The International Space Station has been orbiting Earth for more than two decades, and if you know where and when to look you might see it overhead.

California-based Vast Space has revealed the design of a space station that could replace the ISS when it's decommissioned in 2031.The Latest Tech News, Delivered to Your Inbox

Vast Space, a California company, believes its Haven 2 design is the best successor to the decades-old ISS project.

In late September, the inspector general identified 588 replacement parts that were operating beyond their planned operational lifetimes.

Vast's Haven-2 concept joins three other commercial space-station proposals that have been submitted to NASA, and would string together modules launched from 2028 through 2032.

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For more than 25 years, the International Space Station (ISS) has been a beacon of human ingenuity, orbiting 250 miles above Earth. But this symbol of international collaboration is reaching the end of its operational life.