People all over the world will be able to see a blue micromoon in the night sky this weekend––a rare celestial event that isn’t expected to happen again for more than 25 years.  During the event, the moon will be the smallest-appearing and farthest away from Earth of any full moon this year.  Here’s what to know about the micromoon, and how to see it best. What is a blue micromoon? A blue moon refers to the second full moon in a single month, which is a fairly uncommon occurrence in and of itself, happening only roughly every two to three years. The last blue moon was on August 31, 2023, and the next one will come on December 31, 2028, according to EarthSky .  A blue moon is not actually blue in color; the name simply refers to the rarity of the phenomenon.…