Currently, scientists have a new study shows that the outer signs of life a new generation of search-based Space Telescope should focus in order to detect water, oxygen and chlorophyll plants outside the planet, which would effectively discover whether there is life on a star ball.
According to foreign media reports, at present, scientists have a new study shows that the outer signs of life a new generation of search-based Space Telescope should focus in order to detect water, oxygen and chlorophyll plants outside the planet, which would effectively discover whether there is life on a star ball .
In the past two decades, astronomers have discovered about 2000 exoplanets, most exoplanets located in the heart of stellar appropriate, the zone temperature warm enough, you can make the surface of the planet persistent liquid water. Astrobiologist hope that one day in the future be able to find signs of life on such exoplanets because most dynamic areas of life will exist of water on Earth.
A detection system strategy is to look for extraterrestrial life may change the appearance of certain stars, microbes, extraterrestrial life searching telescope can observe the life-related chemicals released spectrum, that is, the search for work should focus on vital signs – chemical substances or chemical substances produced by living organisms.
American Institute for Advanced Study in Princeton astrophysicist Timothy – Brent (Timothy Brandt) and David – Pi Geer (David Spiegel) Department of Life advocates outside next search plan should focus on the detection of water, oxygen and chlorophyll, plants use chlorophyll to convert sunlight into energy, the future will be NASA’s “Advanced Technology Large Aperture Space Telescope (ATLAST)” probing.
Scientists found that water can easily be found, the study authors Brent said: “Water is the most common molecules, I think the space mission in exoplanet survey spectrum should first look for signs of water did we have found in some large gaseous planet’s surface. water resources, the quality of these planets are Jupiter several times. “
In contrast difficult to detect oxygen, this process requires the Spirit sensitive scientific equipment to detect water twice, while closer to better distinguish light colors. Brent said: “But there are a lot of oxygen into Earth’s atmosphere only lasted hundreds of millions of years, if we detect a exoplanets atmosphere containing oxygen, which may imply the existence of signs of life, but that does not mean if you do not find the oxygen Fengyun the planet can not support life. “
The researchers noted that although a well-designed space telescope capable of detecting near water and oxygen on Earth exoplanet, but astrophysicists believe, related equipment need to be more sensitive, or lucky enough to find chlorophyll. Scientific equipment sensitivity to identify exoplanets chemicals needed to reach six times the identification of oxygen.
The presence of chlorophyll makes the light becomes slightly red, if extraterrestrial life can be like plants convert sunlight into energy, scientists believe that extraterrestrial life might use Unlike other pigment chlorophyll Earth, but alien planet while photosynthesis Some red, similar to the role of chlorophyll.
The researchers believe that the search for extraterrestrial life terrestrial system strategy should first look for water, followed by oxygen, then the chlorophyll. Brent said: “The future space telescopes to detect targets will mainly surrounded by water and oxygen on the planet’s surface stellar run, build and launch such a telescope cost at least $ 10 billion needed to build at least 20 years and is currently first need to develop a lot of science technology, which is probably the most exciting of my life discovery! “This latest study, published in a recent issue of” PNAS “magazine.