n. The time of "day" when the Earth begins to rise over the horizon of another planet according to a local observer.
n. The irregular event of the Earth appearing above the horizon of the moon.
Word Usage
"Everest, but I just learned that the STS-130 patch was inspired by the "earthrise" photo that Dennis Wingo and our team at the Lunar Orbiter Image Recovery Project released in Nov. 2008."