without+ballast
131Northern Ireland — This article is about the country. For other uses, see Northern Ireland (disambiguation). Northern Ireland Tuaisceart Éireann Norlin Airlann …
132Gravity assist — In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist or swing by is the use of the relative movement and gravity of a planet or other celestial body to alter the path and speed of a spacecraft, typically in… …
