The Moon
The Moon is Earth’s only natural satellite—a rocky, cratered body about one‑quarter the diameter of Earth, orbiting at an average distance of approximately 384,400 km. It influences tides, stabilizes Earth’s axial tilt, and was formed about 4.5 billion years ago following a collision between Earth and a Mars-sized object.
Source: science.nasa.gov
APODs including "The Moon"
Astronaut Kicks Lunar Field Goal
01/04/1998
Score three points for NASA. With time running out late in Apollo 15's mission to the Moon in 1971, Astronaut David Scott prepared to "split the uprights" and bring about yet another dramatic end-of-the-mission win for NASA. Scott used a special "lunar football" designed for the rugged games held on the Moon. R1D1, a predecessor to R2D2, cheers from the sideline. Happy April Fools Day from the folks at APOD. In reality, Astronaut Scott adjusts one of Apollo 15's lunar experiments. The foreground device actually measured high-energy particles that escape from the Sun.