TrES-1b

TrES-1b is an extrasolar planet, orbiting the star GSC 02652-01324 in the constellation Lyra. It is located about 500 light years from Earth.

Due to its mass and radius, the planet is most likely a Jovian planet, with a composition similar to that of Jupiter. It has a surface temperature of about 1060 K, due to its close proximity to its star (it is only 4% of the distance between the Earth and the Sun), which is why it is classified as a hot Jupiter.

It was discovered on August 24, 2004, thanks to the group of astronomers Roi Alonso, Juan Antonio Belmonte and Hans Deeg from the Institute of Astrophysics of the Canary Islands, through observations from the Las Cañadas del Teide observatory, in Tenerife, Spain. The transit method was used, an indirect method consisting of measuring the light emitted by a star and then studying it in search of objects that pass between the point of light and the observer (causing decreases in the intensity of the light of the star that reaches Earth). Thanks to this method, not only can the existence of celestial bodies be known, as long as they are in an orbital plane close to the line of sight from the Earth, but information can also be obtained about their composition, atmosphere, etc. This planet was discovered with a telescope of only 10 cm in diameter, being the extrasolar planet discovered with a smallest telescope to date (August 2005). In addition, it was the first planet with a bright star discovered through the transit method, which has made TrES-1 one of the best known extrasolar planets today. On March 22, 2005, NASA published observations of this object by the Spitzer space telescope, determining its albedo, 0.3, and its temperature, something that had not been done to date.