Complex sentence: This is the crater Neil Armstrong mentions during his final descent onto the lunar surface and the south-west area of the crater rim marks the farthest point that either astronaut traveled from the Lunar Module during their time on the lunar surface for the Apollo 11 mission.
Split into simpler sentences: This is the crater Neil Armstrong mentions during his final descent onto the lunar surface. The south-west area of the crater rim marks the farthest point that either astronaut traveled from the Lunar Module during their time on the lunar surface for the Apollo 11 mission.