Evidence for Carbon Dioxide in atmosphere of an extra-solar planet

Observations of an extrasolar planet with the Hubble Space Telescope recently found evidence for Carbon Dioxide in this planet. This extrasolar planet is a transiting planet, meaning that its orbit around its star passes directly between the Earth and its star. As a result, from the Earth we can observe this planet's atmosphere absorbing light from this star, and by looking at what wavelengths are absorbed, figure out what chemicals are in its atmosphere. For more information, go here.