A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary

A. Gould, A. Udalski, I. -G. Shin +61

We detect a cold, terrestrial planet in a binary-star system using gravitational microlensing. The planet has low mass (2 Earth masses) and lies projected at $a_{\perp ,ph}$ ~ 0.8 a…