Exoplanets orbiting Trappist-1 and the search for life – Science Weekly podcast

Hannah Devlin explores the research behind the recent announcement of seven Earth-size planets and asks how we might probe their nature, including a suitability for life

Exoplanet discovery: seven Earth-sized planets found orbiting nearby star

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On 22 February, Nasa announced the discovery of seven Earth-sized exoplanets orbiting a faint star called Trappist-1 in the constellation of Aquarius. They also announced that three of the seven planets are thought to lie within the so-called Goldilocks zone, where temperatures are warm enough - but not too warm - for liquid water to be present on surface, making the planets potentially habitable.