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View article: Exploring the Interior Structure and Mode of Tidal Heating in Enceladus
Exploring the Interior Structure and Mode of Tidal Heating in Enceladus Open
Enceladus is among the most intriguing bodies in the solar system due to its astrobiological potential. Determining the extent and duration of habitability (i.e., sustained habitability ) requires characterizing the interior properties and…
View article: The complete genome sequence of the cluster BE1 <i>Streptomyces Bacteriophage Riptide</i> includes genes encoding ribosome-associated proteins
The complete genome sequence of the cluster BE1 <i>Streptomyces Bacteriophage Riptide</i> includes genes encoding ribosome-associated proteins Open
This study isolated bacteriophage Riptide , a BE1 cluster siphovirus, from soil using Streptomyces mirabilis NRRL B-2400. Riptide follows a lytic life cycle contains a genome length of 132,142 bp encoding 236 protein coding genes including…
View article: A Comprehensive Framework for Assessing Terrestrial Analogue Field Sites for Ocean Worlds
A Comprehensive Framework for Assessing Terrestrial Analogue Field Sites for Ocean Worlds Open
Field studies at terrestrial analogue sites represent an important contribution to the science of ocean worlds. The value of the science and technology investigations conducted at field analogue sites depends on the relevance of the analog…
View article: Hydrothermal and Tidal Energy Flux at Titan, Enceladus, and Europa
Hydrothermal and Tidal Energy Flux at Titan, Enceladus, and Europa Open
Cassini/INMS observations of Saturn’s largest moon Titan, a frigid world T0~ 94 K, hosting a terrestrial-like atmosphere composed predominantly of N2, strongly suggest a missing flux of H2 and CH4 gas in its ~ 1.4 bar atmosphere. Indeed, m…
View article: Strong Tidal Dissipation in the Interior of Titan Revealed by Cassini Data
Strong Tidal Dissipation in the Interior of Titan Revealed by Cassini Data Open
The Cassini spacecraft orbited Saturn from 2004 to 2017, performing over a hundred flybys of its largest moon, Titan. Ten of these flybys were dedicated to gravity field measurements, yielding unprecedented insight into the moon’s interior…
View article: Exploration of Joint Geophysical Inversion of Gravity and Magnetic data for Ocean World Habitability using PlanetProfile
Exploration of Joint Geophysical Inversion of Gravity and Magnetic data for Ocean World Habitability using PlanetProfile Open
Introduction: Combined gravity and magnetic induction measurements can characterize subsurface oceans in icy worlds [1, 2]. Joint inversion based on forward modeled geophysical data is a key tool to constrain the presence, thickness, and s…
View article: Heterosynaptic interactions between dorsal and ventral hippocampus in individual medium spiny neurons of the nucleus accumbens ventromedial shell
Heterosynaptic interactions between dorsal and ventral hippocampus in individual medium spiny neurons of the nucleus accumbens ventromedial shell Open
Establishing learned associations between rewarding stimuli and the context under which those rewards are encountered is critical for survival. Hippocampal input to the nucleus accumbens (NAc) is a key connection involved in integrating en…
View article: Exploring the Interior Structure and Mode of Tidal Heating in Enceladus
Exploring the Interior Structure and Mode of Tidal Heating in Enceladus Open
Enceladus is among the most intriguing bodies in the solar system due to its astrobiological potential. Determining the extent and duration of habitability (i.e., sustained habitability) requires characterizing the interior properties and …
View article: Gravity Imaging Radio Observer (GIRO) for Planetary Science and Mission Opportunities
Gravity Imaging Radio Observer (GIRO) for Planetary Science and Mission Opportunities Open
The Gravity Imaging Radio Observer (GIRO) is a concept for a high-performance, battery-powered radio probe designed to be released in the proximity of a target planetary body to study its gravitational variations. Using the host spacecraft…
View article: Supercooling, Glass Formation, and Mineral Assemblages upon Freezing of Salty Ice Grains from Enceladus’s Ocean
Supercooling, Glass Formation, and Mineral Assemblages upon Freezing of Salty Ice Grains from Enceladus’s Ocean Open
The analysis of micrometer-sized ice grains emitted into space by Saturn’s moon Enceladus suggests that the moon’s subsurface ocean may be habitable. However, the formation conditions of these ice grains are largely unknown. Upon cooling, …
View article: Identifying signatures of past and present cryovolcanism on Europa
Identifying signatures of past and present cryovolcanism on Europa Open
View article: Stronger Evidence of a Subsurface Ocean Within Callisto From a Multifrequency Investigation of Its Induced Magnetic Field
Stronger Evidence of a Subsurface Ocean Within Callisto From a Multifrequency Investigation of Its Induced Magnetic Field Open
The magnetometer investigation of the Galileo mission used the phenomenon of magnetic induction to produce the most compelling evidence that subsurface oceans exist within our solar system. Although there is high certainty that the induced…
View article: On detecting and characterizing planetary oceans in the solar system using a distance-based ensemble modelling approach: application to the Uranus system
On detecting and characterizing planetary oceans in the solar system using a distance-based ensemble modelling approach: application to the Uranus system Open
The discovery of Europa’s subsurface ocean has spawned a strong desire by the planetary community to return and assess the ocean’s habitability using the magnetic induction signal that Europa generates. NASA has since formulated and develo…
