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sábado, 24 de octubre de 2015

NASA : Mini Planetary System .- Mini Sistema Planetario

Hola amigos: A VUELO DE UN QUINDE EL BLOG., Esta concepción artística muestra un sistema de Itsy Bitsy planetaria - tan compacto, de hecho, que se parece más a Júpiter y sus lunas que una estrella y sus planetas. Los astrónomos que utilizan los datos de la misión Kepler de la NASA y los telescopios terrestres recientemente confirmaron que el sistema, llamado KOI-961, sede de los tres exoplanetas más pequeños conocidos hasta ahora en orbitar una estrella distinta de nuestro Sol. Un exoplaneta es un planeta que se encuentra fuera de nuestro sistema solar.
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Mini Planetary System
This artist's concept depicts an itsy bitsy planetary system - so compact, in fact, that it's more like Jupiter and its moons than a star and its planets. Astronomers using data from NASA's Kepler mission and ground-based telescopes recently confirmed that the system, called KOI-961, hosts the three smallest exoplanets known so far to orbit a star other than our sun. An exoplanet is a planet that resides outside of our solar system.

The star, which is located about 130 light-years away in the Cygnus constellation, is what's called a red dwarf. It's one-sixth the size of the sun, or just 70 percent bigger than Jupiter. The star is also cooler than our sun, and gives off more red light than yellow.

The smallest of the three planets, called KOI-961.03, is actually located the farthest from the star, and is pictured in the foreground. This planet is about the same size as Mars, with a radius only 0.57 times that of Earth. The next planet to the upper right is KOI-961.01, which is 0.78 times the radius of Earth. The planet closest to the star is KOI-961.02, with a radius 0.73 times the Earth's.

All three planets whip around the star in less than two days, with the closest planet taking less than half a day. Their close proximity to the star also means they are scorching hot, with temperatures ranging from 350 to 836 degrees Fahrenheit (176 to 447 degrees Celsius). The star's habitable zone, or the region where liquid water could exist, is located far beyond the planets.

The ground-based observations contributing to these discoveries were made with the Palomar Observatory, near San Diego, Calif., and the W.M. Keck Observatory atop Mauna Kea in Hawaii.

Image credit: NASA/JPL-Caltech
Last Updated: Oct. 22, 2015
Editor: NASA Administrator
Tags:  Distant Planets, Kepler and K2,
Guillermo Gonzalo Sánchez Achutegui
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