Moon / Orbits

Every Year the Moon Drifts 3.8 cm Further Away — and Takes Time With It

2026-08-30
Enjoyed the clip?
A new space fact every day — follow so you never miss one.

Right now, the Moon is quietly stealing our time.

Right now, the Moon is quietly stealing our time. Every single year it drifts about 3.8 centimetres further from Earth — not because anything went wrong, but because of tidal forces tugging between our two worlds. And that same gravitational tug is slowing Earth's spin, making every day fractionally longer than the last. Hundreds of millions of years ago, a full day here lasted only around 22 hours. You would have had less time for everything. Looking further forward, the Moon will eventually appear so small in our sky that total solar eclipses simply won't happen anymore. That precise alignment — Moon face perfectly covering the Sun — is a feature of this particular moment in Earth's history. We happen to live in it. Follow Deep Field Vault for more of the universe, one true fact at a time.

3.8 cm per year

  • The Moon moves
  • further away
  • every single year

Tidal forces

  • Earth & Moon
  • pulling on each other
  • slowing our spin

Days were shorter

  • Hundreds of millions
  • of years ago:
  • ~22-hour days

A vanishing view

  • One day the Moon
  • will be too small
  • for total eclipses

We're living in it

  • This alignment
  • is rare in
  • Earth's whole history
Imagery: NASA (public domain) · View original on NASA ↗
Follow Deep Field Vault
A new space fact every day — follow so you never miss one.