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This is an artist’s impression based on published scientific data on the HR 8799 solar system. The magenta, HR 8799c planet is in the foreground. Compared to Jupiter, this gas giant is about seven times more massive and has a radius that is 20 percent larger. HR 8799c’s planetary companions, d and b are in the background, orbiting their host star. Credit: W. M. Keck Observatory/Adam Makarenko/C. Alvarez
Researchers are perfecting technology to one day look for signs of alien life. Astronomers have gleaned some of the best data yet on the composition of a planet known as HR 8799c – a young giant gas planet about 7 times the mass of Jupiter that orbits its star every 200 years.
The team used state-of-the art instrumentation at the W. M...
Summary of gaseous, surface, and temporal biosignatures.
Some of the leading experts in the field, including a UC Riverside team of researchers, have written a major series of review papers on the past, present, and future of the search for life on other planets. Published in Astrobiology, the papers represent two years of work by the Nexus for Exoplanet Systems Science (NExSS), a NASA-coordinated research network dedicated to the study of planetary habitability, and by NASA’s Astrobiology Institute.
Scientists have identified more than 3,500 exoplanets and many more will be discovered in the coming decades. Some of these are rocky, Earth-sized planets that are in the habitable zones of their stars, i.e. it’s neither too hot nor too cold for liquid water – and possibly life – to exist...
This is an artist’s illustration of a potentially habitable exomoon orbiting a giant planet in a distant solar system. Credit: NASA GSFC: Jay Friedlander and Britt Griswold
Researchers have identified 121 giant planets that may have habitable moons. Their work will guide the design of future telescopes that can detect these potential moons and look for tell-tale signs of life, called biosignatures, in their atmospheres. Since the 2009 launch of NASA’s Kepler telescope, scientists have identified thousands of planets outside our solar system, which are called exoplanets. A primary goal of the Kepler mission is to identify planets that are in the habitable zones of their stars, meaning it’s neither too hot nor too cold for liquid water – and potentially life – to exist.
Co-author I. Altshuler sampling permafrost terrain near the McGill Arctic research station, Canadian high Arctic. Credit: Dr Jacqueline Goordial
Miniature instruments and new techniques can detect and analyze microorganisms in extreme environments resembling those on Mars. Researchers demonstrate for the first time the potential of existing technology to directly detect and characterize life on Mars and other planets. The study, published in Frontiers in Microbiology, used miniaturized scientific instruments and new microbiology techniques to identify and examine microorganisms in the Canadian high Arctic – one of the closest analogs to Mars on Earth...
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