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Samples from asteroid Ryugu bear hydrated ammonium magnesium phosphorus (HAMP) grains, which have no known parallels to meteorite minerals but provide clues to the formation of Ryugu and suggest that asteroids supply bioessential elements.
Ceresâs surface is ice-rich and warm, so we expect craters to viscously flow. Yet most of Ceresâs craters are not shallow. A new model that includes a stronger, progressively dirtier icy crust, frozen from an ancient ocean, may reconcile this discrepancy.
Giant shock waves at the physical boundaries of the most massive structures in the Universe could be used as an accurate tool to measure the total mass of clusters of galaxies.
Most data for extrasolar rocky planets comes from observations of objects significantly larger than the Earth. The newly discovered SPECULOOS-3 b is a good target for efforts to characterize exoplanets closer in size to the solar system terrestrial planets.
Computer simulations based on the prevailing cosmological model, ÎCDM, reproduce many observed properties of our Universe. But a study of coherent satellite motions in galaxy clusters yields discrepancies that challenge the definition of âtodayâ.
Analysis of archival XMM-Newton data yields measurements of stellar wind emission from three star systems, illustrating a direct method to determine the mass-loss rates of late-type main-sequence stars.
Kepler-1625b-I and Kepler-1708b-I are the most noteworthy exomoon candidates to date. A new analysis of the available data comes to a different conclusion.
Binary neutron star mergers are complex to understand astrophysically. A small piece of the puzzle may now have been solved using a computationally intensive simulation to explain how short gamma-ray bursts can be launched by a magnetar engine.
The size distribution of solid grains in dense clouds is a key parameter to constrain in order to understand grain growth, which influences the nature and timescale of the formation of protoplanets. A JWST study has quantified the grain size distribution by modelling the spectral absorptions arising from ice components of grains before protostellar collapse.
A model investigating the build-up of the atmosphere of Venus shows that it could have originated from a vigorous phase akin to plate tectonics during the first billion years of its evolution.
Measurements of Jupiterâs gravity by the Juno mission have established that the winds extend 3,500 kilometres below the surface. Cylindrically oriented zonal flows provide the best match in a new model using gravity harmonics up to degree 40.
