Thursday is the 40th anniversary of Skylab falling back to Earth.

While most people know it as America’s first manned space station, its influence extends much further.

Skylab launched May 14, 1973 and orbited the Earth 2,249 times before it fell to the Earth’s surface, landing in a remote part of Australia on July 11, 1979.

“Skylab’s biggest legacy was that it was a teaching tool,” author and filmmaker Dwight Steven-Boniecki, who directed the documentary Searching for Skylab, told Digital Trends.

“It completely rewrote the book on solar physics.”

Boniecki said he directed the film “to bring light to the lesser known achievements of the space station and its lasting legacy for space exploration.

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