We demonstrate the potential of Euclid 's slitless spectroscopy to discover high-redshift ( $z>5$) quasars and their main photometric contaminant, ultracool dwarfs. Sensitive infrared spectroscopy from space is able to efficiently identify both populations, as demonstrated by Euclid Near-Infrared Spectrometer and Photometer Red Grism (NISP ${\rm RG

Euclid is delivering optical and near-infrared imaging data over 14 000 deg 2 on the sky at spatial resolution and surface brightness levels that can be used to understand the morphological transformation of galaxies within groups and clusters. Using the Early Release Observations (ERO) of the Perseus cluster, we demonstrate the capability offered

The Near-Infrared Spectrometer and Photometer on board the Euclid space mission has obtained near-infrared (NIR) slitless spectra of millions of objects, including hundreds of ultracool dwarfs (UCDs). Euclid observations retrieve images and spectra simultaneously. This observing mode marks a new era in the discovery of new objects, such as L- and T

Context. The CNEOS database offers near-global coverage of fireball events based on U.S. Government sensor detections. The database contributes to investigations of meteoroid impact fluxes. However, the accuracy of these data is not reported. Aims. We aim to evaluate the reliability of CNEOS-derived ephemerides of fireball events given the absence

We present the discovery of a peculiar X-ray transient, EP241021a, by the Einstein Probe (EP) mission and the results from multiwavelength follow-up observations. The transient was first detected with the Wide-field X-ray Telescope as an intense flare lasting for ∼100 s, reaching a luminosity of L 0.5‑4 keV ≈ 10 48 erg s ‑1. Further observations