In order to further explore our solar system, NASA has chosen four proposals for missions that would investigate Venus, Jupiter's moon Io and Neptune's moon Trident. If chosen, NASA would develop the missions.
원문출처 : https://www.cnn.com/2020/02/14/world/nasa-discovery-program-mission-proposals-scn/index.html
원문출처 : https://www.cnn.com/2020/02/14/world/nasa-discovery-program-mission-proposals-scn/index.html