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The Indian Space Research Organisation (ISRO) has transformed from a modest agency into a global space powerhouse. From discovering water on the Moon to reaching Mars in a single shot, these five missions represent the "Big Five" of Indian space exploration. 1. Chandrayaan-1 (2008): The Mission That Found Water Launched on October 22, 2008, Chandrayaan-1 was India's first step toward the Moon. While it was an orbiter mission, its impact was felt worldwide. The Breakthrough:  It provided the first conclusive evidence of  water molecules (H2O) and hydroxyl (OH)  on the lunar surface. Legacy:  This discovery shifted the global narrative of lunar exploration, turning the "dry" Moon into a potential base for future human colonies. 2. Mangalyaan (2013): First Attempt, Global Success The Mars Orbiter Mission (MOM) made India the first country in the world to reach Martian orbit on its  very first attempt . The "Bahubali" of Efficiency:  Costing on...