In geophysical terms, the Moon is a planetary-mass object or satellite planet. Its mass is 1.2% that of the Earth, and its diameter is 3,474 km (2,159 mi), roughly one-quarter of Earth's (about as wide as the contiguous United States). The Moon makes Earth more livable, sets the rhythm of ocean tides, and keeps a record of our solar system's history.
Explore NASA lunar science here. Use our Moon Phase Calendar to find dates and times of the full Moon, new Moon, and every phase in between. Beyond the phases of the Moon, you will also see daily Moon illumination percentages and the Moon's age. Track the moon phase today with our interactive moon phase calculator.
Moon Trine Moon Synastrycontribution, Get details on the current moon phase and the next full moon date. Moon Phase for today and tonight with current lunar phase, illumination percentage and Moons age. Find out what the Moon Phase is on any other day of the year. Learn how Earth's moon formed, how its orbit affects Earth's tides, why solar and lunar eclipses happen and the history of lunar exploration. Complete lunar calendar with all moon phases for 2026.
Moon Trine Moon Synastrycontribution, View full moon, new moon, first and last quarter, supermoon, blood moon, eclipses and solstices. Interactive calendar with daily moon illumination. Combine with Moon Phase Tracker: Knowing the moon phase tonight along with the exact moonrise and moonset times gives a complete lunar picture. Full moons are spectacular, but crescent moons can offer delicate and beautiful sky scenes.
