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 Post subject: The Search for the Solar System's Lost Planet
PostPosted: Wed Apr 15, 2009 11:02 pm 
The Lord of Destruction
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Yahoo! News wrote:
The Search for the Solar System's Lost Planet
Clara Moskowitz
Staff Writer SPACE.com
space.com – Mon Apr 13, 3:19 pm ET



The solar system might once have had another planet named Theia, which may have helped create our own planet's moon.

Now two spacecraft are heading out to search for leftovers from this rumored sibling, which would have been destroyed when the solar system was still young.

"It's a hypothetical world. We've never actually seen it, but some researchers believe it existed 4.5 billion years ago — and that it collided with Earth to form the moon," said Mike Kaiser, a NASA scientist at the Goddard Space Flight Center in Maryland.

Theia is thought to have been about Mars-sized. If the planet crashed into Earth long ago, debris from the collision could have clumped together to form the moon. This scenario was first conceived by Princeton scientists Edward Belbruno and Richard Gott.

Many researchers now figure that indeed some large object crashed into Earth, and the resulting debris coalesced to form the moon. It is unclear though if that colliding object was a planet, asteroid or comet.

In any case, the debris that would have spun out from the two slamming bodies would have mixed together, and could explain some aspects of the moon's geology, such as the size of the moon's core and the density and composition of moon rocks.

Scientists are hoping NASA's twin STEREO probes, launched in 2006, will be able to discover leftover traces of Theia that may finally help close the case on the birth of our moon.

So far, signs of Theia have proved elusive to telescopes searching from Earth. But the STEREO spacecraft are set to enter special points in space, called Lagrangian points, where the gravity from the Earth and the sun combine to form wells that tend to collect solar system detritus. [Click here for an animation that explains Lagrangian points.]

"The STEREO probes are entering these regions of space now," Kaiser, a STEREO project scientist, said. "This puts us in a good position to search for Theia's asteroid-sized leftovers."

By visiting the Lagrangian points directly, STEREO will be able to hunt for Theia chunks up close. The nearest approach to the bottoms of the gravitational wells will come in September and October 2009.

"STEREO is a solar observatory," Kaiser said. "The two probes are flanking the sun on opposite sides to gain a 3-D view of solar activity. We just happen to be passing through the L4 and L5 Lagrange points en route. This is purely bonus science."

Scientists think Theia may even have formed in one of these gravitational points of balance from the accumulation of flotsam that had built up there.

"Computer models show that Theia could have grown large enough to produce the moon if it formed in the L4 or L5 [Lagrangian] regions, where the balance of forces allowed enough material to accumulate," Kaiser said. "Later, Theia would have been nudged out of L4 or L5 by the increasing gravity of other developing planets like Venus and sent on a collision course with Earth."


Source


No, Bill... they aren't looking for Uranus. :wink:


:BB Space Oddity

_________________
"I told you... that we could fly... 'Cause we all have wings... but some of us don't know why..."
~ Michael Hutchens (RIP)


"Life is what happens to you while you're busy making other plans..."
~ John Lennon (RIP)


"Don't get cute... Don't get funny now... It's later than you think..."
~ Greg Kihn


"As we celebrate mediocrity... all the boys upstairs wanna see...
How much you'll pay... for what you used to get for free..."

~ Tom Petty


Image

"I think you'd better ask yourself... before you criticize me...
Are you a victim of the System... or the Powers-That-Be?
If there was nothing to gain... would you do it for free?"

~ Sammy Hagar


"I was glad to come... I'll be sad to go... So while I'm here... I'll have me a real good time..."
~ Rod Stewart (The Faces)


"The earth can shake... The sky come down... The mountains all... fall to the ground...
But I will fear... none of these things... Shelter me, Lord... underneath your wings..."

~ Buddy Miller


"Rock hard... Ride free... All your life..."
~ Rob Halford


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Thu Apr 16, 2009 12:27 am 
Heavy Metal Honey
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RockHard wrote:
Yahoo! News wrote:
The Search for the Solar System's Lost Planet
Clara Moskowitz
Staff Writer SPACE.com
space.com – Mon Apr 13, 3:19 pm ET


"STEREO is a solar observatory," Kaiser said. "The two probes are flanking the sun on opposite sides to gain a 3-D view of solar activity. We just happen to be passing through the L4 and L5 Lagrange points en route. This is purely bonus science."

Source


No, Bill... they aren't looking for Uranus. :wink:


:BB Space Oddity


1: What does he mean by 'bonus science'?
2: Flanking the sun? How close are they to the sun and how close can they get?
3: Think this NASA rep, Kaiser, is a :rush: fan too?


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Thu Apr 16, 2009 6:20 pm 
The Lord of Destruction
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fruitless endeavor wrote:
RockHard wrote:
Yahoo! News wrote:
The Search for the Solar System's Lost Planet
Clara Moskowitz
Staff Writer SPACE.com
space.com – Mon Apr 13, 3:19 pm ET


"STEREO is a solar observatory," Kaiser said. "The two probes are flanking the sun on opposite sides to gain a 3-D view of solar activity. We just happen to be passing through the L4 and L5 Lagrange points en route. This is purely bonus science."

