marsPageIntroText top-level property

Implementation

String marsPageIntroText =
    'The Mars 2020 Perseverance Rover searches for signs of ancient microbial life, to advance NASA\'s quest to explore the past habitability of Mars. The rover is collecting core samples of Martian rock and soil, for potential pickup by a future mission that would bring them to Earth for detailed study.  Perseverance also tests technologies needed for the future human and robotic exploration of Mars.';