India has docked two satellites in space to become the fourth nation in the world to achieve the mission in an ambitious milestone in the country’s expansion of space technology.

India on Thursday became the fourth country to successfully achieve an unmanned docking in space, a feat seen as pivotal for future missions as New Delhi cements its place as a global space power.

The two satellites of the Indian Space Research Organization 's (ISRO) Space Docking Experiment, or SpaDex, successfully met up in Earth orbit yesterday (Jan. 15), making India just the fourth country to pull off an in-space docking. The other three are all heavy hitters in the space game: the United States, Russia and China.