Press

Occurrence Rates of Planets Orbiting FGK Stars: Combining Kepler DR25, Gaia DR2, and Bayesian Inference

Press Coverage Extrasolar Earths May Circle 1 In 6 Sunlike Stars, Says New NASA Kepler Study: Forbes, Aug 15, 2019. Wow! What if 1 in 4 sunlike stars has an Earth?: EarthSky, Aug 23, 2019. Analysis shows 1-in-6 stars may host Earth-size planets: Astronomy Now, Aug 16, 2019. How many Earth-size planets are around sun-like stars?: Penn State, Aug 14, 2019.

Habitability of Exoplanet Waterworlds

Press Coverage Are Water Worlds Habitable?: Scientific American, April 5, 2018. Europan Space Whales Anyone? Planets Covered by Deep Oceans Can Still Have Life on Them: Universe Today, Sept 5, 2018. Water worlds could support life, study says: U Chicago, Aug 31, 2018. ‘Water worlds’ could have stable climate, perhaps support life, study says: Penn State, Aug 31, 2018

A Dynamical Analysis of the Kepler-80 System of Five Transiting Planets

Press Coverage Astronomy magazine Centauri Dreams

A resonant chain of four transiting, sub-Neptune planets

Press Coverage Penn State U Chicago UC Berkeley

Secure Mass Measurements from Transit Timing: 10 Kepler Exoplanets between 3 and 8 M$_⊕$ with Diverse Densities and Incident Fluxes

Popular Summary Penn State Center for Exoplanets & Habitable Worlds

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

Here we report the sizes and masses of three planets orbiting Kepler-138, a star much fainter and cooler than the Sun. We determine that the mass of the Mars-sized inner planet, Kepler-138 b, is $0.066^{+0.059}_{-0.037}$ Earth masses. The middle and outer planets are both slightly larger than Earth...

Architectures of planetary systems and implications for their formation

Press Coverage New Evidence Reveals What a “Typical” Solar System Looks Like: io9.com, April 28, 2014

The 55 Cancri planetary system: fully self-consistent N-body constraints and a dynamical analysis

Press Coverage The 55 Cancri Planetary System: Fully Self-Consistent N-body Constraints and a Dynamical Analysis Solved: Mysteries of a Nearby Planetary System's Dynamics: Penn State pres release, April 22, 2014 Mysteries of a nearby planetary systems dynamics now are solved: Astronomy Magazine, April 22, 2014 Mysteries of Nearby Planetary Systems Dynamics: Astrobiology Magazine, April 23, 2014

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.

Stellar Spin-Orbit Misalignment in a Multiplanet System

Press Coverage Kepler finds first known tilted solar system: Nature, October 17, 2013 A Planetary System Out of Whack: Sky & Telescope, October 17, 2013 Weird Out of Whack Exoplanetary System Discovered: Discovery News & Space.com, October 17, 2013 Astronomers Discover A Tilted Solar System: Forbes, October 17, 2013 Kepler-56: Misaligned Planets Around a Swelling Star: Centauri Dreams, June 6, 2014

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

Press Coverage Two Promising Places to Live, 1,200 Light-Years From Earth: April 18, 2013 How 'Habitable' are Kepler's New Worlds?: Discovery News, April 22, 2013 NASA's Kepler Discovers Its Smallest 'Habitable Zone' Planets to Date: NASA press release, April 18, 2013 Kepler-62e: Super-Earth and Possible Water World: Space.com, December 31, 2013

Transit timing observations from Kepler - VII. Confirmation of 27 planets in 13 multiplanet systems via transit timing variations and orbital stability

Press Coverage Kepler space telescope adds 41 planets to its lengthening list: NBCNews.com, August 20, 2012 41 New Transiting Planets in Kepler Field of View: NASA Feature, August 22, 2012 Data confirm 41 more exoplanets: UPI, August 24, 2012 : : : : : --

The Neptune-sized Circumbinary Planet Kepler-38b

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

Kepler-47: A Transiting Circumbinary Multiplanet System

Press Coverage Two planets ... Two stars: Nasa detects strange new solar system : Daily Mail, August 30, 2012 Tatooine Now: NASA Finds Planet Orbiting Binary Star System : Time, August 29, 2012 Astronomers spot multiplanet system with 2 'suns': CBC News, August 29, 2012 Astronomers Find Double-Planet, Double-Star System: Wired Science, August 29, 2012 Alien planets found with twin suns like Luke Skywalker's homeworld: August 29, 2012 Kepler Space Telescope Discovers Tatooine-Like Twin Star/Twin Planet System: Slate, August 29, 2012 Double Planets Found Orbiting Twin Stars: National Geographic Daily News, August 29, 2012 NASA Finds Multiple Planets Circling Binary Star System: Forbes, August 29, 2012 Tatooine-like double-star systems can host planets: BBC News, August 29, 2012 Astrophile: Two planets with two suns up odds for life: New Scientist, August 29, 2012 'Star Wars' planetary system found: ABC Science, August 29, 2012 In a first, astronomers see two planets orbiting binary stars: LA Times, August 28, 2012 Exoplanet pair orbits two stars: Science News, August 28, 2012 How 'Tatooine' Planets Orbit Twin Stars of Kepler-47: Space.

Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities

Press Release Alien World Looms Large in its Neighbor World’s Sky

Alignment of the stellar spin with the orbits of a three-planet system

Press Coverage Alien Solar System Looks a Lot Like Our Own: July 25, 2012

An abundance of small exoplanets around stars with a wide range of metallicities

Press Coverage https://www.jpl.nasa.gov/news/news.php?feature=3401

Constraining the Planetary System of Fomalhaut Using High-resolution ALMA Observations

Zooming in on Fomalhaut This video sequence starts with a wide-field view of the sky around the star Fomalhaut in the constellation of Piscis Austrinus (The Southern Fish). Fomalhaut is the brightest star in the constellation and one of the brightest stars known to have an orbiting planet. It lies about 25 light-years from the Earth and is surrounded by a huge disc of dust. The final view of this video shows a new ALMA image of the disc (orange) and the new results from ALMA have given astronomers a major breakthrough in understanding a nearby planetary system and provided valuable clues about how such systems form and evolve.

Transit Timing Observations from Kepler. II. Confirmation of Two Multiplanet Systems via a Non-parametric Correlation Analysis

Planets in Systems from NASA’s Kepler Mission The image above depicts multiple planet systems discovered by NASA’s Kepler mission and confirmed by transit timing variations (as of January 2012). Out of hundreds of candidate planetary systems, scientists had previously verified six systems with multiple transiting planets (denoted here in red). Now, Kepler observations have verified planets (shown here in green) in 11 new planetary systems. Many of these systems contain additional planet candidates that are yet to be verified (shown here in dark purple).

Transit Timing Observations from Kepler. IV. Confirmation of Four Multiple-planet Systems by Simple Physical Models

Planets in Systems from NASA’s Kepler Mission The image above depicts multiple planet systems discovered by NASA’s Kepler mission and confirmed by transit timing variations (as of January 2012). Out of hundreds of candidate planetary systems, scientists had previously verified six systems with multiple transiting planets (denoted here in red). Now, Kepler observations have verified planets (shown here in green) in 11 new planetary systems. Many of these systems contain additional planet candidates that are yet to be verified (shown here in dark purple).