A little more than three months ago the Indian space agency, ISRO, achieved a major success by putting its Vikram lander safely down on the surface of the Moon. In doing so India became the fourth country to achieve a soft landing on the Moon, and this further ignited the country’s interest in space exploration.

But it turns out that is not the end of the story for the Chandrayaan 3 mission. In a surprise announcement made Monday, ISRO announced that it has successfully returned the propulsion module used by the spacecraft into a high orbit around Earth. This experimental phase of the mission, the agency said in a statement, tested key capabilities needed for future lunar missions, including the potential for returning lunar rocks to Earth.