The Ocean Worlds Exploration Program is a NASA program to explore ocean worlds in the outer Solar System that could possess subsurface oceans to assess their habitability and to seek biosignatures of
Two possible models of Europa
Artist's impression of possible hydrothermal activity on Enceladus's ocean floor
Trident (spacecraft)
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Trident was a space mission concept to explore the outer planets proposed in 2019 to NASA's Discovery Program. The concept included flybys of Jupiter and Neptune with a focus on Neptune's largest moon
Ocean Worlds Exploration Program
…Dragonfly mission to Titan. The program is also supporting concept studies for a proposed Europa Lander, and a concept to explore the moon Triton with Trident, a mission selected as a finalist in NASA's Discovery Program in 2020. Astrobiology mission concepts to water worlds in the outer Solar System…
Comparison of two designs for Trident
Neptune Moon Triton - Proposed Trident Mission (16 June 2020)
Venus (flyby)
Earth (3x flybys)