Rocket exhaust refers to the fiery gases expelled from a rocket engine during launch or propulsion. It blasts out of the rocket at high speeds, creating the force that pushes the rocket upwards into space. Full definition
And now imagine slowing it down, balancing it on a jet of rocket exhaust and landing it with an accuracy of 10 meters on a target smaller than a football field. (scientificamerican.com)
(The students did capture particles in space, but they turned out to be aluminum oxide spheres, produced by rocket exhaust.) (sciencemag.org)
Second, rocket exhaust from the lunar modules contains precursor molecules used to build amino acids (such as hydrogen cyanide or HCN). (sciencedaily.com)