View article: Rapid Impact Crater Relaxation Caused by an Insulating Methane Clathrate Crust on Titan
Rapid Impact Crater Relaxation Caused by an Insulating Methane Clathrate Crust on Titan Open
Titan’s impact craters are hundreds of meters shallower than expected, compared to similar-sized craters on Ganymede. Only 90 crater candidates have been identified, the majority of which have low certainty of an impact origin. Many proces…
View article: Impacts on Ocean Worlds Are Sufficiently Frequent and Energetic to Be of Astrobiological Importance
Impacts on Ocean Worlds Are Sufficiently Frequent and Energetic to Be of Astrobiological Importance Open
Evidence for the beneficial role of impacts in the creation of urable or habitable environments on Earth prompts the question of whether meteorite impacts could play a similar role at other potentially urable/habitable worlds like Enceladu…
View article: Exploring the Composition of Europa with the Upcoming Europa Clipper Mission
Exploring the Composition of Europa with the Upcoming Europa Clipper Mission Open
Jupiter’s icy moon, Europa, harbors a subsurface liquid water ocean; the prospect of this ocean being habitable motivates further exploration of the moon with the upcoming NASA Europa Clipper mission. Key among the mission goals is a compr…
View article: Electrical Conductivity of Subsurface Ocean Analogue Solutions from Molecular Dynamics Simulations
Electrical Conductivity of Subsurface Ocean Analogue Solutions from Molecular Dynamics Simulations Open
Investigating the habitability of ocean worlds is a priority of current and future NASA missions. The Europa Clipper mission will conduct approximately 50 flybys of Jupiter's moon Europa, returning a detailed portrait of its interio…
View article: Tidal Seismicity in the Moon and Implications for the Rocky Interior of Europa
Tidal Seismicity in the Moon and Implications for the Rocky Interior of Europa Open
Seismology is a powerful tool for probing the deep interiors of planetary bodies. Just as deep moonquakes triggered by Earth’s tides occur on the Moon, as observed by the Apollo seismometers, icy moons of the giant planets may also have se…
View article: Science Overview of the Europa Clipper Mission
Science Overview of the Europa Clipper Mission Open
The goal of NASA’s Europa Clipper mission is to assess the habitability of Jupiter’s moon Europa. After entering Jupiter orbit in 2030, the flight system will collect science data while flying past Europa 49 times at typical closest approa…
View article: Exploring the tidal responses of ocean worlds with PyALMA
Exploring the tidal responses of ocean worlds with PyALMA Open
View article: Cryovolcanism inside out: Signatures of past and present cryovolcanism on Europa
Cryovolcanism inside out: Signatures of past and present cryovolcanism on Europa Open
Introduction. Europa, the most visibly active icy moon of Jupiter, is a prime target for the search for life in the outer solar system. Two spacecraft missions, Europa Clipper from the National Aeronautics and Space Administration (NASA) a…
View article: Formation of chemically stratified layer in Ganymede&#8217;s ocean: implications for upcoming JUICE mission
Formation of chemically stratified layer in Ganymede’s ocean: implications for upcoming JUICE mission Open
Chemically stratified layers in the deep oceans of icy moons may strongly influence the oceans’ dynamics, thermal and chemical evolution, and therefore their habitability. Such layers can form during the differentiation of the refrac…
View article: Oxygen production from dissociation of Europa’s water-ice surface
Oxygen production from dissociation of Europa’s water-ice surface Open
View article: Publisher Correction: Sustained and comparative habitability beyond Earth
Publisher Correction: Sustained and comparative habitability beyond Earth Open
View article: The Global Shape, Gravity Field, and Libration of Enceladus
The Global Shape, Gravity Field, and Libration of Enceladus Open
In order to improve our understanding of the interior structure of Saturn's small moon Enceladus, we reanalyze radiometric tracking and onboard imaging data acquired by the Cassini spacecraft during close encounters with the moon. We compu…
View article: Investigating Europa’s Habitability with the Europa Clipper
Investigating Europa’s Habitability with the Europa Clipper Open
View article: Low-Temperature Specific Heat Capacity of Water–Ammonia Mixtures Down to the Eutectic
Low-Temperature Specific Heat Capacity of Water–Ammonia Mixtures Down to the Eutectic Open
Robust thermodynamic data are essential for the development of geodynamic and geochemical models of ocean worlds. The water-ammonia system is of interest in the study of ocean worlds due to its purported abundance in the outer solar system…
View article: Salt Distribution from Freezing Intrusions in Ice Shells on Ocean Worlds: Application to Europa
Salt Distribution from Freezing Intrusions in Ice Shells on Ocean Worlds: Application to Europa Open
Several icy moons and dwarf planets appear to have hosted subsurface liquid water. Liquid water intruding upwards into the icy outer shells of these worlds freezes, forming ice and (from ocean solutes) non-ice solids. Here, we model concen…
View article: Characterization of Icy Moon Hydrospheres Through Joint Inversion of Gravity and Magnetic Field Measurements
Characterization of Icy Moon Hydrospheres Through Joint Inversion of Gravity and Magnetic Field Measurements Open
Several bodies in the outer solar system are believed to host liquid water oceans underneath their icy surfaces. Knowledge of the hydrosphere properties is essential for understanding and assessing their habitability. We introduce a method…
View article: Exploring the Interior of Europa with the Europa Clipper
Exploring the Interior of Europa with the Europa Clipper Open