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Science-Technology
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Title: Mystery 'noise' could be an Earth-like world: Strange signals suggest habitable planet exists 22 light years away
Source: Daily Mail Online
URL Source: http://www.dailymail.co.uk/sciencet ... xists-22-light-years-away.html
Published: Mar 7, 2015
Author: Ellie Zolfagharifard
Post Date: 2015-03-07 20:11:57 by cranky
Keywords: None
Views: 987
Comments: 4

  • Gliese 581d is in star's habitable zone and may be suitable for humans
  • Found in 2010, it was later dismissed as stellar bursts and not a planet
  • Now, scientists believe earlier analysis was based on inaccurate data
  • They say planet does exist and may provide hope for finding alien life

Astronomers believe mysterious signals - previously dismissed as stellar bursts - are coming from an Earth-like planet.

The Gliese 581d planet has conditions that could support life, and is likely to be a rocky world, twice the size of Earth.

Signals from the planet were initially discovered in 2010, but last year dismissed as noise from distant stars.

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Astronomers believe mysterious 'alien signals' - previously dismissed as stellar bursts - are in fact coming from an Earth-like planet. The Gliese 581d planet was initially discovered in 2010 (artist's impression pictured)

Astronomers believe mysterious 'alien signals' - previously dismissed as stellar bursts - are in fact coming from an Earth-like planet. The Gliese 581d planet was initially discovered in 2010 (artist's impression pictured)

Now, a further study claims that the 2014 research was based on 'inadequate analyses of the data' and that Gliese 581d does exist.

CONTROVERSY AROUND GLIESE 581D: IS IT REALLY A PLANET?

The planet was initially discovered in 2010. It was the first Earth-like planet found in the 'Goldilocks'-zone around another star.

But soon after the discovery, a group of scientists said the signals thought to be from a planet were in fact simply magnetic bursts from stars.

The latest study claims that the stellar bursts research was based on 'inadequate analyses of the data'.

They said the method is suitable for large planets, but the technique is unable to find small planets like GJ 581d.

Last year, Pennsylvania State University researchers said Gliese 581d - and its companion Gliese 581g - were simply a trick of the light caused by magnetic bursts from a local star 22 light-years away.

The new British research, however, argues the method used by the Pennsylvania team was only suitable for large planets, and that it could miss small ones like GJ 581d.

The study, by Queen Mary University, London and the University of Hertfordshire, claims to use a more accurate model on the existing data.

'The existence (or not) of GJ 581d is significant because it was the first Earth-like planet discovered in the 'Goldilocks'-zone around another star and it is a benchmark case for the Doppler technique,' said lead author, Dr Guillem Anglada-Escudé.

'There are always discussions among scientists about the ways we interpret data but I'm confident that GJ 581d has been in orbit around Gliese 581 all along.

'In any case, the strength of their statement was way too strong.

'If their way to treat the data had been right, then some planet search projects at several ground-based observatories would need to be significantly revised as they are all aiming to detect even smaller planets.

The Gliese 581d planet is likely to be a rocky world, twice the size of Earth. Pictured is an artist's impression of the planetary orbits of the Gliese 581 system compared to those of our own solar system

The Gliese 581d planet is likely to be a rocky world, twice the size of Earth. Pictured is an artist's impression of the planetary orbits of the Gliese 581 system compared to those of our own solar system

'WE'LL FIND AN EXACT REPLICA OF EARTH IN 15 YEARS', SAYS NASA

According to one of Nasa's top planet hunters, we will find a planet with oceans like Earth in the next 15 years.

Dr John Mather is an astrophysicist at the Nasa Goddard Space Flight Center in Maryland, and the senior project scientist on the James Webb Space Telescope (JWST).

The giant telescope will be used to find the first bright objects that formed in the universe, figure out how galaxies evolved and find out how stars formed.

But perhaps most excitingly, it will study Earth-like worlds beyond our solar system.

'We hope to find a planet that's Earth-like and measure its atmosphere to work out if it has enough water on it to make an ocean,' he said in an interview with

'I think that will be in around ten to 15 years from now.

'In that time we might be able to say: 'I can see that star over there. [Its planet] has a climate that's like Earth and it might have life on it.'

'One needs to be more careful with these kind of claims'

GJ 581d is believed to be the first planet outside our solar system in the Goldilocks zone around its star – an area not too hot and not too cold for life.

To find Gliese 581d, University of California, Santa Cruz astronomers originally looked for subtle changes in light caused by the gravity of an orbiting planet tugging back and forth on the star.

The strength of the tugging, they believed, showed them a planet was about three times as massive as Earth.

At the time, the discovery of Earth-like planets around Gliese 581 caught the public imagination.

Documentary-maker RDF and social-networking site Bebo used a radio telescope in Ukraine to send a powerful focused beam of information - 500 messages from the public in the form of radio waves - to Gliese 581.

And the Australian science minister at the time organised 20,000 users of Twitter to send messages towards the distant solar system in the wake of the discoveries.

Other exoplanets have previously been doubted, most notably Alpha Centauri Bb, the closest Earth-sized world to us, which some scientists claim could just be noise in the data.

Gliese 581 (the bright star shown in the centre), which is 22 light-years away, has three other confirmed planets, none of which lie within its habitable zone

Gliese 581 (the bright star shown in the centre), which is 22 light-years away, has three other confirmed planets, none of which lie within its habitable zone

(3 images)

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#1. To: cranky (#0)

This is so thin on hard facts that it's hard to consider it a science article.

It seems more like NASA propaganda, intended to gull the public into supporting the search for Earth-like worlds.

They can't even demonstrate this supposed planet exists and are not certain that its signal is anything more than star farts from its sun.

I think our instrumentality to locate and study extrasolar planets is inadequate to the task. NASA knows a lot less than they are willing to admit. It amounts to a lot of creative lying. Perhaps they've noticed how the global hottists have parleyed their "science" into a confidence racket and hope to copy their funding success.

Tooconservative  posted on  2015-03-07   20:28:04 ET  Reply   Trace   Private Reply  


#2. To: TooConservative (#1)

Wow!
Billions and Billions of star farts!
(As Carl Sagan would have said...)

Chuck_Wagon  posted on  2015-03-08   12:35:06 ET  Reply   Trace   Private Reply  


#3. To: TooConservative, GarySpFc, Vicomte13, liberator (#1)

This is so thin on hard facts that it's hard to consider it a science article.

That pretty much sums up post-modern 'science.'

"Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever." (1 Peter 1:23)

redleghunter  posted on  2015-03-08   12:48:39 ET  Reply   Trace   Private Reply  


#4. To: cranky (#0)

Mystery 'noise' could be an Earth-like world: Strange signals suggest habitable planet exists 22 light years away

Any planet that generates that much noise is suggestive of evolution of an advance enough group of organisms so that they can elect degenerate politicians to make the noise.

rlk  posted on  2015-03-09   11:30:20 ET  Reply   Trace   Private Reply  


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