Science ❯ Astronomy ❯ Astrophysics

Chemical Composition

Carbon Monoxide Methane Detection Polycyclic Aromatic Hydrocarbons Planetary Conditions Ionised Elements Cyanide and Nickel Emissions Carbon Dioxide Plume Space Chemistry Intermediate-Mass Elements Carbon Dioxide to Oxygen Ratio Nucleus Size Ionized Iron Spectrography Metallicity Carbon Dicarbon Volatile Elements Deuterium and Hydrogen Isotopes Carbon Dioxide Gas Giants Methane Core Accretion Oxygen Detection Cometary Chemistry Carbon Dioxide in Comets Research on Nebulae Iron Emissions Lithium in Stars Water Emissions Koma Composition Carbon Detection Element Abundance Variations Color Variations

SETI Finds No Radio Signs From Interstellar Visitor 3I/ATLAS

New radio power limits along with James Webb’s first chemical fingerprint show the object best fits a natural comet and establish practical benchmarks for future interstellar-object follow-ups.

Webb Detects Methane on Interstellar Comet 3I/ATLAS

Six Young Red Dwarfs Show Signs of Swallowing Earth‑Sized Rocky Planets

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

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