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Astronomy Tool

Moon Phase Calculator

Discover the current phase of the moon, its illumination, and age. Track the lunar cycle with precision.

Visual
Real-time Phase
Data
Illumination %

📌 Table of Contents

Understanding Moon Phases

The moon has no light of its own; it reflects the sun. As it orbits Earth, the angle causes us to see different amounts of the lit side.

  • 🌑 New Moon: Not visible.
  • 🌒 Waxing Crescent: Thin sliver on right.
  • 🌓 First Quarter: Half moon (Right side).
  • 🌔 Waxing Gibbous: Almost full.
  • 🌕 Full Moon: Fully illuminated.
  • 🌖 Waning Gibbous: Shrinking.
  • 🌗 Last Quarter: Half moon (Left side).
  • 🌘 Waning Crescent: Thin sliver on left.

Synodic Month

A complete lunar cycle takes approximately 29.53 days. This is why the full moon date shifts slightly each calendar month.