Crossword puzzle clue "first down distance"

Long-distance runner Ron once married to long-distance runner Mary Decker

First-down distance

First word across in the first-ever crossword (1913) and the first of a dozen appearances of the word in this puzzle's grid, written word search-style (left, right, down, and diagonally) ... Can you f

Distance down

Distance covered by a first step

German astronomer who was the first to measure the distance to a star