Harsh flares, bright beginnings and a tight gravitational grip on the innermost planets could be disastrous for any liquid water that's available. (sciencenews.org)
It happens because the Sun's gravitational grip gradually weakens as our star ages and loses mass. (sciencedaily.com)
As the cosmos expanded, matter gradually spread out, and its gravitational grip weakened, hitting a balance with dark energy about 5 billion years ago, causing the expansion to coast at a steady rate for a while, neither accelerating nor slowing down. (discovermagazine.com)