What was a significant advancement in rocketry attributed to Roger Bacon?

Roger Bacon is often credited with early advancements in the field of rocketry, particularly in the context of developing the understanding and use of gunpowder. The significant advancement attributed to him lies in the increased range of rockets, as he explored the properties of gunpowder and its applications. His experiments contributed to the development of more powerful propulsion methods, which directly influenced the range that rockets could achieve.

Bacon’s work inspired future innovators and laid foundational concepts leading to more sophisticated rocketry. While other advancements such as accuracy and military applications emerged later, Bacon's initial focus on harnessing explosive power primarily affected how far rockets could travel, marking a crucial step in the evolution of rocketry. The notion of the first steam engine is attributed to a different era in technological development and is not related to rocketry advancements during Bacon’s time.