Is there such a thing as a biosignature?

C Malaterre, IL Ten Kate, M Baqué, V Debaille… - Astrobiology, 2023 - liebertpub.com
The concept of a biosignature is widely used in astrobiology to suggest a link between some
observation and a biological cause, given some context. The term itself has been defined …

Sustained and comparative habitability beyond Earth

CS Cockell, M Simons, J Castillo-Rogez… - Nature …, 2024 - nature.com
Although we have a reasonable understanding of the physical and chemical conditions
required to support the growth and reproduction of organisms, we still have only a …

JWST molecular map** and characterization of Enceladus' water plume feeding its torus

GL Villanueva, HB Hammel, SN Milam, V Kofman… - Nature …, 2023 - nature.com
Enceladus is a prime target in the search for life in our Solar System, having an active plume
that is likely to be connected to a large liquid water sub-surface ocean. Using the sensitive …

How to identify cell material in a single ice grain emitted from Enceladus or Europa

F Klenner, J Bönigk, M Napoleoni, J Hillier… - Science …, 2024 - science.org
Icy moons like Enceladus, and perhaps Europa, emit material sourced from their subsurface
oceans into space via plumes of ice grains and gas. Both moons are prime targets for …

The science case for a return to Enceladus

ML Cable, C Porco, CR Glein… - The planetary …, 2021 - iopscience.iop.org
The plume of Enceladus is unique in the solar system in providing direct access to fresh
material from an extraterrestrial subsurface ocean. The Cassini Mission, though not …

Chemical fractionation modeling of plumes indicates a gas-rich, moderately alkaline Enceladus ocean

LM Fifer, DC Catling, JD Toner - The Planetary Science Journal, 2022 - iopscience.iop.org
Enceladus harbors an ocean beneath its ice crust that erupts spectacular plumes from
fissures at the south pole. The plume composition was measured by the Cassini spacecraft …

Volcanically hosted venting with indications of ultramafic influence at Aurora hydrothermal field on Gakkel Ridge

CR German, EP Reeves, A Türke, A Diehl… - Nature …, 2022 - nature.com
Abstract The Aurora hydrothermal system, Arctic Ocean, hosts active submarine venting
within an extensive field of relict mineral deposits. Here we show the site is associated with a …

Science objectives for flagship-class mission concepts for the search for evidence of life at Enceladus

SM MacKenzie, M Neveu, AF Davila, JI Lunine… - Astrobiology, 2022 - liebertpub.com
Cassini revealed that Saturn's Moon Enceladus hosts a subsurface ocean that meets the
accepted criteria for habitability with bio-essential elements and compounds, liquid water …

Planetary mass spectrometry for agnostic life detection in the Solar System

L Chou, P Mahaffy, M Trainer, J Eigenbrode… - Frontiers in Astronomy …, 2021 - frontiersin.org
For the past fifty years of space exploration, mass spectrometry has provided unique
chemical and physical insights on the characteristics of other planetary bodies in the Solar …

Determining the “biosignature threshold” for life detection on biotic, abiotic, or prebiotic worlds

LM Barge, LE Rodriguez, JM Weber, BP Theiling - Astrobiology, 2022 - liebertpub.com
The field of prebiotic chemistry has demonstrated that complex organic chemical systems
that exhibit various life-like properties can be produced abiotically in the laboratory …