Rich Purnell's Office

Lore & Background

Rich Purnell is a NASA astrodynamicist. In the novel, he devises a 'slingshot' trajectory around Earth for a gravity assist that could get Hermes back to Mars on a much-extended mission to save Watney, using the Chinese rocket booster to send a simpler resupply probe to Hermes as it passes Earth. This plan is called the 'Rich Purnell Maneuver.' NASA Administrator Teddy Sanders vetoes the maneuver, as it would entail risking the other crewmembers, but Mitch Henderson, the Ares 3 flight director, secretly emails the details to Hermes. All five of Watney's crewmates approve the plan. Once they begin the maneuver, having disabled the remote overrides, NASA has no choice but to support them. The resupply ship docks with Hermes successfully. Purnell's office is not described in the source, but his role is central: he is the astrodynamicist whose calculations make the rescue possible.

In Their Own Story

The fluorescent lights hummed over a desk buried in printouts. Rich Purnell stared at his whiteboard, the numbers blurring as he traced a line from Earth to Mars. His coffee had gone cold hours ago. He erased a figure, rewrote it, then stepped back. The room was silent except for the scratch of his marker. On the board, a trajectory arced like a whisper—a path that could save a man or doom him. He didn't smile. He just picked up his phone and dialed. The fate of Mark Watney now lived in this small, cluttered office.

Reader's Guide

Rich Purnell's office is a compact, academic workspace at NASA's Jet Propulsion Laboratory in Pasadena, California. It serves as the creative and analytical hub for the Rich Purnell Maneuver, the gravitational slingshot plan that rescues Mark Watney from Mars. In the story, this office is where Purnell works alone, crunching numbers and refining his proposal before presenting it to NASA leadership. Its role is crucial: it's the birthplace of the mission's most daring element, highlighting the importance of individual expertise within a large organization. The office matters because it symbolizes the quiet, often overlooked contributions that make space exploration possible—a reminder that breakthroughs can come from a single desk, not just a control room. Fans appreciate it as a testament to the power of science and persistence.

Did You Know?

• Rich Purnell is a NASA astrodynamicist who devises the 'Rich Purnell Maneuver,' a slingshot trajectory around Earth for a gravity assist to get Hermes back to Mars.
• The maneuver uses a Chinese rocket booster to send a simpler resupply probe to Hermes as it passes Earth.
• NASA Administrator Teddy Sanders vetoes the maneuver, but Mitch Henderson secretly emails the details to the Hermes crew.
• All five of Watney's crewmates approve the plan and begin the maneuver after disabling remote overrides, leaving NASA no choice but to support them.
• The resupply ship docks with Hermes successfully, enabling the rescue.