A 33-year-old Indian engineer named Shanmuga Subramanian had spotted debris from Chandrayaan 2's Vikram Lander on the Moon by comparing images released by NASA's Lunar Reconnaissance Orbiter. NASA gave credit to Subramanian for his discovery. "Congratulations for what I'm sure was a lot of time and effort on your part," a NASA scientist wrote in an e-mail to Subramanian.