Results 31 to 40 of about 3,316 (179)

TRAPPED‐S, a New Environment Model Framework for Saturn: Focus on Radiation‐Specification Model

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract As space agencies contemplate missions to the outer planets' systems and moons, entailing prolonged observations via local orbiters or potential landers, meticulous assessment of the local environment—encompassing radiation and plasma conditions—is paramount for the design of both the platform and scientific payload.
A. Sicard, E. Roussos, K. Dialynas, Y. Hao, Q. Nénon, P. Jiggens, F. L. Johansson, A. Kamran   +7 more
wiley   +1 more source

The Potential for Organic Synthesis in the Ocean of Enceladus

The Astrophysical Journal
The Cassini spacecraft detected a soup of organics in the plume of Saturn’s moon Enceladus. Those compounds could provide building blocks for the potential emergence or sustenance of microbial life in Enceladus’ subsurface ocean. However, the sources and
Can Liu, Weiming Xu, Zongbin Zhang, Kirt Robinson, Maggie Lau, Fang Huang, Fang Huang, Christopher R. Glein, Jihua Hao   +8 more
doaj   +1 more source

Effects of Mineralogy and UV Radiation on the Detectability of Amino Acids Within the Martian Regolith: The Case for a Combined Chromatographical and Spectroscopical Approach

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract Amino acids are an extremely heterogeneous group of biomolecules essential for life on Earth. Their biosignatures are expected to be easily degraded on the Martian surface as the absence of a thick atmosphere and a magnetosphere leads to most of the solar radiation directly reaching its surface.
Miguel Arribas Tiemblo, Pedro Rayo, María‐Paz Martín‐Redondo, Felipe Gómez   +3 more
wiley   +1 more source

Cassini UVIS Observations of the Enceladus Auroral Footprint on Saturn in 2017

The Planetary Science Journal
Ultraviolet Imaging Spectrograph (UVIS) observations show the Enceladus auroral footprint on Saturn on 2017 September 14, near the end of the Cassini mission.
Wayne R. Pryor, Fabiola P. Magalhães, Laurent Lamy, Renée Prangé, Larry W. Esposito, Jacques Gustin, Abigail M. Rymer, Ali H. Sulaiman   +7 more
doaj   +1 more source

Comparing Jupiter and Saturn: dimensionless input rates from plasma sources within the magnetosphere [PDF]

Annales Geophysicae, 2008
The quantitative significance for a planetary magnetosphere of plasma sources associated with a moon of the planet can be assessed only by expressing the plasma mass input rate in dimensionless form, as the ratio of the actual mass input to some ...
V. M. Vasyliūnas
doaj   +1 more source

Blocks Size Frequency Distribution in the Enceladus Tiger Stripes Area: Implications on Their Formative Processes

Universe, 2021
We study the size frequency distribution of the blocks located in the deeply fractured, geologically active Enceladus South Polar Terrain with the aim to suggest their formative mechanisms.
Maurizio Pajola, Alice Lucchetti, Lara Senter, Gabriele Cremonese   +3 more
doaj   +1 more source

A Specification Model of Saturn's Plasma Environment

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract We present the first empirical‐based specification model of Saturn's plasma environment based on the analysis of all publicly available plasma moment data sets derived using multiple techniques from Cassini observations made by the Cassini Plasma Spectrometer and the Radio and Plasma Wave Science instrument.
A. Kamran, Q. Nénon, F. L. Johansson, Y. Hao, A. Sicard, E. Roussos, K. Dialynas, P. Jiggens, F. Cipriani   +8 more
wiley   +1 more source

Estimating the Initial Mass of the Gaia–Enceladus Dwarf Galaxy with a Chemical Evolution Model

The Astrophysical Journal
This work investigates the initial mass and chemical evolution history of the Gaia–Enceladus dwarf galaxy. We combine spectroscopic data from APOGEE with astrometric data from Gaia Data Release 3 to identify Gaia–Enceladus candidate stars via a machine ...
Olcay Plevne, Furkan Akbaba
doaj   +1 more source

Is Enceladus' plume tidally controlled?

Geophysical Research Letters, 2008
Explanations for the plume of gas, water vapor and ice particles jetting from rifts in Enceladus' south polar region include boiling of liquid water and dissociation of clathrate hydrates.
I. Halevy, S. T. Stewart
doaj   +1 more source

Contamination analysis of Arctic ice samples as planetary field analogs and implications for future life-detection missions to Europa and Enceladus

Scientific Reports, 2022
Missions to detect extraterrestrial life are being designed to visit Europa and Enceladus in the next decades. The contact between the mission payload and the habitable subsurface of these satellites involves significant risk of forward contamination ...
Lígia F. Coelho, Marie-Amélie Blais, Alex Matveev, Tina Keller-Costa, Warwick F. Vincent, Rodrigo Costa, Zita Martins, João Canário   +7 more
doaj   +1 more source