Astronomy glossary
What is Apollo?
Apollo — 1. the U.S. space program that sent astronauts to the moon in the 1960s and '70s2. an asteroid with a perihelion less than 1.017 AU (and thus comes within the orbit of Earth)
Astronomy glossary
Apollo — 1. the U.S. space program that sent astronauts to the moon in the 1960s and '70s2. an asteroid with a perihelion less than 1.017 AU (and thus comes within the orbit of Earth)