The coincidence problem asks when this phenomenon began to affect the universe.
The quintom scenario explains this phenomenon's equation of state, and this influences the cosmic microwave background through the integrated Sachs-Wolfe effect. The coincidence problem asks when this phenomenon began to affect the universe. In 1998, Adam Riess gathered the first evidence of this phenomenon by showing that type Ia ["one A"] supernovae appeared fainter than predicted. The cosmological constant has been reintroduced to account for the acceleration caused by this phenomenon that accounts for two-thirds of all mass-energy. Name this form of energy named for being difficult to observe directly.
The quintom scenario explains this phenomenon's equation of state, and this influences the cosmic microwave background through the integrated Sachs-Wolfe effect.
dark energy [do not accept "dark matter"]