Njengoba ubuchwepheshe be-astrophysics nokucwaninga kuqhubeka kuthuthuka, umbuzo owodwa usaqhubeka: ingabe kukhona ukuphila kwenye indawo endaweni yonke? Umthala i-Milky Way uwodwa unamakhulu ezigidigidi zezinkanyezi zasemkhathini, kodwa ososayensi bavame ukubheka izici ezintathu ezibalulekile ocwaningweni lwabo oluqhubekayo: amanzi, amandla, kanye...