How wide does the South Pole-Aitken Basin stretch across the lunar surface?
Answer
Roughly 2,500 kilometers (about 1,600 miles)
The sheer scale of the South Pole-Aitken Basin (SPA) is immense, marking it as the largest impact crater known in the Solar System. Measurements indicate that the basin stretches across a diameter of approximately 2,500 kilometers. To provide scale, this dimension is comparable to the entire land area of a major nation or state, such as the entire state of Texas or nearly the entire country of France. This vast expanse far exceeds the dimensions of younger, more prominent craters found elsewhere on the Moon.
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