Group 1 - The event of Mercury accompanying the Moon on June 27 is highlighted as a noteworthy astronomical occurrence, with favorable observation conditions [1][2] - Mercury is the smallest planet in the solar system and is often difficult to observe due to its proximity to the Sun, only becoming visible during its greatest elongation, known as "greatest distance" [1][2] - This month, Mercury appears as an "evening star" after sunset, positioned in the northwest sky, while the crescent Moon will accompany it, creating a rare "star-moon dialogue" [2] Group 2 - The concept of "greatest distance" is explained, with distinctions made between eastern and western greatest distances, affecting visibility during dawn and dusk [2] - Observers are encouraged to use binoculars or small telescopes for better viewing of the Mercury-Moon conjunction, and astrophotographers are advised to capture this unique moment [2] - The nearby Beehive Cluster, a loose star cluster, can also be observed, although it may be challenging due to the remaining daylight [5]