The TOI-700 star system is home to four planets, including two in its habitable zone that could host liquid water.
NASA's Goddard Space Flight Center
With more than 5,000 known exoplanets, astronomers are shifting their focus from discovering additional distant worlds to identifying which are good candidates for further study.
Artist illustration of an exoplanet.
dottedhippo/iStock via Getty Images
Billions of galaxies are in the universe, with billions of stars in every galaxy. Could billions of planets be out there too?
Imagined view from Kepler-10b, a planet that orbits one of the 150,000 stars that the Kepler spacecraft is monitoring.
NASA/Kepler Mission/Dana Berry
When NASA first started planning the Kepler mission, no one knew if the universe held any planets outside our solar system. Thousands of exoplanets later, the search enters a new phase as Kepler retires.
Have we really discovered other “Earth-like” planets orbiting around other stars? Understanding what we do and do not know about exoplanets is the key to answering this question.
ESO/L. Calcada/N. Risinger/Reuters
Over the last 20 years, advances in the field of exoplanet discovery have excited the imaginations of scientists and enthusiasts alike. But we’re in position to know yet whether a planet is habitable.
Artist’s impression of the surface of the planet Proxima b, orbiting Proxima Centauri.
Scientists have finally found an Earth-like planet we may actually be able to visit.
Satellite image of California’s San Andreas fault, where two continental plates come together.
NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team
Fifty years on from a groundbreaking paper, geophysicists have progressed from believing continents never moved to thinking that every movement may leave a lasting memory on our planet.
A laser could hide – or broadcast – our existence.
European Southern Observatory
There are technological ways to hide a planet from intergalactic detection – as well as ways to signal that we’re just sitting here, eager for contact.
What secrets will space reveal?
Why the Breakthrough Listen project is a step in the right direction in our hunt for life beyond Earth.
Building a space colony is not easy.
In June, the popular press went wild. A planet had been discovered that was so much like Earth it was heralded as our best bet for supporting life. Positioned 16 light years away, Gliese (or GJ) 832c was…
Let’s hope it’s barren.
NASA Ames/SETI Institute/JPL-CalTech
Last week, scientists announced the discovery of Kepler-186f, a planet 492 light years away in the Cygnus constellation. Kepler-186f is special because it marks the first planet almost exactly the same…