What happened to the female lead at the end of Interstellar Travel? I don't understand. Is he still alive or dead or can't be found?

The ending of Interstellar was a complicated mystery, and many readers were confused. However, according to the plot of the novel, the heroine Matthew eventually stayed in outer space on Earth and became a legendary figure. It was said that Matthew used a wormhole to travel through time and space to save mankind when the earth was facing a disaster. Although she eventually returned to the vicinity of the black hole, she did not return to Earth in the end. Instead, she stayed on Earth in outer space. Some people thought Matthew might have died because her body had been exhausted after spending too much time near the black hole. However, there were also some readers who believed that Matthew did not die but became a legendary figure who stayed in outer space forever. The ending of Interstellar is a mystery full of controversy and uncertainty. Only the readers themselves can understand the meaning behind it.