A Chinese space mission to identify “like us” planets

Are we alone in the universe and how do the planets become the cradle of life? To answer these two questions, a team of Chinese scientists is proposing a space astronomy mission that is betting on discovering habitable planets like ours. That is, the same size and mass that evolved in the habitable zone of the F, G and K stars of the spectral type like our Sun.

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[EN VIDÉO] On the way to Proxima B, our nearest habitable exoplanet
Leave the solar system to reach the habitable exoplanet Proxima B discovered around the nearest star Proxima Centauri.

A few days ago, we introduced you to the Chinese project for a space observatory Earth-like planets And potentially livable. Today, Futura invites you to discoverStudy More ambitious space missions conducted by a team of scientists from reputable Chinese institutions and organizations. It’s chess (Closeby Habitat Exoplanet Survey) Designed to discover habitable planets like Earth, similar in size and MassIn the surrounding habitable zoneThey Solar type and near us. That means at least 32 are located Light year Our (10) Parsek)

According to Jean Snyder, AstrophysicistEmeritus, director of CNRS research at the Paris-Mdon Observatory, and a member of Plato’s scientific team. “ This project seems to be much more interesting than the transit of the Earth 2.0 Space Observatory because it probably won’t do any better. Mission Plato Of ‘European Space AgencyWhose launch is confirmed

Chase is an astronomical mission that will focus on observing the hundred F, G and K type stars already selected to deeply identify the planetary system of this star. The Telescope Will be equipped with a Mirror 1.2 meters and will operate at Lagrange Point No. 2 for at least 5 years, whereJames Web Observatory. This information will help us improve our understanding of the structure of the planetary system,Emergence Life (although strictly speaking, Chase cannot detect any active life structure) and may reflect our own evolution. The solar system.

Accurate astronomy is the key to “earth-like” discovery

According to the authors of the study, accurate astronomy, guided from space, is the best way to find Earth’s planets. Habitable zone They are close to us. With the accuracy of a microsecond arc sequence, the Chess Satellite will be able to detect and detect Earth-like planets by measuring the smallest changes and disturbances that will affect the target stars. This measurement will be related to six to eight reference stars for each target star.

In March 2022, 38 candidatesExoplanet Discovered habitable zone, mostly around M-type stars. Gears Radial but transit methods can only measure the size of a planet rather than its actual mass, and radial velocity measurements alone can reveal the lowest mass of a planet much larger than Earth. Today, it is not yet possible to confirm whether these planets are terrestrial. The identification of habitable planets requires extreme precision which seems to allow high-precision luminosity.

Chase wants to be a complementary mission to others in the future that will follow in the coming years, including Plato and Ariel European Space Agency, Nancy Roman Space Telescope Of NASA Or Xutian telescope, two meters in diameter that will fly in a co-orbital configuration Chinese space station.

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