That’s no planet! It’s one to five moons.
Most planets in our solar system have multiple moons, from Mars’ 2 to Saturn’s ~82. Today’s paper explores the stability and detectability of multi-”exomoon” systems orbiting planets beyond our solar system.
WASP-47b: A Hot Jupiter with Friends
What might be the strangest architecture yet of an exoplanetary system was discovered, and it raises big questions as to how planetary systems form and evolve.
Kepler-19b and its mysterious companion
I’m here at the Extreme Solar Systems 2 conference in Jackson Hole, Wyoming. On Monday, Sarah Ballard spoke about recent results on the Kepler-19 system; she led a paper on this object that was posted to the arxiv last week. This is the story of the newly-discovered transiting planet Kepler-19b and its mysterious companion.