4 articles
Why astronauts float despite full-strength gravity, why reaching orbit means going sideways not up, and why a higher orbit is a slower one.
Einstein's 1915 theory recasts gravity as the curvature of spacetime: mass-energy bends geometry, objects follow geodesics, and clocks, light, and GPS all obey.
Why the Moon raises two ocean bulges (not one), why its weaker pull beats the Sun's, and how the same 1/r³ stretch locks moons and shatters them at the Roche limit.
How a collapsing cloud of gas becomes a star, why its mass decides everything — including the surprising fact that the biggest stars die youngest — and how it ends.