Ajụjụ a ga-ajụ bụ: "N'oge ihe a mere, a ga-enwe ọnụ ọgụgụ buru ibu nke ihe mberede na ọnwa, na site na nkwubi okwu na Earth, Mercury, Venus na Mars"."? Isiokwu a bụ Late Heavy Bombardment.
"Gịnị mere na ọnwa n'oge Late Heavy Bombardment?"