WBAY -  GREEN BAY, Wis. (WBAY) - Monday marks the annual observance of Earth Day, a day dedicated to our big blue marble was inspired in part by Wisconsin Senator Gaylord Nelson back in 1969 and first observed on April 22, 1970.
NASA is beginning to bring in information from this satellite, PACE, which was launched just two months ago. PACE stands for Plankton, Aerosol, Cloud, and Ocean Ecosystem and it was designed to detect particles in the ocean and air to help understand climate change.