A Blue Moon rose on 31 May 2026, and this one came with a twist. Not only was it the second full moon in May (the first appeared on 1 May), it was also a micromoon, sitting at its furthest point from Earth in its orbit. That made it the smallest-looking full moon of the year, a quieter and more distant lunation than the supermoons that tend to grab headlines.
What makes it a "Blue Moon"?
The term has nothing to do with colour. The Moon won't look blue unless there's volcanic ash in the atmosphere bending the light. A Blue Moon simply refers to the second full moon falling within a single calendar month, which happens roughly every two and a half years. It's rare enough to feel significant, but common enough that it's not a once-in-a-lifetime event. The phrase "once in a blue moon" captures that quality well.
What could you see in the sky?
The full moon peaked in the constellation Scorpius, sitting close to Antares, the great red heart-star of the scorpion. In some southern regions, the Moon actually occulted Antares, passing directly in front of it. Even without that, the pairing of a full moon with one of the sky's most mythologically charged stars made for striking viewing.
What does this mean astrologically?
At every full moon, the Sun and Moon sit directly opposite each other in the sky. In late May, the Sun is moving through Gemini, which means the full moon falls in Gemini's opposite sign: Sagittarius. That's true of this Blue Moon too, with the Moon sitting at around 10 degrees Sagittarius in the tropical zodiac.
Sagittarius is the sign of expansion, philosophy, and long journeys, both literal and intellectual. Full moons here tend to bring things to a head around beliefs, freedom, and truth-telling. There's often a restlessness to them, a pull toward the horizon and away from whatever feels constraining.
The fact that this is a Blue Moon adds some weight to that. If the first full moon on 1 May, which fell in Scorpio, stirred something deep and unresolved, this one asks you to lift your gaze and find some meaning in it. Scorpio digs down; Sagittarius looks out. Having both bookend the same calendar month creates an interesting arc.
One more detail worth mentioning: Antares, the fixed star that marks the heart of the Scorpion, sits at around 9-10 degrees Sagittarius in the tropical zodiac due to the gradual precession of the equinoxes over centuries. That puts it right alongside this full moon. Antares carries associations with ambition, intensity, and the dangers of overreaching. Sagittarius already has that tendency baked in, and Antares sharpens the theme. The invitation of this lunation is to be honest about where you've been overdoing it, whether in plans, beliefs, or commitments, and to find the point where vision meets reality.
What to watch for
For those with significant placements in Sagittarius, Gemini, Virgo, or Pisces, this full moon will feel most personally relevant. Check which house Sagittarius rules in your natal chart for clues about where this energy is landing.
This Blue Moon arriving in Sagittarius, flanked by a Scorpio lunation and sitting beside Antares, gives it a particular weight. It's a good moment to complete something, whether that's a creative project, a long-held plan, or a belief you've been carrying without examining. Sagittarius full moons tend to reward honesty over comfort, and Blue Moons tend to mark genuine turning points, even if small ones.