China is preparing to launch its ambitious Xuntian space telescope (also known as the China Survey Space Telescope or CSST). This project promises not only to revolutionize Chinese astronomy but also to contribute to the understanding of the universe. Initially scheduled for 2024, the launch was postponed to December 21, 2026as announced during the annual conference CSST2024 held in Hangzhou.
The dimensions of the primary mirror of 2 meterssmaller than those of other space telescopes, offer an exceptional field of view, 300-350 times wider than that of the famous telescope Hubble.
This feature, combined with the powerful camera gives 2,5 gigapixelwill allow you to map approximately the 40% of the sky over ten years, collecting an unprecedented amount of data.
Xuntian Space Telescope: a powerful eye on the universe
The telescope's obstruction-free, off-axis design eliminates diffraction problems and guarantees sharp and detailed images. It will also be equipped with five cutting-edge instruments:
- a camera for detecting celestial objects;
- and terahertz receiver for the study of cosmic radiation;
- and multi-channel imager for the analysis of the chemical composition of the stars;
- one spectrograph full field to measure light distribution;
- and coronografo for the direct observation of extrasolar planets.
The primary mission of the telescope will be to conduct multiband investigations high resolution over a large portion of the sky, covering an inclusive wavelength range between 255 and 1000 nanometers.
In addition to large-scale observations, the telescope will also focus on specific deep fields, achieving an observation depth beyond that of larger surveys.
Its capabilities, which combine angular resolution, depth, bandwidth, and imaging and spectroscopy capabilities, make it a powerful tool for modern astronomy. It will also integrate with other international projects such as the observatory Vera C. Rubinthe space telescope Euclid of ESA and the Nancy Grace Roman of NASA.
The launch of the Xuntian space telescope 2026 will mark a new era for Chinese astronomy. It will pave the way for revolutionary discoveries and greater international collaboration in space research.
