Results 11 to 20 of about 3,283 (217)

The Tides of Enceladus' Porous Core [PDF]

Journal of Geophysical Research: Planets, 2022
AbstractThe inferred density of Enceladus' core, together with evidence of hydrothermal activity within the moon, suggests that the core is porous. Tidal dissipation in an unconsolidated core has been proposed as the main source of Enceladus' geological activity.
Rovira‐Navarro, Marc, Katz, Richard F., Liao, Yang, van der Wal, Wouter, Nimmo, Francis   +4 more
openaire   +8 more sources

The obliquity of Enceladus [PDF]

Icarus, 2016
The extraordinary activity at Enceladus' warm south pole indicates the presence of an internal global or local reservoir of liquid water beneath the surface. While Tyler (2009, 2011) has suggested that the geological activity and the large heat flow of Enceladus could result from tidal heating triggered by a large obliquity of at least 0.05°-0.1 ...
Baland, Rose-Marie, Yseboodt, Marie, Van Hoolst, Tim   +2 more
openaire   +3 more sources

A Recipe for the Geophysical Exploration of Enceladus

The Planetary Science Journal, 2021
Abstract Orbital geophysical investigations of Enceladus are critical to understanding its energy budget. In this paper, we identified key science questions for the geophysical exploration of Enceladus, answering which would support future assessment of Enceladus’ astrobiological potential.
Ermakov, Anton, Park, Ryan, Roa, Javier, Castillo-Rogez, Julie, Keane, James, Nimmo, Francis, Kite, Edwin, Sotin, Christophe, Lazio, T. Joseph W., Steinbrügge, Gregor, Howell, Samuel, Bills, Bruce, Hemingway, Douglas, Viswanathan, Vishnu, Tobie, Gabriel, Lainey, Valéry   +15 more
openaire   +5 more sources

Biological methane production under putative Enceladus-like conditions

Nature Communications, 2018
Many methanogenic archaea use H2 and CO2 to produce methane. Here, Taubner et al. show that Methanothermococcus okinawensis produces methane under conditions extrapolated for Saturn’s icy moon, Enceladus, and estimate that serpentinization may produce ...
Ruth-Sophie Taubner, Patricia Pappenreiter, Jennifer Zwicker, Daniel Smrzka, Christian Pruckner, Philipp Kolar, Sébastien Bernacchi, Arne H. Seifert, Alexander Krajete, Wolfgang Bach, Jörn Peckmann, Christian Paulik, Maria G. Firneis, Christa Schleper, Simon K.-M. R. Rittmann   +14 more
doaj   +3 more sources

The topography of Enceladus [PDF]

, 2010
The surface of Enceladus modeled so far has relief of not more than ~2 km both at small (10 km) and larger (100 km) scales. This suggests that the lithosphere has been at most only a few kilometers thick over its history. A stereo-derived height model of the region between Enceladus’ leading side and the Saturnfacing side (Fig.
Giese, B.
openaire   +2 more sources

Enceladus as a potential oasis for life: Science goals and investigations for future explorations [PDF]

, 2021
Enceladus is the first planetary object for which direct sampling of a subsurface water reservoir, likely habitable, has been performed. Over a decade of flybys and seven flythroughs of its watery plume, the Cassini spacecraft determined that Enceladus ...
Vance, S. (Steven), Schmidt, Juergen, Sotin, C. (Christophe), Hedman, M. (Matt), Usui, T. (Tomohiro), Nimmo, Francis, Jones, G. (Geraint), Van Hoolst, Tim, Choblet, G. (Gaël), Szopa, C. (Cyril), Barge, Laura, Vance, Steven, Bēhounková, Marie, Schmidt, J. (Jürgen), Saur, J. (Joachim), Sotin, Christophe, Soucek, Ondrej, Lainey, V. (Valery), Saur, Joachim, Choblet, Gaël, Olsson-Francis, Karen, Soucek, O. (Ondrej), Bēhounková, M. (Marie), MacKenzie, S. (Shannon), Van Hoolst, T. (Tim), Sekine, Y. (Yasuhito), Schmidt, Jürgen, Szopa, Cyril, Tobie, G., Neveu, Marc, Buch, Arnaud, Freissinet, Caroline, MacKenzie, Shannon, Shibuya, Takazo, Hedman, Matt, Freissinet, C. (Caroline), Mitri, G. (Giuseppe), Olsson-Francis, K. (Karen), Panning, M. (Mark), Postberg, F. (Frank), Čadek, Ondrej, Barge, Laura M., Panning, Mark, Lucchetti, A. (Alice), Tobie, G. (Gabriel), Lainey, Valery, Mitri, Giuseppe, Shibuya, T. (Takazo), Neveu, M. (Marc), Buch, A. (Arnaud), Postberg, Frank, Sekine, Yasuhito, Lucchetti, Alice, Barge, Laura M, Tobie, Gabriel, Usui, Tomohiro, Čadek, O. (Ondrej), Barge, L. M. (Laura M.), Camprubi, Eloi, Le Gall, Alice, Nimmo, F. (Francis), Jones, Geraint, Camprubi, E. (Eloi), Le Gall, A. (Alice)   +63 more
core   +1 more source

