In the mid-20th century, boys could study technical subjects while girls were expected not. However, Bell Burnell's parents challenged these 1 , which enabled her to study science. Bell Burnell knew before leaving school that she wanted to be a radio astronomer. That 2 led her to go to the University of Glasgow, where she was the only 3 in her class. After graduation, Bell Burnell went to Cambridge University, where she yet again had to prove that she 4 .
Her first project, working with her thesis supervisor (论文导师) Hewish, was 5 certain objects called quasars (类星体). It was 6 to have a female student on this project. Bell Burnell herself has said that the only other females 7 were secretaries. At this stage, it was she who 8 the telescope and analyzed the data.
One day, checking on the data, Bell Burnell saw a signal that she couldn't 9 . To understand what it was she ended up bringing this 10 to Hewish, who said it was interference. He thought that Bell Burnell had wired up the radio telescope 11 and that is why the new signal had appeared. However, she saw the signal again afterwards. 12 , she tried to reach Hewish. Once he 13 the pulse with his own eyes, he knew it wasn't interference, and a new research project began. But, with just one pulse it was hard to have a(n) 14 discovery.
A couple of days later, Bell Burnell was in her study, and she saw something 15 to the first pulse, and thus 2 pulsars were discovered.
