Tech & Science: Astronomers discovered a gigantic planet that should not exist - - PressFrom - United Kingdom
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Tech & Science Astronomers discovered a gigantic planet that should not exist

19:15  01 october  2019
19:15  01 october  2019 Source:   cnet.com

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An artist's impression of the planet that should not exist , GJ 3512b. The existence of GJ 3512b puts into question the core accretion model, used to explain how planets in our solar system form. That model is widely accepted by scientists as an explanation for how terrestrial planets like Earth were

Mysterious planet similar to Jupiter. An international research consortium led by Spanish astronomers have discovered an unusual exoplanet that orbits around The Mysterious planet was discovered by a Spanish-German research consortium called Carmenes. The aim of Carmenes is to detect planets

An artist's impression of the planet that should not exist. © Provided by CBS Interactive Inc. An artist's impression of the planet that should not exist.

GJ 3512b is a planet roughly 284 trillion kilometers from Earth, and it's gigantic. So gigantic, in fact, that it shouldn't exist. At least, according to some currently held ideas about planets and how they form. 

But here we are. 

The discovery, published in the journal Science on Sept. 27, was made possible thanks to the Calar Alto, Sierra Nevada and Montsec Astronomical observatories in Spain and the Las Cumbres Observatory in California. 

The confusion is around GJ 3512b and how large it is compared to the star it orbits, an M-type red dwarf. This kind of star is quite small, traditionally one fifth the size of the sun and up to 50 times dimmer. For comparison, our sun weighs roughly 333,000 times more than Earth while GJ 3512b's star only weighs 270 times more. Jupiter, the largest planet in our solar system, weighs around 1,047 times less than the sun.

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Astronomers have spotted a huge planet that they thought would not be able to exist . The vast world – a Jupiter-like exoplanet that is 30 light-years away – could force us to Astronomers did not expect that such a small star would be able to serve as home to such a vast planet . We’ll tell you what’s true.

A disproportionate planet that should not be where it is! "The team of astronomers who discovered the planet for the first time wrote in the journal Science that the recently confirmed planet was not formed in the usual progressive way, where a solid nucleus of molten particles takes shape

Planet GJ 3512b is around half the size of Jupiter, but even then, it's only around 250 times less massive than its star. This is weird. According to existing models, that makes GJ 3512b way too big to be orbiting an M-type red dwarf of this size.

"Around such stars there should only be planets the size of the Earth or somewhat more massive Super-Earths," Christoph Mordasini, co-author of the study, told the BBC.

The existence of GJ 3512b puts into question the core accretion model, used to explain how planets in our solar system form. That model is widely accepted by scientists as an explanation for how terrestrial planets like Earth were formed. But GJ 3512b makes a very strong case for the "disk instability" model, a newer theory which lines up more consistently with the finding. 

"For the first time, we have accurately characterized an exoplanet that cannot be explained by the core accretion formation model," said lead author Juan Carlos Morales, speaking to Space. "This exoplanet proves that the gravitational instability model may play a role in the formation of giant planets."

'Improbable Planet' Somehow Survives Being Swallowed by Pulsing Star .
Scientists have discovered a "survivalist" planet that shouldn't exist orbiting a pulsating star. Using astroseismology data from NASA's Transiting Exoplanet Survey Satellite, or TESS, a team of researchers studying the red giant stars HD 212771 and HD 203949 detected oscillations, which are "gentle pulsations at the surfaces of stars," lead author Tiago Campante of the Instituto de Astrofísica e Ciências do Espaço (IA) and Faculdade de Ciências da Universidade do Porto, told Space.com. This is actually the first time that oscillations have been found by TESS in stars that host exoplanets.

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