Suicidal planet seems on death spiral into star
By Seth Borenstein | USAToday.com
Astronomers have found what appears to be a gigantic suicidal planet.
The odd, fiery planet is so close to its star and so large that it is triggering tremendous plasma tides on the star. Those powerful tides are in turn warping the planet's zippy less-than-a-day orbit around its star.
The result: an ever-closer tango of death, with the planet eventually spiraling into the star.
It is a slow death. The planet WASP-18b has maybe a million years to live, said planet discoverer Coel Hellier, a professor of astrophysics at Keele University in England. Hellier's report on the suicidal planet is in Thursday's issue of the journal Nature.
"It's causing its own destruction by creating these tides," Hellier said.
The star is called WASP-18 and the planet is WASP-18b because of the Wide Angle Search for Planets team that found them.
The planet circles a star that is in the constellation Phoenix and is about 325 light-years away from Earth, which means it is in Earth's galactic neighborhood. A light-year is about 5.8 trillion miles.
The planet is 1.9 million miles (3 million kilometers) from its star, 1/50th of the distance between Earth and its star, the sun. And because of that the temperature is about 3,800 degrees (2,100 Celsius).
Its size — 10 times bigger than Jupiter — and its proximity to its star make it likely to die, Hellier said.
Think of how the distant moon pulls Earth's oceans to form twice-daily tides. The effect the odd planet has on its star is thousands of times stronger, Hellier said. The star's tidal bulge of plasma may extend hundreds of miles, he said.
Like most planets outside Earth's solar system, this planet was not seen directly by a telescope. Astronomers found it by seeing dips in light from the star every time the planet came between the star and Earth.
So far astronomers have found more than 370 planets outside the solar system. This one is "yet another weird one in the exoplanet menagerie," said planet specialist Alan Boss of the Carnegie Institution of Washington.
It is so unusual to find a suicidal planet that University of Maryland astronomer Douglas Hamilton questioned whether there was another explanation. While it is likely that this is a suicidal planet, Hamilton said it also is possible that some basic physics calculations that all astronomers rely on could be dead wrong.
The answer will become apparent in less than a decade if the planet seems to be further in a death spiral, he said.
Article from: USAToday.com
Image credit: CARREAU/ESA/Nature
Planet orbits the wrong way
Scientists uncover lost Venetian city
Planet twice as big as Earth discovered
Quest to find life beyond our planet gets technological boosts
Hello from Earth: Send a Message to a Nearby Planet
NASA uses probes to hunt for ancient planet that may prove Earth moon origins
Nasa's planet hunter seeks new earths
Mysterious changes seen on distant dwarf planet
First-ever images taken of extrasolar planets
Latest News from our Front Page
ABC Is Hiding Details of Killer Vester Flanagan's Manifesto ...(Must Be Littered With Liberal Propaganda)
Killer Vester Flanagan was a big Obama supporter.
But, you’d never know it from the liberal media.
The media is hiding Flanagan’s political leanings from the American public.
ABC has yet to release Flanagan’s manifesto.
It must be littered with embarrassing liberal propaganda.
The Tatler reported, via Instapundit:
Two days ago, ABC News reported that Vester Flanagan, the murderer of two WDBJ employees, sent a 23-page ...
Austria, Libya count dead as number of migrants crossing Mediterranean soars
Austria said on Friday 71 refugees including a baby girl were found dead in an abandoned freezer truck, while Libya recovered the bodies of 82 migrants washed ashore after their overcrowded boat sank on its way to Europe and scores more were feared dead.
The U.N. refugee agency said the number of refugees and migrants crossing the Mediterranean to reach Europe ...
Financial Times Calls For Abolishing Cash
liminating physical currency necessary to give central banks more power
The Financial Times has published an anonymous article which calls for the abolition of cash in order to give central banks and governments more power.
Entitled The case for retiring another ‘barbarous relic’, the article laments the fact that people are stockpiling cash in anticipation of another economic collapse, a factor which ...
Serbian government bans anti-mass immigration protests, and plans ahead for mass immigration
Nebojsa Stefanovic, Serbia’s Interior Minister said protesters who are concerned about “an EU plan” to settle thousands of illegal immigrants into the country, will not be allowed to voice their concerns in a protest march on Monday, 31st of August.
“We will not allow the expression of intolerance and hatred to be something that is characteristic of Serbia” said Stefanovic.
“The Ministry ...
Germany asks Facebook to remove 'racist' anti-migrant posts
Heiko Maas, Germany's justice minister, says social network should remove xenophobic posts in the same way it deals with nudity
Germany is calling on Facebook to remove “xenophobic and racist” anti-migrant posts from its website and apps.
Heiko Maas, the German justice minister, has written to the company to demand an urgent review of its policy over hate messages.
“Photos of certain ...
|More News » |