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Astronomers Find Double-Planet, Double-Star System



 
 
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  #1  
Old August 29th 12, 05:45 PM posted to sci.physics,sci.physics.relativity,sci.astro
Yousuf Khan[_2_]
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Default Astronomers Find Double-Planet, Double-Star System

http://www.wired.com/wiredscience/20...t-double-star/

Astronomers have published a study revealing that NASA’s exoplanet-hunting Kepler telescope has spotted two planets orbiting two suns for the first time.

The find proves that circumbinary planetary systems can not only form in, but continue to withstand, the intense pressures exerted by a binary star system — until now, astronomers had only been able to identify binary star systems with one planet in orbit, a find that was confirmed in 2011 when Kepler-16b was spotted.

“The presence of a full-fledged circumbinary planetary system orbiting Kepler-47 is an amazing discovery,” commented Greg Laughlin, professor of astrophysics and planetary science at the University of California, in a press release. “These planets are very difficult to form using the currently accepted paradigm, and I believe that theorists, myself included, will be going back to the drawing board to try to improve our understanding of how planets are assembled in dusty circumbinary disks.”


They've found single planets orbiting double-stars before, now is the
first time they found two planets orbiting double-stars. Not sure why
the physics of this was considered so onerous before, but there you go.

Yousuf Khan
  #2  
Old August 29th 12, 06:38 PM posted to sci.physics,sci.physics.relativity,sci.astro
Lord Androcles, Zeroth Earl of Medway
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Default Astronomers Find Double-Planet, Double-Star System

"Yousuf Khan" wrote in message ...

http://www.wired.com/wiredscience/20...t-double-star/

Astronomers have published a study revealing that NASA’s exoplanet-hunting
Kepler telescope has spotted two planets orbiting two suns for the first
time.


Bwahahahaha!

http://faculty.ifmo.ru/butikov/Proje...llection1.html

Those are not astronomers, those are egotistical ****wits.

-- Lord Androcles, Zeroth Earl of Medway

  #3  
Old September 1st 12, 05:00 PM posted to sci.physics,sci.physics.relativity,sci.astro
Pete Weber
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Default Astronomers Find Double-Planet, Double-Star System

On Wed, 29 Aug 2012 12:45:19 -0400, Yousuf Khan wrote:

http://www.wired.com/wiredscience/20...t-double-star/

Astronomers have published a study revealing that NASA’s
exoplanet-hunting Kepler telescope has spotted two planets orbiting two
suns for the first time.

The find proves that circumbinary planetary systems can not only form
in, but continue to withstand, the intense pressures exerted by a
binary star system — until now, astronomers had only been able to
identify binary star systems with one planet in orbit, a find that was
confirmed in 2011 when Kepler-16b was spotted.

“The presence of a full-fledged circumbinary planetary system orbiting
Kepler-47 is an amazing discovery,” commented Greg Laughlin, professor
of astrophysics and planetary science at the University of California,
in a press release. “These planets are very difficult to form using the
currently accepted paradigm, and I believe that theorists, myself
included, will be going back to the drawing board to try to improve our
understanding of how planets are assembled in dusty circumbinary
disks.”


They've found single planets orbiting double-stars before, now is the
first time they found two planets orbiting double-stars. Not sure why
the physics of this was considered so onerous before, but there you go.

Yousuf Khan


Earth-moon is a double planet
  #4  
Old September 2nd 12, 06:40 PM posted to sci.physics,sci.physics.relativity,sci.astro
Brad Guth[_3_]
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Default Astronomers Find Double-Planet, Double-Star System

On Sep 1, 9:00*am, Pete Weber wrote:
On Wed, 29 Aug 2012 12:45:19 -0400, Yousuf Khan wrote:
http://www.wired.com/wiredscience/20...t-double-star/


Astronomers have published a study revealing that NASA’s
exoplanet-hunting Kepler telescope has spotted two planets orbiting two
suns for the first time.


The find proves that circumbinary planetary systems can not only form
in, but continue to withstand, the intense pressures exerted by a
binary star system — until now, astronomers had only been able to
identify binary star systems with one planet in orbit, a find that was
confirmed in 2011 when Kepler-16b was spotted.


“The presence of a full-fledged circumbinary planetary system orbiting
Kepler-47 is an amazing discovery,” commented Greg Laughlin, professor
of astrophysics and planetary science at the University of California,
in a press release. “These planets are very difficult to form using the
currently accepted paradigm, and I believe that theorists, myself
included, will be going back to the drawing board to try to improve our
understanding of how planets are assembled in dusty circumbinary
disks.”


They've found single planets orbiting double-stars before, now is the
first time they found two planets orbiting double-stars. Not sure why
the physics of this was considered so onerous before, but there you go.


* *Yousuf Khan


Earth-moon is a double planet


Very good point, as are most captured moons.

