GALAH Archives

We show the total surface flooding for a given topography as a function of Mg/Si and FeO for a 1 M⊕ planet with Earth-like molar ratios (i.e., Fe/Mg, Ca/Mg, Al/Mg). We use cubic interpolation between data points for smoothing. The colorbar indicates the surface flooding in Earth oceans. We show the compositions of solar system planets with the following notation: Earth (⊕), Venus (♀), Mars (♂), Mercury ('), using compositional values from R. G. Trønnes et al. (2019). (A) Earth-like topography shows three distinct ”islands” correspond to the increase in water storage capacity. (B) Venus-like and (C) Mars-like topographies show similar structure in the water coverage fraction. (D) Mercury-like topography reaches complete flooding at low OM. -- astro-ph.EP

Astrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Icy Worlds, Status Report, Water/Hycean Worlds & Oceanography

From Underground Oceans To Continents: A Glimpse Into The Water Inventory On Rocky Planets Using Host Star Abundances

by Keith CowingOctober 31, 2025October 31, 2025

The amount of surface water is thought to be critical for a planet’s climate stability and thus habitability.

Astrochemistry, Astrogeology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

How The Origin Of Stars In The Galaxy Impacts The Composition Of Planetary Building Blocks

by Keith CowingJanuary 16, 2023January 16, 2023

Context. Our Galaxy is composed of different stellar populations with varying chemical abundances, which are thought to imprint the composition of planet building blocks (PBBs).

GALAH

From Underground Oceans To Continents: A Glimpse Into The Water Inventory On Rocky Planets Using Host Star Abundances

How The Origin Of Stars In The Galaxy Impacts The Composition Of Planetary Building Blocks

NASA Establishes Mars Forward Operational Risk and Contamination Evaluation (M-FORCE) Tiger Team to Shape Mars Planetary Protection Protocols

Opportunity to Contribute to NASA DARES Community White Paper on Phototrophic Biosignatures

The Search For Life Elsewhere: Avoiding Hype and Fostering Public Understanding

Panchromatic Spectra of Nearby Low-mass and Sun-like Stars with Directly Imageable Habitable Zones

Alfred: A Flexible, User-Friendly Python Package for Exoplanet Confirmation