Jakarta –
China propose search planet the closest possible alien from Earth livable. As part of this effort, they launched a spacecraft to take ultra-precise measurements of how orbiting planets make stars move.
For the mission, called the Closeby Habitable Exoplanet Survey (CHES), scientists will use a method called micro-arcsecond relative astrometry. This technique involves measuring the position and motion of the star very precisely compared to a set of background reference stars to detect stellar disturbances that result from the gravitational influence of the exoplanet as it orbits its star.
This method will provide estimates of the masses of exoplanets and the distances at which they orbit their stars, which in turn, can reveal whether these exoplanets have the potential to host life.
The European Space Agency’s Gaia space telescope used the same method to create a 3D map of the one billion stars in the Milky Way. Other planet-searching missions, such as NASA’s Transiting Exoplanet Survey Satellite, use a different technique called the transit method. This method looks for a decrease in the luminosity of a star as the planet passes through it. However, this method requires the planets to orbit the edges.
CHES will be much more focused than Gaia, targeting 100 Sun-like stars within 10 parsecs, or 33 light years from Earth and will be able to detect potentially Earth-like planets in the habitable zone around these stars. When surveying a relatively narrow selection of stars, CHES will be able to study the exoplanetary system comprehensively.
“The hunt for habitable worlds about nearby Sun-like stars will be a major breakthrough for mankind, and will also help humans visit Earth’s twin and expand our living space in the future,” said Ji Jianghui, a research professor from the Purple Mountain Observatory at Chinese Academy of Sciences (CAS) quoted from Space.com.
“To date, more than 5,000 exoplanets have been discovered and confirmed so far, including about 50 similar planets Earth in the habitable zone. But most of them are hundreds of light years from Earth.”
CHES will perform its work from Sun-Earth Lagrange Point 2, about 1.5 million kilometers from Earth, where Gaia, Spektr-RG and the James Webb Space Telescope are currently operating.
“CHES will be a wonderful addition to exploration planet extrasolar,” said Elizabeth Tasker, a professor at the Japan Aerospace Exploration Agency.
“While the number of potential targets is small, planetary mass measurements for planets orbiting our neighboring K-, G- and F-type stars will be a valuable addition to our current data and a step towards identifying habitable worlds.”
Tasker argues that while CHES can’t probe the surfaces of these planets to see if they have an Earth-like environment, direct mass measurements provide an important indicator of which planets can, or definitely don’t.
“Higher -mass planets will attract a thicker atmosphere than Earth, potentially containing gases like hydrogen and helium, which are excellent at trapping heat.
Habitability potential planet terrestrial of the discoveries made by CHES could be further investigated by other teams. For a planet making an observable transit across its star, the spectrum of light passing through the atmosphere of an exoplanet can be analyzed to reveal information about its composition.
The mission appears to be competing with other exoplanet proposals from the Shanghai Astronomical Observatory, also under CAS. The mission, dubbed Earth 2.0, will use the transit method to monitor 1.2 million dwarf stars, in an effort to detect exoplanets and narrow the search for potential twins. Earth. The mission will also operate from Sun-Earth Lagrange Point 2.
Watch Videos “The Moment 3 Chinese Astronauts Landed on Earth After Carrying Out Longest Mission“
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(rns/afr)
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