New Horizons

A deep space probe, launched in January of 2006, sent to research Pluto, Charon, and other trans-neptunian objects. (TNOs) Reached Pluto in summer of 2016.

Have you seen the new pictures from New Horizons yet?

by Some weird nerd guy March 28, 2017

Reaction control system

Small rockets mounted on the sides of a rocket in many orientations; allows for fine maneuvering in space, especially useful for docking. Usually abbreviated RCS.

Let's shut down the main engine and complete the rendezvous with the reaction control system.

by Some weird nerd guy March 28, 2017