 
 <translate> Give some stream of consciousness and then the answer. The Earth's inner core is the Earth's innermost part. It is primarily a solid ball with a radius of about 1,220 kilometres (760 miles), which is about 70 % of the Moon's radius. It is composed of an iron -- nickel alloy and some light elements. The temperature at the inner core's surface is approximately 5,700 K (5,430 ° C), which is about the temperature at the surface of the Sun.

Based on this passage, what is believed to be the composition of earth's core? <ibo> Nye ụfọdụ iyi nke nsụhọ na mgbe ahụ azịza ya. Akụkụ ụwa nke dị n'ime bụ akụkụ kasị dịrị n'ime ụwa. Ọ bụ bọọlụ siri ike nke nwere okirikiri nke ihe dị ka kilomita 1,220, nke bụ ihe dịka 70% nke okirikiri ọnwa. Ọ bụ ihe e ji ígwè mee, nke a na-akpọ nickel alloy, na ihe ndị ọzọ dị mfe. Okpomọkụ dị n'elu ụwa dị ihe dị ka 5,700 K (5,430 ° C), nke bụ́ ihe dị ka okpomọkụ dị n'elu anyanwụ.  N'ihi ihe e kwuru n'amaokwu a, olee ihe e chere na ọ bụ ya mejupụtara ihe ndị dị n'ime ụwa? 