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Alpha Centauri has a planet



 
 
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  #1  
Old November 16th 09, 03:57 AM posted to sci.astro
granite stone
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Posts: 5
Default Alpha Centauri has a planet

I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. If all stars are suns, you could say each star has planet
pulling on each sun's mantle.

Google Tidal Forces Io and lots come up from NASA.

Jon Riley
Toronto
  #2  
Old November 16th 09, 07:00 AM posted to sci.astro
Yousuf Khan[_2_]
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Posts: 1,692
Default Alpha Centauri has a planet

granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. If all stars are suns, you could say each star has planet
pulling on each sun's mantle.

Google Tidal Forces Io and lots come up from NASA.


Uh, where do I start?

First the Moon and Earth's mantle. What you're talking about is tidal
heating. Typically tidal heating is more pronounced when a larger body
tugs on a smaller body, with a big size ratio between them. Your example
of the tidal forces on Saturn's moon, Io, is an example of that. Saturn
pulls on Io's crust and mantle and heats it up, but Io's tidal forces on
Saturn are puny by comparison. Similarly the Moon's tidal forces on
Earth are puny, and don't cause much heating in its mantle or anywhere
else. Earth's tidal forces on the Moon are much more substantial, but
still not substantial enough to create volcanism on the Moon. Most of
Earth's heating comes internally from its own nuclear fission core.
Earth's iron core is suffused with large quantities of uranium.

The Sun doesn't have a mantle. A mantle is a layer within a solid planet
between the crust and the core of that planet. What one might call a
mantle for the Sun would be its convection layer. The Sun doesn't have a
crust or a mantle, but it does have a core. The core of the Sun is where
nuclear fusion takes place, just like the core of the Earth is where
nuclear fission takes place. The nuclear fuel at the core is the main
source of heat for stars and planets.

Yousuf Khan
  #3  
Old November 16th 09, 07:20 AM posted to sci.astro
BradGuth
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Posts: 21,544
Default Alpha Centauri has a planet

On Nov 15, 7:57*pm, granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. *In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. *Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. *If all stars are suns, you could say each star has planet
pulling on each sun's mantle.

Google Tidal Forces Io and lots come up from NASA.

Jon Riley
Toronto


Our moon contributes 2e20 N/sec, at least some of which causes tidal
heating.

~ BG
  #4  
Old November 16th 09, 07:23 AM posted to sci.astro
BradGuth
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Posts: 21,544
Default Alpha Centauri has a planet

On Nov 15, 11:00*pm, Yousuf Khan wrote:
granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. *In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. *Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. *If all stars are suns, you could say each star has planet
pulling on each sun's mantle.


Google Tidal Forces Io and lots come up from NASA.


Uh, where do I start?

First the Moon and Earth's mantle. What you're talking about is tidal
heating. Typically tidal heating is more pronounced when a larger body
tugs on a smaller body, with a big size ratio between them.


Our moon contributes 2e20 N/sec. (that's only 55.5e12 KW)

Your example
of the tidal forces on Saturn's moon, Io, is an example of that. Saturn
pulls on Io's crust and mantle and heats it up, but Io's tidal forces on
Saturn are puny by comparison. Similarly the Moon's tidal forces on
Earth are puny, and don't cause much heating in its mantle or anywhere
else. Earth's tidal forces on the Moon are much more substantial, but
still not substantial enough to create volcanism on the Moon. Most of
Earth's heating comes internally from its own nuclear fission core.
Earth's iron core is suffused with large quantities of uranium.


Make that include thorium.


The Sun doesn't have a mantle. A mantle is a layer within a solid planet
between the crust and the core of that planet. What one might call a
mantle for the Sun would be its convection layer. The Sun doesn't have a
crust or a mantle, but it does have a core. The core of the Sun is where
nuclear fusion takes place, just like the core of the Earth is where
nuclear fission takes place. The nuclear fuel at the core is the main
source of heat for stars and planets.

