Task: Text Simplification
Input (English): reflection nebulae are usually blue because the scattering is more efficient for blue light than red -lrb- this is the same scattering process that gives us blue skies and red sunsets -rrb-.
Output (English): reflection nebulae are commonly blue because the scattering is more powerful for blue light than red -lrb- this is the same reason for the sky appears in blue and the sunset in red colo.