Hopper
From Kerbal Space Program Wiki
A Hopper is a type of spacecraft of smaller size. Hoppers vary in size, shape and power, although the most common type of Hopper, taught in the tutorial "Construction Basics", is comprised of an Mk1 Command Pod, a RT-5 "Flea" Solid Fuel Booster, and an Mk16 Parachute. The Hopper is referenced many times throughout the games, including a large number of the training tutorials.
The main purpose of a Hopper is to fly between biomes of a planet.