* * * * Yousuf Khan


  #5  
Old November 16th 09, 01:27 PM posted to sci.astro
Greg Neill[_6_]
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Posts: 605
Default Alpha Centauri has a planet

Yousuf Khan wrote:
granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. If all stars are suns, you could say each star has planet
pulling on each sun's mantle.

Google Tidal Forces Io and lots come up from NASA.


Uh, where do I start?

First the Moon and Earth's mantle. What you're talking about is tidal
heating. Typically tidal heating is more pronounced when a larger body
tugs on a smaller body, with a big size ratio between them. Your example
of the tidal forces on Saturn's moon, Io, is an example of that. Saturn
pulls on Io's crust and mantle and heats it up, but Io's tidal forces on
Saturn are puny by comparison. Similarly the Moon's tidal forces on
Earth are puny, and don't cause much heating in its mantle or anywhere
else. Earth's tidal forces on the Moon are much more substantial, but
still not substantial enough to create volcanism on the Moon. Most of
Earth's heating comes internally from its own nuclear fission core.
Earth's iron core is suffused with large quantities of uranium.


Since the Moon is tidally locked to the Earth (one side always
faces the Earth), there's not much in the way of tidal heating
going on, as there is little flexure apart from the small amount
due to libration.

The Earth's core itself is unlikely to contain much in the way of
uranium or potassium, they being locked up in siderophobic
compounds distributed thoughout the rest of the bulk of the planet.


The Sun doesn't have a mantle. A mantle is a layer within a solid planet
between the crust and the core of that planet. What one might call a
mantle for the Sun would be its convection layer. The Sun doesn't have a
crust or a mantle, but it does have a core. The core of the Sun is where
nuclear fusion takes place, just like the core of the Earth is where
nuclear fission takes place. The nuclear fuel at the core is the main
source of heat for stars and planets.


Consider also that the total mechanical energy available from the
orbits of all the planets is about 6 x 10^35 Joules. That's what
you could extract if every planet's orbit were to decay due to
tidal friction in the Sun and end up falling in. The Sun produces
about 1.2 x 10^34 Joules/year of energy, so using up all of the
planet's energies would power the Sun for less than 50 years.


  #6  
Old November 17th 09, 05:41 PM posted to sci.astro
granite stone
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Posts: 5
Default Alpha Centauri has a planet

On Nov 16, 1:00 am, Yousuf Khan wrote:
granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. If all stars are suns, you could say each star has planet
pulling on each sun's mantle.


Google Tidal Forces Io and lots come up from NASA.


Uh, where do I start?

First the Moon and Earth's mantle. What you're talking about is tidal
heating. Typically tidal heating is more pronounced when a larger body
tugs on a smaller body, with a big size ratio between them. Your example
of the tidal forces on Saturn's moon, Io, is an example of that. Saturn
pulls on Io's crust and mantle and heats it up, but Io's tidal forces on
Saturn are puny by comparison. Similarly the Moon's tidal forces on
Earth are puny, and don't cause much heating in its mantle or anywhere
else. Earth's tidal forces on the Moon are much more substantial, but
still not substantial enough to create volcanism on the Moon. Most of
Earth's heating comes internally from its own nuclear fission core.
Earth's iron core is suffused with large quantities of uranium.

The Sun doesn't have a mantle. A mantle is a layer within a solid planet
between the crust and the core of that planet. What one might call a
mantle for the Sun would be its convection layer. The Sun doesn't have a
crust or a mantle, but it does have a core. The core of the Sun is where
nuclear fusion takes place, just like the core of the Earth is where
nuclear fission takes place. The nuclear fuel at the core is the main
source of heat for stars and planets.

Yousuf Khan


The reason volcanism is not on the moon is that the moon does not
rotate with reference to earth. And it would have to rotate at a high
speed too.
  #7  
Old November 17th 09, 07:40 PM posted to sci.astro
Anders Eklöf
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Posts: 100
Default Alpha Centauri has a planet

Yousuf Khan wrote:

granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. If all stars are suns, you could say each star has planet
pulling on each sun's mantle.

