#Y2023 #天文光学 Euclid is a wide-angle space telescope with a 600-megapixel camera to record visible light, a near-infrared spectrometer, and photometer, to determine the redshift of detected galaxies. It was developed by the European Space Agency (ESA) and the Euclid Consortium and was launched on 1 July 2023.  [项目官网](https://www.esa.int/Science_Exploration/Space_Science/Euclid_overview)