Future missions to Saturn and its moons
The only approved future mission to the Saturn system is NASA's Dragonfly, a rotorcraft targeted to launch in July 2028 and reach Titan in 2034. Everything else is still a concept: the NASA Enceladus Orbilander, recommended by the US planetary decadal survey in 2022, and a large ESA mission to Enceladus that is in early study for launch no earlier than the 2040s. No new Saturn orbiter has been funded since Cassini ended in 2017.
Contents
How missions get from idea to launch
A planetary mission passes through several stages before it flies, and confusing them is the most common error in news coverage.
- Concept. A team or an agency study describes a mission, its instruments and its cost. Thousands of such studies exist.
- Recommendation or selection for study. In the United States, the National Academies publish a decadal survey that ranks priorities. In Europe, ESA's long-term plan, Voyage 2050, sets themes for its large (L-class) missions. Being recommended is not the same as being funded.
- Selection. An agency picks a mission, often through a competition, as NASA did for Dragonfly in 2019.
- Confirmation and adoption. The design, budget and schedule are formally approved. Only then does building start.
On this page, only Dragonfly has passed all four stages.
Approved: Dragonfly
Dragonfly is an eight-rotor, nuclear-powered lander built by the Johns Hopkins Applied Physics Laboratory. It will hop between sites on Titan, from the Shangri-La dunes toward Selk crater, analyzing organic material. NASA confirmed it for construction in April 2024. Its launch date has already slipped twice, from 2026 to 2027 and then to July 2028.
Concept: Enceladus Orbilander (NASA)
The National Academies' decadal survey Origins, Worlds, and Life (2022), which sets NASA's planetary priorities for 2023–2032, recommended the Enceladus Orbilander as the second-highest priority for a new flagship mission, after a Uranus orbiter and probe.
The concept, studied at the Applied Physics Laboratory, would orbit Enceladus for about a year and a half, flying repeatedly through the south polar plumes to sample ocean material, then land near the tiger stripes for about two years of surface work. Its instruments would look for multiple, independent lines of evidence for life in fresh plume fallout. The study assumed a launch in the late 2030s and arrival around 2050.
Status: a recommended concept, not an approved or funded mission. Its timeline depends on NASA budgets, which came under strong pressure in the mid-2020s, and on the Uranus mission going first.
Concept: ESA's large mission to Enceladus
ESA's Voyage 2050 plan, published in 2021, named "moons of the giant planets" as the theme of a future L-class mission, the largest category in its science program. In 2024, an ESA expert committee recommended Enceladus as the destination, favoring an orbiter combined with a lander, and pointing to the ocean's habitability and the accessibility of its material through the plumes.
Status: in early study. The mission is not yet adopted, has no fixed design or budget, and would launch no earlier than the 2040s, with arrival in the 2050s. European laboratories, including French teams with experience from the Huygens and Cassini instruments, are among the groups contributing to the science case.
Smaller concepts that keep coming back
- Saturn atmospheric probe. A probe that would parachute into Saturn's atmosphere to measure helium, noble gases and isotopes directly, the key data for understanding how the planet formed. It has appeared repeatedly on NASA's list of New Frontiers themes. The Grand Finale sampled only the extreme upper atmosphere.
- Enceladus multiple-flyby mission. A cheaper alternative to an orbiter, sampling the plumes during repeated flybys of Enceladus while orbiting Saturn. Also on the New Frontiers theme list.
- Privately funded studies. Organizations such as the Breakthrough Initiatives have funded studies of low-cost life-search missions to Enceladus. None has a launch commitment.
The next New Frontiers competition, the most likely route for these medium-class missions, had been repeatedly delayed by the mid-2020s.
Proposals that were not selected
| Proposal | Agency or program | Target | Outcome |
|---|---|---|---|
| Titan Saturn System Mission (TSSM) | NASA and ESA flagship study, 2008–2009 | Titan orbiter, balloon and lake lander | Jupiter mission chosen instead, which led to ESA's JUICE |
| Titan Mare Explorer (TiME) | NASA Discovery finalist, 2012 | Capsule floating on Ligeia Mare | Not selected; InSight chosen |
| Explorer of Enceladus and Titan (E2T) | ESA M5 proposal, 2016 | Flybys of both moons | Not selected |
| Enceladus Life Finder (ELF) | NASA Discovery proposal, 2015 | Plume sampling flybys | Not selected |
These studies were not wasted. Instrument concepts and lessons from them shaped Dragonfly and the Orbilander, and the TiME idea of a floating capsule on Titan's seas remains popular among researchers.
Why the gap since Cassini?
Saturn missions are long and costly. A flagship mission costs several billion dollars, needs a radioisotope power source because sunlight is too weak, and takes six to eight years to arrive, so a mission recommended in the 2020s yields data only in the 2040s or 2050s. Meanwhile, telescopes like Hubble and Webb keep monitoring Saturn from afar. The Saturn timeline puts these plans in historical perspective.
FAQ
Is there a mission going to Saturn?
Yes, one: NASA's Dragonfly, targeted to launch in July 2028 and land on Titan in 2034. There is currently no approved mission to orbit Saturn itself or to visit Enceladus.
What is the Enceladus Orbilander?
A NASA flagship mission concept that would orbit Enceladus to sample its plumes and then land on its surface to search for signs of life. It was recommended by the 2022 decadal survey but has not been approved or funded.
Is ESA sending a mission to Enceladus?
ESA is studying one. An expert committee recommended Enceladus in 2024 for a future large mission, likely an orbiter with a lander, but it is not adopted and would not launch before the 2040s.
When will humans go to Saturn?
No crewed mission to Saturn is planned or studied in any serious program. The distance, the travel time of many years and radiation make it far beyond current capabilities.
Sources
- National Academies of Sciences, Engineering, and Medicine, Origins, Worlds, and Life: A Decadal Strategy for Planetary Science and Astrobiology 2023–2032, 2022
- ESA: Voyage 2050
- Johns Hopkins APL: Dragonfly
- MacKenzie, S. M. et al., "The Enceladus Orbilander mission concept", The Planetary Science Journal 2, 2021