Context. The object K4-47 is a young planetary nebula that exhibits low-ionisation structures in the form of two 'lobes'. The unusual chemistry of the nebula has raised questions about whether K4-47 is a true planetary nebula or if the origins are more exotic in nature. Aims. We aim to investigate the spatially resolved structure of the nebula

WASP-11 b/HAT-P-10 b is an inflated hot Jupiter, which has a low density that makes it a good target for atmospheric studies using the transmission spectroscopy technique. In this work, we present 31 new transit light curves of WASP-11 b/HAT-P-10 b, obtained through the Spectroscopy and Photometry of Exoplanet Atmospheres Research Network. These

Context. Elemental abundances of FGK stars can be derived routinely from high-resolution optical spectra, but this remains considerably more difficult for cooler stars. Even estimates of the chemical composition of planet-host stars are central for studies of planet formation and interior composition, however. Machine-learning methods offer a

Context. Group environments are thought to play a key role in shaping galaxy evolution prior to cluster accretion. However, direct observational evidence linking group─cluster interactions to the transformation of low-mass galaxies remains scarce. Aims. The nature and origin of the W cloud, located in the southern outskirts of the Virgo cluster

The determination of the cutoff frequency in real solar observations under different local physical conditions is an important and underexplored aspect of waves in solar physics. This work utilizes the near ultraviolet (NUV) spectrum of the quiet sun (QS), observed by the Interface Region Imaging Spectrograph (IRIS) on November 16th, 2013, in sit

Context. Dark galaxies are small, dark matter-dominated haloes whose gas remains in hydrostatic and thermal equilibrium and has never formed stars. These systems are of particular interest because they represent a strong prediction of the Lambda cold dark matter (ΛCDM) model. As of today, only a few dark galaxy candidates have been detected so far