I.I. Shevchenkob,c aV.I. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Kosygina str. 19, Moscow, 119991, Russian Federation bThe Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, Pulkovskoe shosse 65/1, St. Petersburg, 196140, Russian Federation cSt. Petersburg State University, Universitetskaya naberezhnaya, 7 - 9, St. Petersburg, 199034, Russian Federation
The exoplanets represent a new broad class of astronomical objects, which became accessible for observations and studies only just before the end of the last century. For less than a couple of decades, owing to the permanently improving techniques of the ground-based and especially space-born observations, thousands of planet systems of other stars have been discovered, and this process is escalating. Exoplanets are of paramount interest for astrophysical, astrochemical, and dynamical studies. Exoplanetary studies have opened up new horizons to get insights in fundamental problems of the stellar-planetary cosmogony, and, in particular, in the problem of the Solar system origin and evolution. Discoveries of Earth-like planets, especially those orbiting in stellar habitable zones favorable for life origin and sustainability, open new prospects for the progress of astrobiology.