Sérgio Sacani
Brazilian geophysicist and creator of Space Today, sharing astronomy, space exploration and science through videos, podcasts and courses.
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Sérgio’s happenings, collected from public sources, plus his backstory and Starbook, where fans write.
Known for
YouTube
YouTube
YouTube
Live eventOverview
- From
- Brazil
- Work
- Geophysicist, science communicator and podcast host
- Education
- Geophysics at USP; master’s in petroleum engineering and doctorate in geosciences at Unicamp
- First blog
- CiencTec, June 2009
- YouTube chapter
- Space Today TV launched in 2015
Mini bio
How it started.
Sacani’s interest in astronomy grew around the return of Halley’s Comet. Before his online audience, he typed the Boletim Astronômico Aldebaran and mailed it to astronomy groups, observatories and planetariums.
From blog to video.
He started CiencTec in June 2009, building a blog around scientific news and documented sources. It later became Space Today, followed by the Space Today TV YouTube channel in 2015. That channel became the center of his public science work.
A scientist behind the microphone.
He trained in geophysics at USP and completed postgraduate studies in petroleum engineering and geosciences at Unicamp. His public work brings astronomy and space exploration into Portuguese-language videos and conversations.
More ways to follow his curiosity.
In 2021 he began hosting Ciência Sem Fim with Estúdios Flow. In 2026 he introduced Além da Ciência with Grupo Primo, extending his conversations into artificial intelligence and technology. Fans can also study with him through Academy Space or meet the wider science community at Space Today Experience.
Creditschronological, newest first
Video and podcasts
- 2026Além da CiênciaHost, in partnership with Grupo Primo
- 2021Ciência Sem FimHost
- 2015Space Today TVCreator and presenter
Live events
- 2026Space Today Experience, second editionCreator and coordinator
Awards
Quotes
As crianças fazem as melhores perguntasSérgio Sacani, Metrópoles Talks
“Children ask the best questions.” After the October 29, 2026 event in Brasília, he highlighted a question from a child in the audience.
Trivia
- Before blogging, he shared astronomy through a typewritten newsletter sent by post.
- The name Space Today pays tribute to Universe Today and Space.com.
- His postgraduate training is in petroleum engineering and geosciences, alongside his public work about the cosmos.
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