Could an existing solar system like ours capture a red dwarf without
causing too much trauma for the existing planets? (seem rather
unlikely, as even capturing another Jupiter mass would likely spell
the demise of most all planets of our inner solar system, although
outer planets [those past Saturn] may do just fine unless hit by
debris from inner planet collisions)
  #5  
Old September 2nd 12, 06:48 PM posted to sci.physics,sci.physics.relativity,sci.astro
Sam Wormley[_2_]
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Default Astronomers Find Double-Planet, Double-Star System

On 9/2/12 12:40 PM, Brad Guth wrote:
Could an existing solar system like ours capture a red dwarf without
causing too much trauma for the existing planets?


If the sun encountered another star (say a red dwarf) the Keplerian
orbit of each would be hyperbolic for each star and the encounter
would be one time. Capture requires, perhaps a third star or transfer
of momentum via drag. So it very unlikely that our sun would capture
a red dwarf.


  #6  
Old September 4th 12, 03:06 PM posted to sci.physics,sci.physics.relativity,sci.astro
Brad Guth[_3_]
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Default Astronomers Find Double-Planet, Double-Star System

On Sep 2, 10:48*am, Sam Wormley wrote:
On 9/2/12 12:40 PM, Brad Guth wrote:

Could an existing solar system like ours capture a red dwarf without
causing too much trauma for the existing planets?


* *If the sun encountered another star (say a red dwarf) the Keplerian
* *orbit of each would be hyperbolic for each star and the encounter
* *would be one time. Capture requires, perhaps a third star or transfer
* *of momentum via drag. So it very unlikely that our sun would capture
* *a red dwarf.


I can agree with that, although the nearby encounter with Sirius might
not count as a capture of our solar system by the superior mass of
Sirius, and yet it certainly could represent a cosmological cycle of
an encounter worthy of melting the last portions of ice on Earth.

However, if the encounter with a red dwarf included its lithobraking
via Saturn or Jupiter, as such could allow for the capture. There are
computer simulators that'll help demonstrate this and other possible
methods of our solar system capturing another sun, or that of our
solar system being captured by something else.



  #7  
Old September 4th 12, 04:20 PM posted to sci.astro
dlzc
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Posts: 1,426
Default Astronomers Find Double-Planet, Double-Star System

Dear Brad Guth:

On Tuesday, September 4, 2012 7:07:01 AM UTC-7, Brad Guth wrote:
....
However, if the encounter with a red dwarf
included its lithobraking via Saturn or Jupiter,
as such could allow for the capture.


Nope. "Conservation of angular momentum". Were the red dwarf to come close enough to either of those two gas giants, it would consume them, and the Sun would have one less gas giant as it went back out-system.

David A. Smith
  #8  
Old September 5th 12, 01:50 AM posted to sci.physics,sci.physics.relativity,sci.astro
Yousuf Khan[_2_]
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Posts: 1,692
Default Astronomers Find Double-Planet, Double-Star System

On 01/09/2012 12:00 PM, Pete Weber wrote:
Earth-moon is a double planet


Not that kind of a double planet, they're just talking about finding two
separate planets in orbit around a double-star system.

Yousuf Khan
  #9  
Old September 5th 12, 01:52 AM posted to sci.physics,sci.physics.relativity,sci.astro
Yousuf Khan[_2_]
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Posts: 1,692
Default Astronomers Find Double-Planet, Double-Star System

On 02/09/2012 1:40 PM, Brad Guth wrote:
Could an existing solar system like ours capture a red dwarf without
causing too much trauma for the existing planets? (seem rather
unlikely, as even capturing another Jupiter mass would likely spell
the demise of most all planets of our inner solar system, although
outer planets [those past Saturn] may do just fine unless hit by
debris from inner planet collisions)


No, capturing something like a star would require the ejection of a
planet, perhaps several planets. Namely the more massive gas planets.

Yousuf Khan
  #10  
Old September 10th 12, 01:05 AM posted to sci.astro
Brad Guth[_3_]
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Posts: 15,175
Default Astronomers Find Double-Planet, Double-Star System

On Sep 4, 8:20*am, dlzc wrote:
Dear Brad Guth:

On Tuesday, September 4, 2012 7:07:01 AM UTC-7, Brad Guth wrote:

...

However, if the encounter with a red dwarf
included its lithobraking via Saturn or Jupiter,
as such could allow for the capture.


Nope. *"Conservation of angular momentum". *Were the red dwarf to come close enough to either of those two gas giants, it would consume them, and the Sun would have one less gas giant as it went back out-system.

David A. Smith


Your purely subjective based naysay is noted. According to those of
your kind, it's impossible for our satellites to orbit anything they
encounter, such as our moon or mars.

Computer simulators of captures tend to disagree with your automatic
naysay. Of course mainstream obfuscate in order to exclude enough
evidence, and you're good to go.
 




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