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Evidence of the habitability of nearby exoplanets could be found with future space missions using the technique of nulling interferometry. A nulling interferometer selectively suppresses the glare of starlight while allowing the light from planets to be detected. Here we report the first demonstrations of broadband mid-infrared nulling at the level required to enable such a space mission. In three separate 6 hr measurements, mid-infrared nulls were demonstrated at a mean level less than 1:0 ×doi:10.1086/649850 fatcat:34mjcxcz6vgzbhwuekn775tgza