Skylab Skylab Skylab was a United States space station launched and operated by NASA, and occupied for about 24 weeks between May 1973 and February 1974 – the only space station the U.S. has operated exclusively. In 1979 it fell back to Earth amid huge worldwide media attention. Skylab included a workshop, a solar observatory, and other systems necessary for crew survival and scientific experiments. It was launched unmanned by a modified Saturn V rocket, with a weight of . Lifting Skylab into low earth orbit was the final mission and launch of a Saturn V rocket (famous for carrying the
Halo orbit 1996. It used an orbit similar to ISEE-3. Although several other missions since then have traveled to Lagrange points, they typically have used the related non-periodic variations called Lissajous orbits than an actual halo orbit. For example, Genesis, launched in 2001, which also pioneered the use of dynamical systems theory to find low-energy transfers to and from its orbit. In May 2018, Farquhar's original idea was finally realized when China placed the first communications relay satellite into a halo orbit around the Earth-Moon point. In January 2019, the Chang'e 4 spacecraft is scheduled to land in the Von Kármán crater