Kepler-47: A Transiting Circumbinary Multiplanet System
Dataon Kepler 47 G2
- Astronomers detected two planets in the Kepler-47 system, a pair of orbiting stars that eclipse each other every 7.5 days from our vantage point on Earth. One star is similar to the sun in size, but only 84 percent as bright. The second star is diminutive, measuring only one-third the size of the sun and less than 1 percent as bright.
- A subsequent double-star system was announced in January 2012 and multiple planets orbiting multiple stars — the Kepler-47 system — was announced in August 2012. In December 2011, NASA announced that Kepler had found its first planet, Kepler-22b, in the habitable zone of a star.
- The Kepler-47 G2 is a validated Azure Stack HCI solution, designed to help customers consolidate virtualized workloads and gain cloud effi ciencies on-premises in a hyper-converged environment. It features the same Hyper-V based software-defi ned compute.
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Abstract
We report the detection of Kepler-47, a system consisting of two planets orbiting around an eclipsing pair of stars. The inner and outer planets have radii 3.0 and 4.6 times that of Earth, respectively. The binary star consists of a Sun-like star and a companion roughly one-third its size, orbiting each other every 7.45 days. With an orbital period of 49.5 days, 18 transits of the inner planet have been observed, allowing a detailed characterization of its orbit and those of the stars. The outer planet’s orbital period is 303.2 days, and although the planet is not Earth-like, it resides within the classical “habitable zone,” where liquid water could exist on an Earth-like planet. With its two known planets, Kepler-47 establishes that close binary stars can host complete planetary systems.
Kepler 47b
- ASTRONOMY;
- Astrophysics - Solar and Stellar Astrophysics;
- Astrophysics - Earth and Planetary Astrophysics
Artist's interpretation of the Kepler-47 binary star system and the two planets that have been found orbiting around it.
Kepler 47-c
Kepler-47 is a remote eclipsing binary star system around which has been found two planets. Fireboy and watergirl in the forest templegamerate.
Kepler-47 lies about 5,000 light-years away in the constellation Cygnus. It consists of two stars, very close together, which circle around each other every 7.5 days. One of the stars resembles the Sun, while the other other is only about a third the size of its companion and 175 times fainter.
Observations by NASA's Kepler spacecraft have revealed the presence of two planets. The inner planet, Kepler-47b, is about three times larger than the Earth and takes 49 days to complete an orbit; the outer planet, Kepler-47c, is just a bit bigger than Uranus, and has a 'year' lasting 303 days. Although the path of the outer planet places it in the habitable zone of its star system, its size suggests that it is a gas giant and thus itself probably unsuitable for life as we know it. However, any large moons around Kepler-47c may off thee possibility of habitable environments.
About usmacquarie island. Although other planets have been found around binary stars, this is the first known instance of two planets in orbit around a binary and adds to the evidence that not only can planets exist in stable orbits in such a situation but that the presence of life, too, is not out of the question. [1]
reference
Kepler 47 Sun
1. Orosz, J. A., et al. 'Kepler-47: a transiting circumbinary multiplanet system'. Science DOI: 10.1126/science.1228380. Published online August 28, 2012.