We propose a solution to the ‘ cuspy-core ’ problem by extending the geodesic equations of motion using the Dark Energy length scale \lambda _ { DE } = c / ( \Lambda _ { DE } G ) ^ { 1 / 2 } .
This extension does not affect the motion of photons ; gravitational lensing is unchanged .
A cosmological check of the theory is made , and \sigma _ { 8 } is calculated to be 0.68 _ { \pm 0.11 } , compared to 0.761 _ { -0.048 } ^ { +0.049 } for WMAP .
We estimate the fractional density of matter that can not be determined through gravity at 0.197 _ { \pm 0.017 } , compared to 0.196 ^ { +0.025 } _ { -0.026 } , the fractional density of nonbaryonic matter .
The fractional density of matter that can be determined through gravity is estimated at 0.041 _ { -0.031 } ^ { +0.030 } , compared to 0.0416 _ { -0.0039 } ^ { +0.0038 } for \Omega _ { B } .