Hubble Succeeds Where TESS Couldn't: It Measured the Nearest Transiting Earth-Sized Planet

Twenty-two light-years away, a rocky world orbits a red dwarf. It’s called LTT 1445Ac, and NASA’s Transiting Exoplanet Survey Satellite (TESS) found it in 2022. However, TESS was unable to gauge the small planet’s size. That’s okay. The venerable Hubble took care of it. TESS detects planets with the transit method. When an exoplanet transits …