Nyora kupfuurira kweiyi ndima - Muna 1920 akagadzwa kuva mutungamiriri weAllegheny Observatory. Mugore rimwe chetero akapinda muGreat Debate
naHarlow Shapley (anonziwo Shapley<unk>Curtis Debate) pamusoro pechimiro chema nebulae nemapoka enyeredzi, uye kukura kwechisiko chose. Curtis akatsigira pfungwa yava kugamuchirwa iye zvino yokuti kune mamwe mapoka enyeredzi kunze kweGwara Renzou.