Short answers, pulled from the story.
Sobral is famous as the site where British scientists observed a total solar eclipse on the 29th of May 1919 and gathered data that provided the first observational proof of Albert Einstein's theory of general relativity. The team was led by Sir Frank Watson Dyson. Einstein had published his theory in 1916, and the Sobral observation confirmed one of its key predictions.
Sir Frank Watson Dyson led the British scientific team that traveled to Sobral for the solar eclipse of the 29th of May 1919. Their observations, alongside a simultaneous expedition to the island of Principe, produced the first proof of Einstein's general relativity.
The Museu do Eclipse, known in English as the Museum of the Eclipse, is a museum in Sobral dedicated to the 1919 solar eclipse observation and its scientific significance. A monument in Patrocínio Square marks the location of the eclipse observation, and a planetarium inaugurated in 2015 stands beside it.
Sobral has two public universities: the Universidade Federal do Ceará and the Universidade Estadual do Vale do Acaraú. The city also has private institutions including Unopar and a theological institute.
Sobral is the birthplace of comic actor and film producer Antônio Renato Aragão, singer Belchior, and Emília Barreto, who was crowned Miss Brazil in 1955. Zacarias Gondim, one of the creators of the Anthem of Ceará, and figure skater Florent Amodio also come from the city.
Sobral's economy is based on agriculture, services, and some manufacturing industries. The city is the fifth largest municipality in Ceará after Fortaleza and serves as the seat of the Roman Catholic Diocese of Sobral.