Extrasolar Planetary Systems - Planetary Dynamics - Planet Formation - Exoplanet Searches - Modeling Stars & Planets - Astrobiology - Astrostatistics - High Performance Computing

Press Coverage of Our Research

The mass of the Mars-sized exoplanet Kepler-138 b from transit timing

 [ Artist impression of Kepler-138.  Credit:  Danielle Futselaar, SETI Institute.]

New NASA coalition to lead search for life on distant worlds includes two leaders at Penn State

 [ The search for life beyond our solar system requires unprecedented cooperation across scientific disciplines. NASA's NExSS collaboration includes those who study Earth as a life-bearing planet (lower right), those researching the diversity of solar system planets (left), and those on the new frontier, discovering worlds orbiting other stars in the galaxy (upper right).  Credits: NASA ]

Architectures of planetary systems and implications for their formation



 [ An illustration of the orbital distances and relative sizes of the four innermost planets known to orbit the star 55 Cancri A (bottom) in comparison with planets in own inner Solar System (top). Both Jupiter and the Jupiter-mass planet 55 Cancri

The 55 Cancri Planetary System: Fully Self-Consistent N-body Constraints and a Dynamical Analysis



An Earth-Sized Planet in the Habitable Zone of a Cool Star

 [  The diagram compares the planets of our inner solar system to Kepler-186, a five-planet star system about 500 light-years from Earth in the constellation Cygnus. The five planets of Kepler-186 orbit an M dwarf, a star that is is half the size and mass of the sun. The Kepler-186 system is home to Kepler-186f, the first validated Earth-size planet orbiting a distant star in the habitable zone -- a range of distance from a star where liquid water might pool on the planet's surface. The discovery of Kepler-186f confirms that Earth-size planets exist in the habitable zones of other stars and signals a significant step toward finding a world similar to Earth. Credit: NASA Ames/SETI Institute/JPL-Caltech ]

Stellar Spin-Orbit Misalignment in a Multiplanet System

 [ Planets and orbits releative to solar system.  Image credit: NASA Ames/JPL-Caltech ]

Kepler-62: A Five-Planet System with Planets of 1.4 and 1.6 Earth Radii in the Habitable Zone



Kepler-47: A Transiting Circumbinary Multiplanet System

 [ An artists depiction of the Kepler-47 system.  Credit: NASA/JPL-Caltech/T. Pyle ]

The Neptune-Sized Circumbinary Planet Kepler-38b

  • Kepler-38: the Galaxy's Count of Binary Stars with Planets is Increasing: NASA Press Release, August 20, 2012

Transit Timing Observations from Kepler: VII. Confirmation of 27 planets in 13 multiplanet systems via Transit Timing Variations and orbital stability

 [ Artist impression of hot-Jupiter next to star.  Credit: ESA, NASA and G. Tinetti (University College London/ESA) ]

Kepler constraints on planets near hot Jupiters

 [ Dust ring around Fomalhaut from ALMA (orange) and HST (blue) Credit: ALMA (ESO/NAOJ/NRAO) Visible light image NASA/ESA HST Boley et al. 2012 ]

Constraining the Planetary System of Fomalhaut Using High-Resolution ALMA Images