Space Force's mysterious X-37B begins 'aerobraking' to lower orbit. Here's how it works (video)

‘The U.S. military’s highly secretive X-37B space plane just got a little less mysterious.

In a rare show of openness about the space plane’s operations, Boeing and the U.S. Space Force released a statement last month explaining that the X-37B would soon begin a series of “aerobraking” maneuvers to begin lowering its orbit and safely disposing of unnecessary hardware before it comes down for a landing on Earth.

This week, Boeing Space released a video detailing how the aerobraking procedure will work and why the X-37B is performing it. In the video, a Boeing representative said the maneuver will help Boeing change the X-37B’s altitude and “safely dispose of the service module components in accordance with recognized standards for space debris mitigation.”

Artist rendering of the U.S. Space Force’s robotic X-37B conducting an aerobraking maneuver using the drag of Earth’s atmosphere. (Image credit: Boeing Space)

Typically, when satellites change orbit, they execute one or more burns using their onboard thrusters. This requires propellant, however, meaning each satellite can only perform a limited amount of burns before needing to be refueled or brought out of orbit. Aerobraking, on the other hand, uses the friction of Earth’s atmosphere to help guide a spacecraft to a new orbit.

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