We have developed an advanced ultraviolet (UV) spectropolarimeter called Chromospheric Layer SpectroPolarimeter (CLASP2), designed to explore the magnetic fields in the upper solar chromosphere. CLASP2 was launched on board a NASA sounding rocket experiment in 2019, and successfully detected the full Stokes vector in an active-region (AR) plage and

Context. This paper focuses on a class of galaxies characterised by an extremely low surface brightness: ultra-diffuse galaxies (UDGs). We used new integral-field (IF) spectroscopic data, obtained with the ESO Large Programme Looking into the faintEst WIth MUSE (LEWIS). It provides the first homogeneous IF spectroscopic survey performed by MUSE at

Strongly lensed supernovae (SNe) are a rare class of transient that can offer tight cosmological constraints that are complementary to methods from other astronomical events. We present a follow-up study of one recently discovered strongly lensed SN, the quadruply imaged type Ia SN 2022qmx (aka "SN Zwicky"), at z = 0.3544. We measure updated

Context. The James Webb Space Telescope large program DiSCo-TNOs has recently shown that CO 2 ice is ubiquitous on 54 mediumsize trans-Neptunian objects (TNOs). TNO surfaces are found to define three main spectral and thus compositional groups that are likely linked to their position before planetary migration. CO ice is observed on the spectral

X-ray observations of the optically selected z = 6.025 quasi-stellar object (QSO) CFHQS J164121+375520 (hereafter J1641) revealed that its flux dropped by a factor of ≳7 between 2018, when it was a bright and soft X-ray source, and 2021. Such a strong variability amplitude has not been observed before among z > 6 QSOs, and the underlying physical

A crucial element of the stability of sunspots was the apparent need for the umbral magnetic flux, monolithically dense in the photosphere, to separate into thin magnetic strands a few hundred km beneath its photosphere (Eugene Parker, 1979). The submerged medium separating the magnetic strands bears a crucial relationship to umbral dots, which