Normal sudoku rules apply. Digits separated by a white dot are consecutive. Draw a single route that travels orthogonally from cell to cell, never branching, crossing, or overlapping, which eventually closes into a loop. The loop must pass through every planet. Thick black borders represent black holes that the route cannot cross. A digit in a satellite dish equals the number of loop cells in the 3×3 box centred on that cell. Along the loop, one parity forces the route to turn (making a 90° angle) while the other forces it to continue straight (making a 180° angle), it is up to the solver to determine which parity corresponds to which behaviour. Any two cells that are adjacent along the loop must contain non-consecutive digits unless the loop is passing through a white dot (where consecutive digits may appear).