Advanced Concepts (NIAC) program. The report, written by principal investigator Stephanie Thomas of Princeton Satellite Systems, Inc., describes a Direct Fusion Drive (DFD) mission to Pluto. A fusion reactor would be used to send a 1000 kg orbiter and lander to the Pluto system in only four years (more than twice as fast as New Horizons). Pluto Hop, Skip, and Jump Global Aerospace Corporation presented a Pluto lander concept titled "Pluto Hop, Skip, and Jump" at the 2017 NIAC Symposium in Denver, Colorado. The concept describes an entrycraft that would brake using the drag of Pluto's thin but highly spread-out atmosphere. Once on Pluto's surface, the vehicle would exploit Pluto's low gravity to hop between sites using propellant. This is similar to NASA's Triton Hopper concept for exploring Neptune's largest moon Triton. Persephone Another proposal submitted to NASA in 2020 is an orbital probe of the Pluto & Charon system, named "Persephone". It would be powered by 5 RTGs, contain several high-resolution cameras, and orbit for 3 years. A key goal would be to determine whether there is a subsurface ocean on Pluto. Estimated cost would be $3 billion. References Pluto Spaceflight Discovery and exploration of the Solar System