The "AstroThreadBR" hashtag was created by Geisa Ponte and Ana Carolina Posses Nascimento to encourage Brazilian people on Twitter to learn more about astronomy. They started making Twitter threads (messages linked to one another, since Twitter only allows 280-character posts) on hot astronomy topics, and it became so popular that everyone started writing their own threads!
Always using a fun vocabulary, gifs and memes, they keep writing threads and so do we, other astronomers who wanted to be part of it too! For more information about #AstroThreadBR, check out Geisa's website. For the official Twitter account that gathers all threads, click here. Below are all the threads I have written (in Portuguese). And don't forget to follow me on Twitter as well!