See A Rare ‘Blue Moon’ Rise After Sunset This Week

BreakingInnovationScienceSee A Rare ‘Blue Moon’ Rise After Sunset This WeekByJamie Carter,Senior Contributor.Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky.Follow AuthorMay 25, 2026, 03:00am EDTToplineMay ends with a rare calendar event — a second full moon in a single month, commonly known as a Blue Moon. Leading up to it, the moon passes bright stars and constellations while Venus and Jupiter continue to draw closer together in twilight ahead of their landmark close conjunction on June 9. Here’s everything you need to know about stargazing this week, May 25-31. On May 30, the second full moon of the month will rise at dusk, with the so-called Blue Moon occurring officially on May 31.gettyTimelineMonday, May 26-Tuesday, May 27On Monday, the 84%-lit waxing gibbous moon moves eastward into Virgo, heading toward bright star Spica. By Tuesday night, it’s 90%-lit and left Spica behind.Friday, May 29A 98%-lit, nearly full moon will blaze in the eastern sky during twilight, with Antares, the brightest star in the summer constellation Scorpius, easily visible below it about two hours after sunset.Saturday, May 30Although the full moon officially occurs early tomorrow, tonight is when to watch the full Blue Moon rise. Find an unobstructed southeastern horizon at the time of moonrise where you are and be patient — it will appear large and orange on the horizon. You’ll soon see Antares just below it.Sunday, May 31The moon reaches full phase early today, becoming the second full moon of May. This makes it a Blue Moon — a calendrical quirk rather than a change in color. if (!window.cnxel) { window.cnxel = {}; window.cnxel.cmd = []; var iframe = document.createElement('iframe'); iframe.style.display = 'none'; iframe.onload = function() { var iframeDoc = iframe.contentWindow.document; var script = iframeDoc.createElement('script'); script.src = '//cd.elements.video/player.js?cid=62cec241-7...