A rare astronomical phenomenon: The small blue moon (micromoon) illuminates the sky on Sunday evening.

On the evening of Sunday, May 31, the sky will witness a rare astronomical phenomenon known as the "Micro-Blue Moon," where the full moon appears smaller and less bright than usual as a result of reaching its farthest point from Earth during its annual orbit.

The "Blue Moon" phenomenon occurs when two full moons appear during the same month. It is an infrequent astronomical event that occurs once every two to three years, after the beginning of May witnessed the first full moon of this month.

According to astronomical data, during this phenomenon the moon moves away to a distance of approximately 406,135 kilometers from the Earth, which leads to a reduction in its apparent size and a noticeable decrease in its brightness, in a phenomenon known as the "micromoon," which is the opposite of the "supermoon" phenomenon.

The full moon of May 31 is expected to appear about 6% smaller and about 10% less bright than a typical full moon, in a remarkable celestial spectacle anticipated by astronomy enthusiasts around the world.