Decades ago, astronomers predicted a time when there would be so much orbital debris that it could threaten future satellites and even space exploration. That future seems to be arriving, with an estimated 13,000 metric tons of space junk already in low-Earth orbit. Most recently, we learned that the Intelsat 33e satellite experienced a sudden power loss, tumbled, and broke up into at least 20 pieces. We still don't know what caused the breakup.