Space Telescope Science Institute astronomer Nikole Lewis uses a graphic to compare the size of Earth (bottom) with a recent discovery of an exoplanet, during a news conference to present new findings on exoplanets found orbiting Trappist–1. Photo: Reuters

A renewed dream of life beyond Earth

The discovery of seven Earth-sized – maybe even Earth-like – exoplanets sparks fresh debate about whether we are alone in the universe

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Space Telescope Science Institute astronomer Nikole Lewis uses a graphic to compare the size of Earth (bottom) with a recent discovery of an exoplanet, during a news conference to present new findings on exoplanets found orbiting Trappist–1. Photo: Reuters
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