Probing Seven Worlds with   JWST

Finding Habitable Planets

How do we find life outside our solar system? We start by looking for planets that resemble Earth, the only planet we know of that is habitable. This means we look for planets that are roughly the same size as Earth and orbit the right distance from their star to support liquid water at the surface, known as the habitable zone. Early planet hunters, like NASA’s Kepler/K2 mission, have discovered thousands of planets orbiting distant stars, including several that are small, like Earth, and reside in their star’s habitable zone. NASA’s Transiting Exoplanet Survey Satellite (TESS), will search for small planets that orbit stars in our solar neighborhood. Because these planets are much closer to us than the planets discovered by Kepler/K2, astronomers will be better able to characterize them and potentially find some with solid surfaces and detectable atmospheres.

The planets TESS discovers will be the touchstone planets for many years to come, allowing more powerful telescopes like the upcoming James Webb Space Telescope to look at them in greater detail. The Webb telescope will be able to probe planet atmospheres and look for biosignatures that could only be attributed to life on that planet. Future missions may one day directly image other planets, allowing researchers to complete a census of our galaxy and better understand not only if other habitable planets exist, but how common they are.

Related Researchers

Vladimir Airapetian, Giada Arney, Shawn Domagal-Goldman, Thomas Fauchez, Ravi Kopparapu, Avi Mandell, Tyler Groff, Eric Lopez, Michael McElwain, Aki Roberge, Neil Zimmerman, Maxime Rizzo, Bill Danchi

Related SEEC Projects

  1. Fauchez et al. - "Clouds and Hazes: Critical parameters to assess rocky exoplanet habitability with JWST?"
  2. Kopparapu et al. - "Determining the Atmospheric Composition and Rotation Rates of Habitable Zone M-dwarfs Planets with Thermal Phase Curves and Transit Spectra"
  3. Lopez et al. - "Steam Worlds not Water Worlds: Assessing The Maximum Size of Habitable Planets"
  4. McElwain et al. - "Exoplanet Spectroscopy Technologies"
NASA logo Goddard Space Flight Center


NASA Official : Ravi Kopparapu
Media Contact : Claire Saravia
Web Curator : Lori J. Tyahla