Comet K1, whose full name is Comet C/2025 K1 (ATLAS) – not to be confused with interstellar comet 3I/ATLAS – was not the original target of a recent Hubble study.

F187N image showing Pa𝛼 emission line flux (MJy/sr), which can be treated as a proxy for FUV radiation. The dark blue regions have flux of the order 100 MJy/sr, and

Astrochemistry Status Report astro-ph.GA March 18, 2026 (Left) Depiction of the hemibonded CN radical adsorbed on a 14 H2O cluster. (Right, Top) Parallel geometries for the approach of C2H2 and

The strength of indirect detection signals from an Earth-like exoplanet as a function of stellar effective temperature. Bands encompassing main sequence spectral classes A through M color coded by temperature

Combined fit results for K2-79 b. Transit fit to the light curve data from K2 long cadence (first row left), TESS long cadence (first row centre), and CHEOPS (first row

Top: MIRI-MRS spectra of VHS 1256 b, with the spectral regions used for molecular detection highlighted for each species. Bottom: Corresponding Exo-REM molecular templates for the detected molecules, showing both

Co-added observed spectra of 3I with best-fit model Observed and modelled 13CN centred (left) and 15CN-centred (right) line profiles. The shaded region represents the uncertainty of the profile resulting from