Enceladus Life Signatures and Habitability

Artist's impression of possible hydrothermal activity on Enceladus

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Enceladus Life Signatures and Habitability (ELSAH) is an astrobiology concept mission proposed in 2017 to NASA's New Frontiers program to send a spacecraft to Enceladus to search for biosignatures and assess its habitability.^[1]^[2] The Principal Investigator is Christopher P. McKay, an astrobiologist at NASA Ames Research Center,^[3] and the managing NASA center is Goddard Space Flight Center. No details of the mission have been made public, but observers speculate that it would be a plume-sampling orbiter mission.^[4]

The two finalists, announced on 20 December 2017, are Dragonfly to Titan, and CAESAR (Comet Astrobiology Exploration Sample Return) which is a sample-return mission from comet 67P/Churyumov–Gerasimenko.^[5]

Although ELSAH was not selected for launch in this instance, it received technology development funds to prepare it for future mission competitions.^[6] The funds are meant to develop techniques that limit spacecraft contamination and thereby enable life detection measurements on cost-capped missions.^[6]

References

^ "Proposed New Frontiers Missions". Future Planetary Exploration. 4 August 2017. Archived from the original on 20 September 2017. Retrieved 2025-08-05.
^ McIntyre, Ocean (17 September 2017). "Cassini: The legend and legacy of one of NASA's most prolific missions". Spaceflight Insider. Archived from the original on 20 September 2017. Retrieved 2025-08-05.
^ Chang, Kenneth (15 September 2017). "Back to Saturn? Five Missions Proposed to Follow Cassini". The New York Times. Retrieved 2025-08-05.
^ Back to Saturn? NASA Eyes Possible Return Mission as Cassini Ends. Mike Wall. Space. 17 September 2017.
^ NASA's New Frontier Mission Will Search For Alien Life Or Reveal The Solar System's History. Elana Glowatz, IB Times. 20 December 2017.
^ ^a ^b NASA Invests in Concept Development for Missions to Comet, Saturn Moon Titan. NASA News. 20 December 2017.

[2017_Proposals-1] "Proposed New Frontiers Missions". Future Planetary Exploration. 4 August 2017. Archived from the original on 20 September 2017. Retrieved 2025-08-05.

[2] McIntyre, Ocean (17 September 2017). "Cassini: The legend and legacy of one of NASA's most prolific missions". Spaceflight Insider. Archived from the original on 20 September 2017. Retrieved 2025-08-05.

[3] Chang, Kenneth (15 September 2017). "Back to Saturn? Five Missions Proposed to Follow Cassini". The New York Times. Retrieved 2025-08-05.

[4] Back to Saturn? NASA Eyes Possible Return Mission as Cassini Ends. Mike Wall. Space. 17 September 2017.

[ibtimes-5] NASA's New Frontier Mission Will Search For Alien Life Or Reveal The Solar System's History. Elana Glowatz, IB Times. 20 December 2017.

[tech_funding-6] NASA Invests in Concept Development for Missions to Comet, Saturn Moon Titan. NASA News. 20 December 2017.

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See also

References