We extend an existing thermophysical activity model of comet 67P/Churyumov-Gerasimenko to include pressure buildup inside the pebbles making up the nucleus.
Comet
Posted inAstrochemistry, Astrogeology, Biosignatures & Paleobiology, Comets and Asteroids, Meteorites & Asteroids, Planetary Protection & Biosafety, Sample Return, Status Report
Astromaterials Data Archiving Announcement from the Astromaterials Data System
The Astromaterials Data System (Astromat) is the primary NASA-sponsored archive for laboratory analyses of returned samples (see NASA’s Planetary Science Division’s Information and Data Management Policy Supplement to SPD-41A).
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Press Release
Astrochemistry: Webb Reveals Unusual Jets of Volatile Gas from Icy Centaur 29P
Inspired by the half-human, half-horse creatures that are part of Ancient Greek mythology, the field of astronomy has its own kind of centaurs: distant objects orbiting the Sun between Jupiter […]
Posted inAI - Data - Apps - Cybernetics, Astrochemistry, Comets and Asteroids, Imaging & Spectroscopy, Status Report
Identification and Localization of Cometary Activity in Solar System Objects with Machine Learning
In this chapter, we will discuss the use of Machine Learning methods for the identification and localization of cometary activity for Solar System objects in ground and in space-based wide-field […]
Posted inAtmospheres, Climate, Weather, Comets and Asteroids, Exoplanets, -moons, -comets, Extinction events, Icy Worlds, Impact events
The Impact of Icy Cometary ‘Impacts’ on Exoplanetary Atmospheres I: Tidally-Locked Terrestrial Exoplanets
Impacts by rocky and icy bodies are thought to have played a key role in shaping the composition of solar system objects, including the Earth’s habitability. Hence, it is likely […]
Posted inAstrochemistry, Astrogeology, Comets and Asteroids, Meteorites & Asteroids, Status Report
Is There A Genetic Relationship Between Chondrules And Matrix?
Chondritic components such as chondrules and matrix are the key time capsules that can help us understand the evolution and dynamics of the protoplanetary disk from which the Solar System […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Comets and Asteroids, Imaging & Spectroscopy, Meteorites & Asteroids, Status Report
A Broad Set of Solar and Cosmochemical Data Indicates High C-N-O Abundances For Our Solar System
We examine the role of refractory organics as a major C carrier in the outer protosolar nebula and its implications for the compositions of large Kuiper belt objects (KBOs) and […]
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Status Report
Evidence for Surprising Heavy Nitrogen Isotopic Enrichment in Comet 46P/Wirtanen’s Hydrogen Cyanide
46P/Wirtanen is a Jupiter-family comet, probably originating from the Solar System’s Kuiper belt, that now resides on a 5.4 year elliptical orbit. During its 2018 apparition, comet 46P passed unusually […]
Posted inAstrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Comets and Asteroids, Icy Worlds, Press Release
Our Outer Solar System Is More Populated With Icy Worlds Than We Thought
Observations of the outer Solar System with the Subaru Telescope have discovered new bodies where none were expected. The new objects are likely members of a much larger population waiting […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Interstellar, Meteorites & Asteroids, Radiation, Status Report
Ice Chemistry Modeling of Active Phase Comets: Hale-Bopp
We present a chemical kinetics model of the solid-phase chemical evolution of a comet, beginning with a long period of cold-storage in the Oort Cloud, followed by five orbits that […]