In ISRO’s POEM-2, 4th Stage Is Orbital Platform
Normally, the fourth stage of a rocket becomes a part of space debris orbiting the earth, or falls down to earth as junk, after releasing the satellites in their space orbitsBangalore: The Indian Space Research Organisation (ISRO) on Saturday for the first time used the fourth stage of its Polar Satellite Launch Vehicle as an orbital platform with deployed solar panels to carry out experiments