Mars' issue holding atmosphere isn't a gravity problem, it's because it isn't magnetic. magnets create a force field that keep atmospheres safe from solar wind. Putting a really big magnet between mars and the sun would fix this.
Mars' issue holding atmosphere isn't a gravity problem, it's because it isn't magnetic. magnets create a force field that keep atmospheres safe from solar wind. Putting a really big magnet between mars and the sun would fix this.