Late in the evening of May 7, glowing lights filled the sky. What were they?
NASA has a huge arsenal of equipment set up to monitor the Earth's atmosphere. Satellites, balloons bearing instruments and ground devices all take up to 30 million observations every day. That alone provides interesting and important data but they are just pieces of the puzzle; a complete picture of all the activity in the Earth's atmosphere is only visible after the various data is layered together through climate modeling.