A Four-Ton SpaceX Rocket Stage Hit the Moon, but No One Saw It

Amateur and professional astronomers pointed their telescopes at the impact site. Most did not detect anything.

The top 3

First to Reach the Lunar Surface: Luna 2: The Soviet Union's Luna 2 became the first human-made object to successfully impact the Moon on September 14, 1959, marking a pivotal moment in the space race.
Heaviest Intentional Impacts: Apollo S-IVB Stages: Five Saturn V rocket S-IVB upper stages, weighing over 14 tons each, were intentionally crashed into the Moon during Apollo missions to create artificial moonquakes for seismic studies, making them the heaviest human-made objects to impact the lunar surface.
LCROSS: Confirming Lunar Water Ice: NASA's Lunar Crater Observation and Sensing Satellite (LCROSS) intentionally impacted the Moon's South Pole in 2009, with its Centaur upper stage, confirming the presence of significant water ice in permanently shadowed regions.