Baƙaƙen ramuka yankuna ne a sararin samaniya tare da jan hankali mai ƙarfi mai ban mamaki, inda babu wani abu, ko haske, da zai iya tserewa. Sun samo asali ne daga ka'idar Albert Einstein na alaƙa gabaɗaya kuma sun zo da girma dabam dabam, tare da yawansu yana ƙayyade ƙarfinsu da tasirin su. Baƙaƙen ramukan taurari suna samuwa lokacin da manyan taurari suka ruguje, yayin da ake samun manyan ramukan baƙar fata a tsakiyar yawancin taurari, gami da namu. Duk da yanayin tarkon haske, masana kimiyya sun sami damar tantance kasancewarsu ta hanyar tasirin su akan abubuwan da ke kewaye da su da haske. Kwanan nan, Hoton farko kai tsaye na babban rami mai girma ya kama shi ta hanyar Telescope Event Horizon, yana ci gaba da kalubalantar fahimtarmu game da sararin samaniya.
Betelgeuse wani tauraro mai girma jajayen taurari ne wanda yake a cikin ƙungiyar taurarin Orion wanda shine ɗayan taurari mafi girma da haske da ake iya gani daga Duniya. Yana kusa da ƙarshen zagayowar rayuwarsa, bayan da ya ƙare ainihin man hydrogen ɗinsa kuma ya fara haɗa helium zuwa wasu abubuwa masu nauyi, kuma an yi imanin shi ne mafarin wani gagarumin al'amari na supernova. Masana ilmin taurari sun yi amfani da dabaru daban-daban don yin nazarin fasalin saman Betelgeuse, bambancin zafin jiki, da sauran kaddarorin, kuma a ƙarshen 2019 da farkon 2020, ta sami wani abin da ba a saba gani ba. Wannan ya haifar da hasashe cewa maiyuwa yana gab da zuwa supernova, kuma nazarin fashewar supernova na ƙarshe zai ba da fahimi mai mahimmanci a ƙarshen matakan juyin halitta.