text:   Ultra-Short-Period Companions",6,"['The K2-266 system has a unique geometry, in which an ultra-short period (USP) planet resides significantly misaligned to a system of tightly packed inner planets (STIP). In our new paper (<LINK>), we present two ways this geometry can form. <LINK>', 'Although we don’t know which hypothesis is correct for K2-266, they’re both possibilities for this system and other systems with similar geometries!', 'One way for this to happen is to have an additional unseen planet in the system. Depending on its exact orbital parameters, such a companion can cause an initially coplanar USP-STIP system to become misaligned. https://t.co/9IpUxkNa8D', 'A second option to get this geometry is for the system to assemble while the star is still somewhat young and has a significant quadrupole moment. This, combined with a slight stellar obliquity with respect to the planet-forming disk, can also cause the USP-STIP misalignment.', 'For more details, please check out either the paper (https://t.co/5JE6tkcy44) or a short summary I wrote on my website (https://t.co/976xrQ8ZRU). \nThanks to all my coauthors on this work, @kbatygin, Dan Fabrycky, Fred Adams, @astroplum, Andrew Vanderburg, and @Astro_JRod', ""@ExoCytherean @kbatygin @astroplum @Astro_JRod Thanks! I'll be interested to hear what you think!""]",20,09,1226