Hole Punch: Sling your spaceship around gravitational fields(notoriousbfg.com)
345 points by trwhite | 85 comments
Hole Punch is a browser puzzle game where players place black holes whose gravity bends a spaceship's trajectory toward a target.
#gravity on Hacker News
2 stories tagged gravity, newest first.
A wonderful coincidence or an expected connection: why π² ≈ g(roitman.io)
465 points by signa11 | 311 comments
A blog post explaining why π² is approximately equal to g (9.81 m/s²), tracing the connection to the historical seconds-pendulum definition of the metre.