Life on Earth has dramatically changed the chemistry of the planet. Astronomers will measure light that bounces off distant planets to look for similar clues that they host life.
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Beyond the outer edge of the Solar System, mysterious, unknown worlds await by the thousands. Astronomers can now finally find them and explore them - but will we find another Earth?
Scientists have discovered seven Earth-sized planets packed around a dim star.
If there’s life on one of the Earth’s seven sisters, chances are it has spread to all of them.
We don’t need to look for Earth-like planets exclusively around Sun-like stars. Tiny, dim TRAPPIST-1 has only 11 percent the diameter of the Sun and is much redder.
Top contributors
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Associate Dean for Research and Professor of Astronomy and Planetary Sciences, University of Arizona
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Associate Professor, Japan Aerospace Exploration Agency (JAXA)
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Professor of Planetary Geosciences, The Open University
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Professor of Astronomy & Astrophysics, University of California, San Diego
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University Distinguished Professor of Astronomy, University of Arizona
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Postdoctoral Fellow, Massachusetts Institute of Technology (MIT)
