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According to the British "Daily Mail" reported on November 23, astronomers made new strides in the search for extraterrestrial life, and found that there is water in the atmosphere of the planet HR 8799c 179 light-years from Earth, but there is no methane.
An astronomical group has observed at the Keck Observatory in Mauna Kea, Hawaii, that the planet HR 8799c has water in the atmosphere but has no methane.
The planet is located in Sagittarius, one of four planets orbiting the HR 8799. It is seven times larger than Jupiter and 179 light-years from Earth.
Astronomers used high-tech instruments to confirm the presence of water in the planet's atmosphere and the lack of methane. The team combined high-resolution spectroscopy and adaptive optics to avoid the ambiguity of the Earth's atmosphere, take photos of the planet and use a spectrometer to decompose the light of the planet to get a fingerprint of the chemical in the atmosphere.
Although astronomers have taken photos of more than a dozen alien planets, the HR 8799 is the only multi-planetary solar system ever photographed. Experts now want to repeat this process for asteroids that are closest to their stars.
The aim of Keck Observatory scientists is to look for life-enhancing chemicals such as water, oxygen and methane in the atmosphere of terrestrial planets. This goal can be achieved through a 30-meter telescope that will be put into use.
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