What does the phrase ‘eureka moment’ in the passage refer to?

Directions: Read the following passage and answer the question that follows:

The history of human exploration has been an intriguing and an exciting one. It has moved from planet to planet, gone into space even in search of possibility of a life. The awe to find something new has always prevailed over silent wait. The urge for a “eureka moment” has grown magnanimously across countries in the world. On Jan 6, India also added another feather in its cap, when the Indian Space Research Organisation (ISRO) successfully launched the first raising operation of GSLV flight GSAT-14 communication satellite. The indigenous cryogenic upper stage was successfully flight tested on GSLV-D5 launch vehicle from the spaceport of Sriharikota in Andhra Pradesh, a feat that put India in the exclusive club of the US, Russia, France, Japan and China, which have mastered the cryogenic engine technology.
It will help the country to launch its INSAT satellites into geostationary orbit, which will in turn help India become less dependent on foreign satellites. The principal objective of the mission is to enhance the in-orbit capacity of extended C and Ku-band transponders and provide a platform for new experiments.
In addition, the earnings could be double once GSLV is accepted globally.