And only 700 light years away ;) It would be nice to compare the atmospheric spectrum of WASP-39b. As well as other candidate exoplanets in habitable zones. With the baseline of our own home planet.
High resolution transmission spectrum of the Earth's atmosphere -- Seeing Earth as an exoplanet using a lunar eclipse
High resolution transmission spectrum of the Earth's atmosphere -- Seeing Earth as an exoplanet using a lunar eclipse
https://arxiv.org/abs/1405.4780