how long does it take the moon to revolve

The Moon takes about 27.3 days to revolve once around Earth relative to the distant stars, and about 29.5 days relative to the Sun (from new moon to new moon).

Quick Scoop

• One full orbit (revolution) around Earth relative to the stars is called a sidereal month and lasts about 27.3 days.

• One full cycle of phases (new moon back to new moon) is called a synodic month and lasts about 29.5 days.

• The difference happens because Earth is moving around the Sun , so the Moon has to “catch up” a bit more to line up the same way with the Sun again.

Two ways to count “revolve”

• Sidereal month (27.3 days)
  • Moon completes one true revolution around Earth compared to distant stars.

* Used by astronomers when tracking the Moon’s _actual_ orbit in space.

• Synodic month (29.5 days)
  • Time between repeating phases (new moon to new moon, full moon to full moon).

* Closer to the everyday idea of “about a month” because it matches what we see in the sky.

Simple way to remember it

The Moon goes around Earth in about 27 days , but the phase cycle you see in the sky takes about 29.5 days because Earth is moving around the Sun at the same time.

TL;DR: If the question is “how long does it take the Moon to revolve around Earth,” the precise orbital answer is about 27.3 days , but the phase cycle most people notice is about 29.5 days.

Information gathered from public forums or data available on the internet and portrayed here.