Scientific discovery with the James Webb space telescope

J Kalirai - Contemporary Physics, 2018 - Taylor & Francis
For the past 400 years, astronomers have sought to observe and interpret the Universe by
building more powerful telescopes. These incredible instruments extend the capabilities of …

Endogenous CO2 ice mixture on the surface of Europa and no detection of plume activity

GL Villanueva, HB Hammel, SN Milam, S Faggi… - Science, 2023 - science.org
Jupiter's moon Europa has a subsurface ocean beneath an icy crust. Conditions within the
ocean are unknown, and it is unclear whether it is connected to the surface. We observed …

Planetary Spectrum Generator: An accurate online radiative transfer suite for atmospheres, comets, small bodies and exoplanets

GL Villanueva, MD Smith, S Protopapa, S Faggi… - Journal of Quantitative …, 2018 - Elsevier
We have developed an online radiative-transfer suite (https://psg. gsfc. nasa. gov) applicable
to a broad range of planetary objects (eg, planets, moons, comets, asteroids, TNOs, KBOs …

Strong water isotopic anomalies in the martian atmosphere: Probing current and ancient reservoirs

GL Villanueva, MJ Mumma, RE Novak, HU Käufl… - Science, 2015 - science.org
We measured maps of atmospheric water (H2O) and its deuterated form (HDO) across the
martian globe, showing strong isotopic anomalies and a significant high …

JWST molecular mapping 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 …

A measurement of water vapour amid a largely quiescent environment on Europa

L Paganini, GL Villanueva, L Roth, AM Mandell… - Nature …, 2020 - nature.com
Previous investigations proved the existence of local density enhancements in Europa's
atmosphere, advancing the idea of a possible origination from water plumes. These …

Spectroscopic identification of water emission from a main-belt comet

MSP Kelley, HH Hsieh, D Bodewits, M Saki… - Nature, 2023 - nature.com
Main-belt comets are small Solar System bodies located in the asteroid belt that repeatedly
exhibit comet-like activity (that is, dust comae or tails) during their perihelion passages …

The deuterium isotopic ratio of water released from the Martian caps as measured with TGO/NOMAD

GL Villanueva, G Liuzzi, S Aoki… - Geophysical …, 2022 - Wiley Online Library
We report vertical profiles of water and D/H for one Martian year as measured with the
TGO/NOMAD instrument. The observations were performed via solar occultation, providing …

Water heavily fractionated as it ascends on Mars as revealed by ExoMars/NOMAD

GL Villanueva, G Liuzzi, MMJ Crismani, S Aoki… - Science …, 2021 - science.org
Isotopic ratios and, in particular, the water D/H ratio are powerful tracers of the evolution and
transport of water on Mars. From measurements performed with ExoMars/NOMAD, we …

The surface distributions of the production of the major volatile species, H2O, CO2, CO and O2, from the nucleus of comet 67P/Churyumov-Gerasimenko throughout …

M Combi, Y Shou, N Fougere, V Tenishev, K Altwegg… - Icarus, 2020 - Elsevier
Abstract The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) suite of
instruments operated throughout the over two years of the Rosetta mission operations in the …