Question

Name a star having a system of planets with life on one of its planets

Answer 1

universal star or solar system

Answer 2

Kepler, which cost £395 million, was launched in March 2009 with the chief aim of searching for Earth-sized planets that might support life.Kepler used something known as the 'transit method' to detect extrasolar planets.A transit occurs when a planet crossesin front of its star as viewed by an observer.Transits by terrestrial planets produce a small change in a star's brightness lasting for one to 16 hours.Scientists believe this change must beperiodic if it is caused by a planet.They also claim that all transits produced by the same planet must be of the same change in brightness and last the same amount of time.Once Kepler detected a pattern such as this, scientists could calculate the planet's orbital size from how long it took for the planet to orbit once around the star.The size of the planet is found from how much the brightness of the star drops as well as the star's size.From the orbital size and the temperature of the star, the planet's characteristic temperature can be calculated.Knowing the temperature of a planet iskey to whether or not the planet is habitable.