tides

What causes ocean tides? The Moon's differential gravity, why there are two high tides daily, spring and neap tides, and tidal locking — explained.

If the Moon vanished overnight, Earth's tides, axial tilt, and life itself would change forever. Here's the science of what happens next.

The Moon is more than a nightlight. It holds Earth's tilt steady, drives our tides, and may have made complex life possible.

The Moon raises the ocean tides, slows Earth's rotation, and is drifting away at about 3.8 cm per year. Whether it also keeps Earth's tilt stable enough for a mild climate is a live scientific debate, and this article lays out both sides.

A second moon would change tides, eclipses, calendars, and possibly life itself. Here's exactly what would happen — based on real orbital physics — if we suddenly had two moons.