August 2025 – Page 21 – My WordPress Site

(a) Reconstruction of the onset and spreading of the Proto-Tethys Ocean at ca. 620 Ma after the breakup of the Rodinia Supercontinent; (b) migration of the oceanic plate results in significant changes in the thickness of the lithospheric mantle above the mantle plume and its melting depth, resulting in different magma compositions; (c) continuous plume activity of 620–470 Ma forms the seamount chain. With oceanic plate subduction, the buoyant seamount chain reaches the subduction zone and may accrete to the continent or be subducted with the oceanic crust to the deep mantle -- Science Bulletin

Habitable Zones, Tethys, Water/Hycean Worlds & Oceanography

Long-lived Mantle Plume Tracing The Onset And Spreading Of The Proto-Tethys Ocean

by Keith CowingAugust 1, 2025October 7, 2025

Schematic view of the optical design and layout of the NIRPS spectrograph and its components. -- astro-ph.IM

Astronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Proxima Centauri

Near-InfraRed Planet Searcher (NIRPS) Joining HARPS At ESO 3.6 m. On-sky Performance And Science Objectives

by Keith CowingAugust 1, 2025August 1, 2025

Schematic presentation of the system showing the binary star and the two planets orbiting the primary. The primary star is at the origin of the coordinate system. The indices I, O, S refer to the inner and outer planet, and the secondary star, respectively. -- astro-ph.EP

Exoplanets, -moons, -comets, Stellar Cartography

Secular Resonances in Planet-Hosting Binary Stars. I. General Theory

by Keith CowingAugust 1, 2025August 1, 2025