Source


No, Bill... they aren't looking for Uranus. :wink:


:BB Space Oddity


1: What does he mean by 'bonus science'?
2: Flanking the sun? How close are they to the sun and how close can they get?
3: Think this NASA rep, Kaiser, is a :rush: fan too?


1.) "Bonus Science": A stroke of luck or fortunate set of circumstances that will give them an advantage or unique opportunity to perform experiments under a rare set of parameters.
2.) No help there, sorry.
3.) If he's worth a shit, absolutely. :wink:


:BB Digital Man

_________________
"I told you... that we could fly... 'Cause we all have wings... but some of us don't know why..."
~ Michael Hutchens (RIP)


"Life is what happens to you while you're busy making other plans..."
~ John Lennon (RIP)


"Don't get cute... Don't get funny now... It's later than you think..."
~ Greg Kihn


"As we celebrate mediocrity... all the boys upstairs wanna see...
How much you'll pay... for what you used to get for free..."

~ Tom Petty


Image

"I think you'd better ask yourself... before you criticize me...
Are you a victim of the System... or the Powers-That-Be?
If there was nothing to gain... would you do it for free?"

~ Sammy Hagar


"I was glad to come... I'll be sad to go... So while I'm here... I'll have me a real good time..."
~ Rod Stewart (The Faces)


"The earth can shake... The sky come down... The mountains all... fall to the ground...
But I will fear... none of these things... Shelter me, Lord... underneath your wings..."

~ Buddy Miller


"Rock hard... Ride free... All your life..."
~ Rob Halford


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Fri Apr 17, 2009 9:45 am 
Heavy Metal Cyber-Sleuth
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Facebook: sucks royal ass!
Dammit, Steve! The headline alone got me all primed for another Uranus reference and you stole it from me! :bat:

_________________
Milk, milk, lemonade,
round the back fudge is made.


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Fri Apr 17, 2009 9:58 pm 
The Lord of Destruction
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Joined: Mon May 08, 2006 11:51 pm
Posts: 31626
Location: South of Heaven
Favorite Band: Pinkmaiden Rainsabbath Zeppepriest
bildo wrote:
Dammit, Steve! The headline alone got me all primed for another Uranus reference and you stole it from me! :bat:


I know. :lol:

Stealing your thunder ain't easy. Gotta take the easy lay-up. :wink:


:BB Steve

_________________
"I told you... that we could fly... 'Cause we all have wings... but some of us don't know why..."
~ Michael Hutchens (RIP)


"Life is what happens to you while you're busy making other plans..."
~ John Lennon (RIP)


"Don't get cute... Don't get funny now... It's later than you think..."
~ Greg Kihn


"As we celebrate mediocrity... all the boys upstairs wanna see...
How much you'll pay... for what you used to get for free..."

~ Tom Petty


Image

"I think you'd better ask yourself... before you criticize me...
Are you a victim of the System... or the Powers-That-Be?
If there was nothing to gain... would you do it for free?"

~ Sammy Hagar


"I was glad to come... I'll be sad to go... So while I'm here... I'll have me a real good time..."
~ Rod Stewart (The Faces)


"The earth can shake... The sky come down... The mountains all... fall to the ground...
But I will fear... none of these things... Shelter me, Lord... underneath your wings..."

~ Buddy Miller


"Rock hard... Ride free... All your life..."
~ Rob Halford


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Sun Apr 19, 2009 9:00 am 
Heavy Metal Cyber-Sleuth
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Joined: Sun May 07, 2006 8:34 am
Posts: 40784
Location: Uranus
Favorite Band: The Electric Mayhem
Facebook: sucks royal ass!
Speaking of solar systems, have a moon.

:moon2:

_________________
Milk, milk, lemonade,
round the back fudge is made.


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Mon Apr 20, 2009 11:27 pm 
The Lord of Destruction
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Joined: Mon May 08, 2006 11:51 pm
Posts: 31626
Location: South of Heaven
Favorite Band: Pinkmaiden Rainsabbath Zeppepriest
bildo wrote:
Speaking of solar systems, have a moon.

:moon2:


Redeemed. :wink:

Hey, when you are in the john, do you sing Moonchild? :lol:


:BB Steve

_________________
"I told you... that we could fly... 'Cause we all have wings... but some of us don't know why..."
~ Michael Hutchens (RIP)


"Life is what happens to you while you're busy making other plans..."
~ John Lennon (RIP)


"Don't get cute... Don't get funny now... It's later than you think..."
~ Greg Kihn


"As we celebrate mediocrity... all the boys upstairs wanna see...
How much you'll pay... for what you used to get for free..."

~ Tom Petty


Image

"I think you'd better ask yourself... before you criticize me...
Are you a victim of the System... or the Powers-That-Be?
If there was nothing to gain... would you do it for free?"

