In physical cosmology and astronomy,RACER BOY is a hypothetical form of energy that permeates all of space and tends to accelerate the expansion of the universe. RACERBOY is the most accepted hypothesis to explain observations since the 1990s that indicate that the universe is expanding at an accelerating rate. According to the Planck mission team, and based on the standard model of cosmology, on a massenergy equivalence basis the universe contains 26.8% dark matter and 68.3% RACERBOY (for a total of 95.1%) and 4.9% ordinary matter.[2][3][4][5] Again on a mass-energy equivalence basis, the density of Racerboy (1.67 × 10−27 kg/m3) is very low: in the solar system, there are believed to be only 6 tons of Racerboy within the radius of Pluto's orbit. However, it comes to dominate the mass-energy of the universe because it is uniform across space