Timing the Shadow of a Potentially Habitable Extrasolar Planet Paves the Way to Search for Alien Life | NAOJ: National Astronomical Observatory of Japan - English
http://www.nao.ac.jp/en/news/science/2016/20161128-oao.html
A group of researchers from the National Astronomical Observatory of Japan (NAOJ), the University of Tokyo, and the Astrobiology Center
among others has observed the transit of a potentially Earth-like extrasolar planet known as K2-3d using the MuSCAT instrument on the Okayama
Astrophysical Observatory 188-cm telescope. A transit is a phenomenon in which a planet passes in front of its parent star, blocking a small
amount of light from the star, like a shadow of the planet. While transits have previously been observed for thousands of other extrasolar
planets, K2-3d is important because there is a possibility that it might harbor extraterrestrial life.
By observing its transit precisely using the next generation of telescopes, such as TMT, scientists expect to be able to search the atmosphere
of the planet for molecules related to life, such as oxygen.