|Detail||：||What is an exoplanet and why is direct imaging of a "second Jupiter" around the Sun-like star GJ 504 so significant? This movie describes the answers to these questions. Exoplanets are planets orbiting stars other than our Sun, outside of our Solar System. Indirect observation techniques like radial velocity variation or planetary transits have been the main way that the 890 exoplanets reported thus far have been discovered. In contrast, only a dozen planets with a location similar in scale to that of the Solar System have been discovered, and the Subaru Telescope's direct imaging of GJ 504 b now joins the list. The discovery is part of the SEEDS (Strategic Explorations of Exoplanets and Disks with Subaru) Project, an international project approved by the National Astronomical Observatory of Japan (NAOJ); begun in 2009, it continues to probe this new frontier as part of a five-year direct imaging survey of exoplanets and disks around a targeted total of 500 stars.
Direct Imaging Discovery of a Second Jupiter
August 4, 2013
Last updated: February 18, 2021