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Exoplanet Gas Spotted from Earth
from BBC News Online
Astronomers have used a new ground-based technique to study the atmosphere of a planet outside our Solar System.
The work could assist the search for Earth-like planets with traces of organic, or carbon-rich, molecules. Gases have previously been discerned on exoplanets before, but only by using space-based telescopes.
Astronomers reporting in Nature say their method of spotting methane gas on exoplanets could be extended to many other, ground-based telescopes. Methane was first spotted on an exoplanet named HD 189733b in 2008 by a group led by Mark Swain of Nasa's Jet Propulsion Laboratory in the US.
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