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Viernes, 18 de agosto de 2006 - 16:54 GMT
El Sistema Solar suma tres planetas
Plutón y Charon
Plutón fue descubierto en 1930 por Clyde Tombaugh.

Planets plan increases total to 12

The International Astronomical Union has published its definition of a Planet. Under this definition Pluto will be a Planet as will its "moon" Charon and two others UB313 And Ceres. This report by Pallab Ghosh.

Critics of Pluto say that it's little more than one of the larger icy lumps of rock that orbit at the fringes of our solar system and they argued that it should be stripped of its planetary status.

The debate took a new twist earlier this year when astronomers calculated that another far flung object called UB313 was slightly larger than Pluto, so should that be called a planet too?

Now, after years of deliberation, a committee of astronomers have come up with a scientific definition of a planet. They say that it's something that's round (because of its gravity) and orbits the Sun. If approved, this will mean that Pluto keeps its planetary status. But it will also mean that its large moon Charon is also upgraded to planetary status as are UB313 and an erstwhile planetoid called Ceres.

That takes the total number of planets in our solar system to 12. With better telescopes that's likely to rise yet further as more worlds are discovered in the future.

Pallab Ghosh, BBC

VOCABULARY

at the fringes of
en los bordes o márgenes de

stripped of
quitar su estatus (de planeta)

far flung object
un objeto remoto

deliberation
una discusión o debate formal

orbits the Sun
gira alrededor del Sol, hace una órbita

planetary status
estatus de planeta

erstwhile
antiguo (ej: antiguamente conocido como)

telescopes
telescopios

are discovered
sean descubiertos



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Report by: Pallab Ghosh



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