“We want to know how our planet works, how we affect it, and how it might change in the future,” NASA Administrator Charles Bolden wrote. “Knowledge is a powerful tool & with it we can all be better stewards of our home planet.”
Children and parents were able to learn about NASA research and satellites, and as Spaceflight Insider reporter Josh Tallis wrote, “Throughout the pavilion, NASA representatives stood huddled over speaking to enraptured children. To them, during an afternoon punctuated by world-famous performers, they could have been rock stars too.”
Further Reading:
+ NASA Among ‘Rock Stars’ at D.C. Earth Day Concert, Spaceflight Insider
+ Flickr photo collection: Global Citizen Earth Day Celebration, April 17, 18, 21, and 22, 2015. Washington, D.C., National Mall and Union Station

STELLA: A DIY Handheld Scientific Instrument
If you are looking for a do-it-yourself (DIY) handheld spectrometer, you need to meet STELLA. STELLA (Science and Technology Education for Land/Life Assessment) is a portable scientific instrument developed by