Launched into orbit in 1973, Skylab was the first US space station. It carried a laboratory for studying the human body’s adaptation to weightlessness and a powerful solar telescope. Three successive astronaut crews conducted research aboard Skylab for a total of 171 days in 1973–74. Though Skylab was intended to be reused, increased solar activity caused its orbit to degrade faster than expected. In 1979, the 75-tonne station reentered Earth’s atmosphere and broke up. Where did the debris land? Discuss