New Frontiers: match a larger investigation to a science priority

NASA’s New Frontiers program supports focused planetary investigations at a larger resource scale than Discovery’s typical missions. Teams respond to an announcement of opportunity — open definition, and a principal investigator — open definition leads the proposed scientific investigation. The program connects competitive proposals to priorities established for planetary exploration; it is not an unrestricted invitation to build any desired spacecraft.

A proposal must balance the scientific questions, instruments, schedule and cost. The team includes the organizations that can develop the vehicle, operate it and interpret its data. The allowed mission themes and financial rules must be read in the relevant announcement. A historic selection framework is evidence of that competition, not an unchanging rule for every later round.

New Horizons launched in 2006 and flew past Pluto in July 2015. Its close observations revealed diverse terrain, including the cratered and layered landscape in this lesson’s image. The spacecraft later encountered the Kuiper Belt object Arrokoth in 2019. A flyby can provide detailed measurements along a carefully planned path, but it cannot continuously revisit the target like an orbiter.

Juno launched in 2011 and entered Jupiter orbit in 2016 to investigate the planet’s structure and origins. OSIRIS-REx launched in 2016, collected material from Bennu in 2020 and delivered its sample capsule to Earth in September 2023. Laboratory studies can use techniques that are difficult to fly, while still facing the question of how a collected sample represents the larger asteroid.

New Frontiers is the program; New Horizons is one mission within it. Similar names should not collapse the two identities. The missions share a selection framework without sharing one destination or one method. Their archived data, peer-reviewed findings and trained teams are part of the program’s return as well as the spacecraft encounters themselves.

Consider a fictional proposal that needs repeated measurements of a changing atmosphere. A single flyby and a long-lived orbiter would supply different evidence. A useful comparison states what each architecture can measure, what it misses, and how those limits affect the science objective. Larger scope does not make uncertainty disappear or guarantee that every selected objective will be achieved.