Yini ama-astronomer ayithola ngokuntengantenga kobomvu?
U-Edwin Hubble wathola ngawo-1920 ukuthi imigqa yokukhanya okuvela emithaleni esemajukujukwini ayedlulela ezindaweni ezinesivinini samandla kagesi aphansi. Lokhu kusenza sikwazi ukuqinisekisa ukuthi izinto ezihlukahlukene ezisemkhathini ziyasuka kithi futhi zisuke komunye nomunye. Lapho umlaza uhamba ngokushesha usuka kumbukeli, kuba yilapho usuka kude naye. Lesi simo sichazwa njengobufakazi bokunwetshwa kwendawo yonke ne-Big Bang.