Researchers have discovered a new Earth-sized planet orbiting a star outside our solar system. Bizarre new planet is largest known rocky world, 40 times as massive as Earth. However, in the 1990s Pluto was demoted to the status of a dwarf planet rather than a true planet. Initially, it was thought that we had nine planets, when Pluto was discovered in the 1930s. By Jay Bennett. Newly Discovered Earth-Like Planet Is Speeding Toward Us. The bulky object—possibly the core of a failed gas giant—challenges what astronomers think about how planets … A newly-discovered exoplanet more than 1,200 light-years from Earth has three times the mass of Jupiter and is the new "king" of its solar system. An illustration of a large, rocky planet similar to the recently discovered BD+20594b. HD 100546 b: 6.9 +2.7 −2.9: Largest exoplanet in the NASA Exoplanet Archive, although because of flux from the planet and the disk that are superimposed, the exact size of this planet cannot be determined and the emitting area has this size, composed of the planet and most likely its disk too, and is not to be mistaken as a single planet radius.Over time, it will shrink to the size of Jupiter. Artist’s impression of the biggest planet known. All planets orbit around the sun. Credit: JPL-Caltech/NASA. Erika P. Jul 02, 2020 05:19 AM EDT NASA and G. Bacon (STScI) PSR B1620-26 b has two host stars rotating around each other – and it has outseen the lives of both. Clearly Jupiter is the largest we have found in our solar system, but there may be billions of planets that are larger. The planet, called Kepler-1649c, is only around 1.06 … Largest Known Rocky Planet 40 Times Larger Than Earth Found Orbiting a Sun-Like Star 730 Light Years Away. About 11 light-years away, Ross 128 b is closer to the solar system than any known exoplanet save Proxima b. By Sarah Wells 27 December 2019. 2MASS J2126–8140 is a gas giant about 12 to 15 times the mass of Jupiter, located about 100 light-years away from Earth. The Biggest Alien Planet Discoveries of 2019. ... researchers reported that they had found two Earth-like exoplanets circling a … ... the largest planet in our solar system. Astrophysicists using the Kepler Spacecraft have discovered the largest rocky planet yet: BD+20594b is 16 times as massive as Earth. The eight planets are outlined below, from largest to smallest: 1. The planet, known as 2MASS J2126–8140, and its star, called TYC 9486–927–1, were both identified within the past decade, but the massive distance between them meant no one had ever considered that the pair might be related.