European radioisotope thermoelectric generators (RTGs) and radioisotope heater units (RHUs) for space science and exploration

RM Ambrosi, H Williams, EJ Watkinson, A Barco… - Space Science …, 2019 - Springer
Radioisotope power systems utilising americium-241 as a source of heat have been under
development in Europe as part of a European Space Agency funded programme since …

The interiors of Uranus and Neptune: current understanding and open questions

R Helled, JJ Fortney - Philosophical Transactions of the …, 2020 - royalsocietypublishing.org
Uranus and Neptune form a distinct class of planets in our Solar System. Given this fact, and
ubiquity of similar-mass planets in other planetary systems, it is essential to understand their …

Uranus evolution models with simple thermal boundary layers

N Nettelmann, K Wang, JJ Fortney, S Hamel… - Icarus, 2016 - Elsevier
The strikingly low luminosity of Uranus (T eff≃ T eq) constitutes a long-standing challenge to
our understanding of Ice Giant planets. Here we present the first Uranus structure and …

QUEST: A New Frontiers Uranus orbiter mission concept study

S Jarmak, E Leonard, A Akins, E Dahl, DR Cremons… - Acta Astronautica, 2020 - Elsevier
The ice giant planets, Uranus and Neptune, are fundamentally different from the gas giant
and terrestrial planets. Though ice giants represent the most common size of exoplanet and …

Empirical structure models of Uranus and Neptune

BA Neuenschwander, R Helled - Monthly Notices of the Royal …, 2022 - academic.oup.com
Uranus and Neptune are still poorly understood. Their gravitational fields, rotation periods,
atmosphere dynamics, and internal structures are not well determined. In this paper, we …

Ice Giant Systems: The scientific potential of orbital missions to Uranus and Neptune

LN Fletcher, R Helled, E Roussos, G Jones… - Planetary and Space …, 2020 - Elsevier
Uranus and Neptune, and their diverse satellite and ring systems, represent the least
explored environments of our Solar System, and yet may provide the archetype for the most …

Neptune odyssey: A flagship concept for the exploration of the neptune–triton system

AM Rymer, KD Runyon, B Clyde… - The Planetary …, 2021 - iopscience.iop.org
Abstract The Neptune Odyssey mission concept is a Flagship-class orbiter and atmospheric
probe to the Neptune–Triton system. This bold mission of exploration would orbit an ice …

Thermochemistry and vertical mixing in the tropospheres of Uranus and Neptune: How convection inhibition can affect the derivation of deep oxygen abundances

T Cavalié, O Venot, F Selsis, F Hersant, P Hartogh… - Icarus, 2017 - Elsevier
Thermochemical models have been used in the past to constrain the deep oxygen
abundance in the gas and ice giant planets from tropospheric CO spectroscopic …

Ab initio calculation of thermodynamic potentials and entropies for superionic water

M French, MP Desjarlais, R Redmer - Physical Review E, 2016 - APS
We construct thermodynamic potentials for two superionic phases of water [with body-
centered cubic (bcc) and face-centered cubic (fcc) oxygen lattice] using a combination of …

Ice giant system exploration in the 2020s: an introduction

LN Fletcher, AA Simon… - … of the Royal …, 2020 - royalsocietypublishing.org
The international planetary science community met in London in January 2020, united in the
goal of realizing the first dedicated robotic mission to the distant ice giants, Uranus and …