~ Sammy Hagar


"I was glad to come... I'll be sad to go... So while I'm here... I'll have me a real good time..."
~ Rod Stewart (The Faces)


"The earth can shake... The sky come down... The mountains all... fall to the ground...
But I will fear... none of these things... Shelter me, Lord... underneath your wings..."

~ Buddy Miller


"Rock hard... Ride free... All your life..."
~ Rob Halford


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Tue Apr 21, 2009 9:10 am 
Heavy Metal Cyber-Sleuth
User avatar
Joined: Sun May 07, 2006 8:34 am
Posts: 40784
Location: Uranus
Favorite Band: The Electric Mayhem
Facebook: sucks royal ass!
RockHard wrote:
bildo wrote:
Speaking of solar systems, have a moon.

:moon2:


Redeemed. :wink:

Hey, when you are in the john, do you sing Moonchild? :lol:


:BB Steve


No. I sing "Only The Lonely." :lol:

_________________
Milk, milk, lemonade,
round the back fudge is made.


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Tue Apr 21, 2009 4:20 pm 
Heavy Metal Honey
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Joined: Sat Feb 02, 2008 1:00 am
Posts: 5698
Location: sf bay area
Favorite Band: THIS is ur plan for catching spambots?
bildo wrote:
RockHard wrote:
bildo wrote:
Speaking of solar systems, have a moon.

:moon2:


Redeemed. :wink:

Hey, when you are in the john, do you sing Moonchild? :lol:


:BB Steve


No. I sing "Only The Lonely." :lol:


I don't know why I respond to this type of stuff but once it gets in my head it must go somewhere. :roll:

Bildo, trying to hit those high notes Orbison hits should be helpful with your squatting issues.


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Tue Apr 21, 2009 4:42 pm 
Heavy Metal Cyber-Sleuth
User avatar
Joined: Sun May 07, 2006 8:34 am
Posts: 40784
Location: Uranus
Favorite Band: The Electric Mayhem
Facebook: sucks royal ass!
fruitless endeavor wrote:
bildo wrote:
RockHard wrote:
bildo wrote:
Speaking of solar systems, have a moon.

:moon2:


Redeemed. :wink:

Hey, when you are in the john, do you sing Moonchild? :lol:


:BB Steve


No. I sing "Only The Lonely." :lol:


I don't know why I respond to this type of stuff but once it gets in my head it must go somewhere. :roll:

Bildo, trying to hit those high notes Orbison hits should be helpful with your squatting issues.


If it's a particularly big one, I sing 'Crying.' :lol:


God, I'm sick. :?

_________________
Milk, milk, lemonade,
round the back fudge is made.


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Tue Apr 21, 2009 4:58 pm 
Heavy Metal Honey
User avatar
Joined: Sat Feb 02, 2008 1:00 am
Posts: 5698
Location: sf bay area
Favorite Band: THIS is ur plan for catching spambots?
Im never clicking on this thread again.


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 Post subject: Re: The Search for the Solar System's Lost Planet
PostPosted: Tue Apr 21, 2009 9:11 pm 
The Lord of Destruction
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Joined: Mon May 08, 2006 11:51 pm
Posts: 31626
Location: South of Heaven
Favorite Band: Pinkmaiden Rainsabbath Zeppepriest
bildo wrote:
fruitless endeavor wrote:
bildo wrote:
RockHard wrote:
bildo wrote:
Speaking of solar systems, have a moon.

:moon2:


Redeemed. :wink:

Hey, when you are in the john, do you sing Moonchild? :lol:


:BB Steve


No. I sing "Only The Lonely." :lol:


I don't know why I respond to this type of stuff but once it gets in my head it must go somewhere. :roll:

Bildo, trying to hit those high notes Orbison hits should be helpful with your squatting issues.


If it's a particularly big one, I sing 'Crying.' :lol:


God, I'm sick. :?


:lmao:


:BB Steve

_________________
"I told you... that we could fly... 'Cause we all have wings... but some of us don't know why..."
~ Michael Hutchens (RIP)


"Life is what happens to you while you're busy making other plans..."
~ John Lennon (RIP)


"Don't get cute... Don't get funny now... It's later than you think..."
~ Greg Kihn


"As we celebrate mediocrity... all the boys upstairs wanna see...
How much you'll pay... for what you used to get for free..."

~ Tom Petty


Image

"I think you'd better ask yourself... before you criticize me...
Are you a victim of the System... or the Powers-That-Be?
If there was nothing to gain... would you do it for free?"

~ Sammy Hagar


"I was glad to come... I'll be sad to go... So while I'm here... I'll have me a real good time..."
~ Rod Stewart (The Faces)


"The earth can shake... The sky come down... The mountains all... fall to the ground...
But I will fear... none of these things... Shelter me, Lord... underneath your wings..."

~ Buddy Miller


"Rock hard... Ride free... All your life..."
~ Rob Halford


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