2.5g means you weigh 2.5 times as much. So if you're 150lbs on Earth that means you'd weigh 375lbs on this new planet. Weighing 375lbs is certainly inconvenie

2.5g means you weigh 2.5 times as much. So if you're 150lbs on Earth that means you'd weigh 375lbs on this new planet. Weighing 375lbs is certainly inconvenient, but it's not like habitation at 375lbs is impossible, especially if you have a scooter. I wonder what happens if a human child grows up in a 2.5g environment. I imagine they grow up to be short, stocky, and extremely muscular. Adaptation probably plays a big role here. If you give a 150lb person a suit that weighs 225 lbs and tell them to wear it all the time, they probably give up after a few days. But if you tell a 150lb person to eat more until they're 375lbs, their body has time to adapt. Since the new planet is 100 light years away, even at the speed of light we're talking about a 100-year journey minimum. Maybe the generation ship used to make the journey could use artificial gravity to smoothly transition from 1g to 2.5g over the course of 100 years. Loading the ship with people who are stocky & muscular is another option. I don't think living in enhanced gravity needs to be terrible. Astronauts have to exercise more in order to maintain fitness in low-gravity environments. It appears to follow that if you're living in an enhanced-gravity environment, you can get away with exercising a lot less and still maintain fitness :-)