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Chemical Composition

Spectrography Core Accretion Oxygen Detection Cyanide and Nickel Emissions Planetary Conditions Polycyclic Aromatic Hydrocarbons Nucleus Size Carbon Detection Koma Composition Carbon Dioxide Carbon Dioxide Plume Carbon Dioxide in Comets Volatile Elements Carbon Dioxide to Oxygen Ratio Carbon Dicarbon Water Emissions Metallicity Color Variations Cometary Chemistry Carbon Monoxide Space Chemistry Iron Emissions Ionised Elements Ionized Iron

New Spectrograph Reveals Mars-Mass Iron Bar in the Ring Nebula

Follow-up with WEAVE will test whether other elements align with the iron-only signal to distinguish planetary debris from stellar ejecta.

Mars-Mass Iron Bar Discovered Inside the Ring Nebula by New WEAVE Spectrograph

Astronomers Report Most Metal-Poor Star Yet From the Large Magellanic Cloud

Hubble Spots White Dwarf Devouring Icy, Nitrogen-Rich Exo‑Pluto Fragment

New Spectra Show 3I/ATLAS Is a Carbon‑Chain–Depleted Interstellar Comet With Weak CN Emission

Active Interstellar Comet 3I/ATLAS Set for Safe Solar System Passage