Charon

A large moon half the diameter of Pluto that is tidally locked with its parent body, forming a binary system where both objects perpetually show the same face to each other as they orbit.

541132 Leleākūhonua

A distant trans-Neptunian object with an extremely elongated orbit that takes it from just beyond Neptune's orbit out to nearly 2,000 AU from the Sun, making it one of the most far-reaching known objects in the Solar System.

The Apollo 10 mission, launched in May 1969, served as a full dress rehearsal for the Moon landing, with astronauts flying the Lunar Module to within 8.4 nautical miles of the lunar surface before returning safely to Earth.