No, you are almost certainly not going to be hit by a 10-story, 23-ton piece of a rocket hurtling back to Earth.

That said, the chances are not zero. Part of China¡¯s largest rocket, the Long March 5B, is tumbling out of control in orbit after launching a section of the country¡¯s new space station last week. The rocket is expected to fall to Earth in what is called ¡°an uncontrolled reentry¡± sometime on Saturday or Sunday.

Whether it splashes harmlessly in the ocean or impacts land where people live, why China¡¯s space program let this happen ¡ª again ¡ª remains unclear. And given China¡¯s planned schedule of launches, more such uncontrolled rocket reentries in the years to come are possible.