Astrometry nabs an exoplanet

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Astrometry nabs an exoplanet

Mensaje por AfricanCamelHumper » Junio 3, 2009, 11:46 am

Long-proposed search method finally finds what it’s been looking for
By Ron Cowen
Web edition : Monday, June 1st, 2009

Researchers for half a century have tried — and failed — to use the motion of stars moving across the sky to discover planets that lie beyond the solar system. Now a team has finally used the method, known as astrometry, to find one of these orbs. The newfound extrasolar planet, six times heavier than Jupiter, orbits the low-mass star VB 10 some 20 light-years from Earth, report Steven Pravdo and Stuart Shaklan of NASA’s Jet Propulsion Laboratory in Pasadena, Calif., in the July Astrophysical Journal.

The traditional method of identifying extrasolar planets, which now number more than 350, relies on tracking the velocity of a parent star along the line of sight to Earth — rather than across the sky. Because an orbiting planet pulls its parent star ever so slightly to and fro, the star’s line-of-sight motion speeds up and slows down periodically, revealed by telltale shifts in the color of starlight recorded from Earth. This technique, known as the wobble or Doppler shift method, detects heavyweights that lie close to their star most easily, since such planets produce the largest changes in that star’s speed along the line of sight to Earth. But the method can only reveal the minimum mass of a planet.

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[color=#000080]Abraham Lincoln - "Better to remain silent and be thought a fool than to speak out and remove all doubt."[/color]
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Re: Astrometry nabs an exoplanet

Mensaje por BurronAzul » Junio 3, 2009, 5:51 pm

El problema con todos estos planetas es que tienen una masa enorme y no pueden soportar vida como la que conocemos en la tierra.
LET NO ONE WHO IS IGNORANT OF MATHEMATICS PROCEED ANY FURTHER - Plato (427-347 BCE)
EVERYTHING SHOULD BE MADE AS SIMPLE AS POSSIBLE, BUT NOT ANY SIMPLER - A. Einstein (1879-1955)
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Re: Astrometry nabs an exoplanet

Mensaje por zoroastro » Junio 5, 2009, 9:23 am

We could always mine them. :D

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Re: Astrometry nabs an exoplanet

Mensaje por Cartagena » Junio 5, 2009, 10:47 am

Con todos los problemas que tenemos en este planeta y nos empeñamos en buscar otros.
No hay quien entienda a esta gente.
[color=#4000BF]No es lo mismo estar jodido que estar jodiendo.[/color]

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Re: Astrometry nabs an exoplanet

Mensaje por AfricanCamelHumper » Junio 19, 2009, 5:52 pm

Carta pero entiende que buscando otros puedes crear problemas en los otros y asi alivias los de aqui :D
[color=#000080]Abraham Lincoln - "Better to remain silent and be thought a fool than to speak out and remove all doubt."[/color]
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[size=150][color=#400080]La Came[/color][/size] :mrgreen:

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