阅读下面短文,在空白处填入1个单词或括号内单词的正确形式。
Imagine 【小题1】（take） a photo of an apple on the moon with your smartphone. It seems 【小题2】possible）, right? But that's what it was like【小题3】 scientists to take a photo of a black hole in space. In spite of many challenges, scientists have finally gotten the first image of a black hole.
Black holes are one of the most mysterious things in 【小题4】 universe. According to Einstein's theory, a black hole comes from a dying star. 【小题5】 collapses（坍塌）into a small point with a lot of mass and strong gravity.The strong gravity of black hole allows it 【小题6】（pull） other things in and "eat"them.Not even light can escape a black hole.
The photo proves Einstein was right . It makes the general theory of relativity 【小题7】（believe）.Although they are mysterious, it is likely that black holes are 【小题8】（actual） quite common. Scientists believe that every large galaxy has a big black hole at its center-the one in our galaxy 【小题9】（call） Sagittarius A.Considering this, studying black holes can tell us many things about other galaxies 【小题10】 even the entire universe.