A common way a robotic spacecraft can be accelerated and have its trajectory changed without the use of any fuel is via
A) a gravitational assist from another spacecraft
B) radiation pressure from the Sun
C) the ejection of mass from the probe
D) a gravitational assist from another planet

Question

Quizplus · Accepted Answer

A gravitational assist from another planet can change a spacecraft's speed and trajectory without using fuel by using the planet's gravity to slingshot the spacecraft.

A Common Way a Robotic Spacecraft Can Be Accelerated and Have