's doing to the universe.

Then 85 percent of the gravity of the universe has a point of origin about which we know nothing. We account for all the matter and energy that we're familiar with, measure up how much gravity it should have — it's about one-sixth of the gravity that's actually operating on the universe. We call that dark matter, but what we should call it is "dark gravity." We don't know what that is either.

Neil deGrasse Tyson, Neil DeGrasse Tyson Explains Why The Cosmos Shouldn't Make You Feel Small (February 27, 2014)

• ignorance
• science
• unknowing