TRAPPIST-1 is in the constellation Aquarius, five degrees south of the celestial equator. TRAPPIST-1 is darker, redder, and smaller than the Sun. Description True-colour illustration of the Sun (left) next to TRAPPIST-1 (right). Some news reports incorrectly attributed the discovery of the TRAPPIST-1 planets to NASA in fact the TRAPPIST project that led to their discovery received funding from both NASA and the European Research Council of the European Union (EU). Since then, research has confirmed the existence of at least seven planets in the system, the orbits of which have been calculated using measurements from the Spitzer and Kepler telescopes. Complementing the findings were observations by the Himalayan Chandra Telescope, the United Kingdom Infrared Telescope, and the Very Large Telescope. The observations of TRAPPIST-1 are considered among the most important research findings of the Spitzer Space Telescope. The telescopes and observatories involved were the Spitzer Space Telescope the ground-based TRAPPIST and TRAPPIST-North in Oukaïmeden Observatory, Morocco the South African Astronomical Observatory and the Liverpool Telescopes and William Herschel Telescopes in Spain. In 2016, separate discoveries revealed that the third planet was in fact multiple planets. These were initially interpreted as indicating the existence of three planets. The discovery was based on anomalies in the light curves measured by the telescope in 2015. Its planetary system was discovered by a team led by Michaël Gillon, a Belgian astronomer at the University of Liege, in 2016 during observations made at the La Silla Observatory, Chile, using the TRAPPIST telescope. The name is a reference to the TRansiting Planets and PlanetesImals Small Telescope (TRAPPIST) project that discovered the first two exoplanets around the star. Publication of the discovery took place in 2000. It appeared in sample C of the surveyed stars, which was obtained in June 1999. The star now known as TRAPPIST-1 was discovered in 1999 by astronomer John Gizis and colleagues during a survey of close-by ultra-cool dwarf stars. Due to the possibility of several of the planets being habitable, the system has drawn interest from researchers and has appeared in popular culture. The planets have low densities they may consist of large amounts of volatile materials. It is unclear whether radiation emissions from TRAPPIST-1 would allow for such atmospheres. There is no evidence of an atmosphere on any one the planets. Up to four of the planets – designated d, e, f and g – orbit at distances where temperatures are suitable for the existence of liquid water, and are thus potentially hospitable to life. Their masses are comparable to that of Earth and they all lie in the same plane from Earth they seem to move past the disk of the star. They are likely tidally locked to TRAPPIST-1, such that one side of each planet always faces the star, leading to permanent day on one side and permanent night on the other. It takes the seven planets between about 1.5 and 19 days to orbit around the star in circular orbits. In 2017, further analysis of the original observations identified five more planets, of unknown types. Observations in 2016 from the Transiting Planets and Planetesimals Small Telescope (TRAPPIST) at La Silla Observatory in Chile and numerous other telescopes led to the discovery of two terrestrial planets in orbit around TRAPPIST-1. The discovery of the star was first published in 2000. It is estimated to be 7.6 billion years old, making it older than the Solar System. Its radius is slightly larger than Jupiter and it has a mass of about 9% of the Sun. It lies in the constellation Aquarius about 40.66 light-years away from Earth, with a surface temperature of about 2,566 kelvins (2,290 degrees Celsius 4,160 degrees Fahrenheit). TRAPPIST-1 is a cool red dwarf star noted for its seven known exoplanets. TRAPPIST-1 is within the red circle in the constellation Aquarius.ĢMUDC 12171, 2MASS J23062928–0502285, EPIC 246199087, K2-112, SPECULOOS-1, an internal name of the star used by the SPECULOOS project, as this star was its first discovery, and TRAPPIST-1a.
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