Space Station's Robotic Cargo Ship Fleet (A Photo Guide)

Orbital Sciences' Cygnus

NASA

The Orbital ATK Cygnus cargo spacecraft, as seen from the International Space Station in 2016.

Orbital Sciences' Cygnus

Karl Tate, SPACE.com

Cygnus, along with SpaceX's Dragon, has won a NASA contract to deliver goods to the space station in the coming years.

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Space.com is the premier source of space exploration, innovation and astronomy news, chronicling (and celebrating) humanity's ongoing expansion across the final frontier. Originally founded in 1999, Space.com is, and always has been, the passion of writers and editors who are space fans and also trained journalists. Our current news team consists of Editor-in-Chief Tariq Malik; Editor Hanneke Weitering, Senior Space Writer Mike Wall; Senior Writer Meghan Bartels; Senior Writer Chelsea Gohd, Senior Writer Tereza Pultarova and Staff Writer Alexander Cox, focusing on e-commerce. Senior Producer Steve Spaleta oversees our space videos, with Diana Whitcroft as our Social Media Editor.