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A student makes light pollution visible with a phone photo
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A student makes light pollution visible with a phone photo

When Gurugram student Suhani Gupta noticed how few stars she could see at home, she began investigating light pollution. She taught herself image processing and built SkyQi, a free website that estimates night-sky quality from smartphone photos and invites people around the world to contribute observations. Using NASA satellite data, she also found that measured night-time radiance rose in 47 of 50 Indian cities between 2015 and 2025, with the median increase reaching 70%. Her work helps make a gradual, often overlooked environmental change easier for people to notice and understand.
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