Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Zuva inyeredzi yePopulation I, kana kuti ine zvinhu zvinorema zvakawanda. Kuumbwa kweZuva kungave kwakatangwa nemasaisai anobva kune imwe kana kuti mamwe supernovae ari pedyo. Izvi zvinoratidzwa nehuwandu hwezvinhu zvinorema muSolar System, zvakadai segoridhe uye uranium, zvichienzaniswa nehuwandu hwezvinhu izvi mune zvinonzi Population II, nyeredzi dzisina zvinhu zvinorema. Zvinhu zvinorema zvaigona kuva zvakabudiswa nemhinduro dzenyukireya dze endothermic mukati me supernova, kana nokushandurwa kupfurikidza nokumedzwa kwe neutron mukati meredzi huru yechipiri-chizvarwa. Zuva ndiro chinhu chakajeka zvikuru mudenga rePasi, nehukuru hunoratidzika hwa -26.74. Iyi inenge yakapetwa kane mabhiriyoni 13 kupfuura nyeredzi inopenya zvikuru inotevera, Sirius, iyo ine ukuru hunooneka hwa -1,46. Avhareji yekure kwepakati peZuva kusvika pakati pePasi inenge 1 astronomical unit (anenge 150,000,000 km; 93,000,000 mi), kunyange zvazvo chinhambwe ichi chichichinja sezvo Nyika ichifamba kubva perihelion muna Ndira kuenda aphelion muna Chikunguru. Paavhareji iyi, chiedza chinobva paGungwa chichienda paNyika mumaminitsi anenge 8 nemasekonzi 19, nepo chiedza chinobva kunzvimbo dziri pedyo neGungwa nePasi chichitora masekondi maviri. Simba rechiedza chezuva rinotsigira rinenge upenyu hwose huri pasi pano kupfurikidza nephotosynthesis, uye rinotungamirira mamiriro okunze epasi nemamiriro okunze.  Mubvunzo: Chiedza chinotora nguva yakareba zvakadini kuti chisvike kunzvimbo iri pedyo nezuva?
Maminitsi 8 nemasekonzi 19