The Science Case for a Return to Enceladus [PDF]

, 2021
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 specifically designed for it, was able to take advantage of the plume to ...
Anbar, A., MacKenzie, Shannon M., Vera, J.-P.D., German, Christopher R., Eigenbrode, Jennifer, Wurz, P., German, Christopher, Hendrix, A.R., Waite, J.H., Glein, Christopher R., Spilker, L.J., McEwen, Alfred, Cable, Morgan, Anbar, Ariel, Wurz, Peter, Hunter Waite, J., Hofmann, A.E., Glein, C.R., Núnez, Jorge I., Hofmann, Amy E., Eigenbrode, J., Núñez, J., Porco, C., Neveu, Marc, Hoehler, Tori, de Vera, J. P., Spilker, Linda J., Núñez, Jorge, Cable, M.L., Eigenbrode, Jennifer L., Neveu, M., German, C.R., Helbert, Jörn, Hofmann, Amy, MacKenzie, S.M., Spilker, Linda, Porco, Carolyn, Hendrix, Amanda, Khawaja, N., Postberg, Frank, Postberg, F., Khawaja, Nozair, Cable, Morgan L., McEwen, A., Hoehler, T.M., Hoehler, Tori M., Hendrix, Amanda R., de Vera, Jean-Pierre, Helbert, J.   +48 more
core   +1 more source

The Case for a Return to Enceladus [PDF]

, 2021
The plume of Enceladus provides access to fresh material from a habitable, subsurface ocean. We summarize in this white paper the evidence for Enceladus’ ocean and its habitability, identify constraints and outstanding questions on the detectability of ...
McEwen, Alfred, Cable, Morgan, Anbar, Ariel, MacKenzie, Shannon M., Wurz, Peter, de Vera, Jean Pierre Paul, Eigenbrode, Jennifer L., Postberg, Frank, Helbert, Jörn, Núnez, Jorge I., Hofmann, Amy, Neveu, Marc, Hoehler, Tori, Glein, Christopher R., Spilker, Linda, Porco, Carolyn, Hendrix, Amanda, Waite, J. Hunter   +17 more
core   +1 more source

Survival strategies of an anoxic microbial ecosystem in Lake Untersee, a potential analog for Enceladus

Scientific Reports, 2022
Lake Untersee located in Eastern Antarctica, is a perennially ice-covered lake. At the bottom of its southern basin lies 20 m of anoxic, methane rich, stratified water, making it a good analog for Enceladus, a moon of Saturn.
Nicole Yasmin Wagner, Dale T. Andersen, Aria S. Hahn, Sarah Stewart Johnson   +3 more
doaj   +1 more source

The pH of Enceladus’ ocean [PDF]

Geochimica et Cosmochimica Acta, 2015
Observational data from the Cassini spacecraft are used to obtain a chemical model of ocean water on Enceladus. The model indicates that Enceladus' ocean is a Na-Cl-CO3 solution with an alkaline pH of ~11-12. The dominance of aqueous NaCl is a feature that Enceladus' ocean shares with terrestrial seawater, but the ubiquity of dissolved Na2CO3 suggests ...
Glein, Christopher, Baross, John, Waite, Hunter   +2 more
openaire   +2 more sources