
ALT Photograph of students in Argentina collecting cloud observations and temperature data to upload through the GLOBE Eclipse tool during the eclipse that crossed South America on July 2, 2019. Three students wearing eclipse glasses can be seen looking at the sky. They are sitting on a low hill and the sky is blue behind them. A tall scientific instrument next to them collects weather data. Credit: Pablo Cecchi

ALT Map of the Washington, Philadelphia and New York region. Colors indicate density of nitrogen dioxide as measured by the TEMPO satellite on Aug. 2, 2023 shortly after noon Eastern. Most of the area is blue, indicating low levels of the pollutant. There are dark purple and red blobs near Washington and New York, indicating higher pollution, as well as a line of higher pollution stretching between the cities along the I-95 corridor. Credits: Kel Elkins, Trent Schindler, and Cindy Starr/NASA's Scientific Visualization Studio


