Google Tidal Forces Io and lots come up from NASA.


You fail to notice, that the energy from tidal heating can be anything
from considerable (like Jupiter's effect on Io), over negligible (Moon's
effect on Earth) to ridiculous (*any* other body's effect on our Sun).

Uh, where do I start?

First the Moon and Earth's mantle. What you're talking about is tidal
heating. Typically tidal heating is more pronounced when a larger body
tugs on a smaller body, with a big size ratio between them. Your example
of the tidal forces on Saturn's moon, Io, is an example of that. Saturn
pulls on Io's crust and mantle and heats it up, but Io's tidal forces on
Saturn are puny by comparison. Similarly the Moon's tidal forces on
Earth are puny, and don't cause much heating in its mantle or anywhere
else. Earth's tidal forces on the Moon are much more substantial, but
still not substantial enough to create volcanism on the Moon. Most of
Earth's heating comes internally from its own nuclear fission core.
Earth's iron core is suffused with large quantities of uranium.


No - it's not fission. Uranium - as well as thorium and potassium
generate heat through radioactive decay, which is not the same as
fission. Fission is one kind of radioactive decay, but it's very rare in
nature, including Earth's core - unless you count alpha decay as
fission. Also, U, Th and K are not only present in the core, but
throughout the planet, though the heavier elements may be more
concentrated in the core.

The Sun doesn't have a mantle. A mantle is a layer within a solid planet
between the crust and the core of that planet. What one might call a
mantle for the Sun would be its convection layer. The Sun doesn't have a
crust or a mantle, but it does have a core. The core of the Sun is where
nuclear fusion takes place, just like the core of the Earth is where
nuclear fission takes place. The nuclear fuel at the core is the main
source of heat for stars and planets.

Yousuf Khan


As I said there fisson is negligible - the fraction is much less than
0.1% of the radioactive decay energy. And the decay takes place
throughout the planet.
There has been one known occurance of natural fission, not in the core,
but in ore deposits in Gabon, around 2 billion years ago. Google
"fission reactor Oklo" to read more about this.
Probably the radition disaster in Tjeljabinsk, Russia was also a result
of a spontaneous fission reaction, though hardly natural, as it took
place in a nuclear waste deposit.

--
I recommend Macs to my friends, and Windows machines
to those whom I don't mind billing by the hour
  #8  
Old November 17th 09, 09:03 PM posted to sci.astro
Androcles[_23_]
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Posts: 94
Default Alpha Centauri has a planet


""Anders Eklöf"" wrote in message
...
Yousuf Khan wrote:

granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. If all stars are suns, you could say each star has planet
pulling on each sun's mantle.

Google Tidal Forces Io and lots come up from NASA.


You fail to notice, that the energy from tidal heating can be anything
from considerable (like Jupiter's effect on Io), over negligible (Moon's
effect on Earth) to ridiculous (*any* other body's effect on our Sun).



You fail to notice that the energy from tidal heating can be anything
from considerable (like Jupiter's effect on Io), to VERY
CONSIDERABLE (Moon's effect on Earth, causing vulcanism
and earthquakes). Just because the water moves doesn't mean the
crust does not. This is EXACTLY the same process as Jupiter's
effect on Io.




  #10  
Old November 18th 09, 06:46 AM posted to sci.astro
BradGuth
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Posts: 21,544
Default Alpha Centauri has a planet

On Nov 17, 1:03*pm, "Androcles" wrote:
""Anders Eklöf"" wrote in message

...



Yousuf Khan wrote:


granite stone wrote:
I read an article that the moon's force on the mantle might give us
magma and magma is not chemical. *In the same way some of the larger
planets may have a pull on our sun's mantle giving us solar
radiation. *Since the sun spins every 6 days the spin travels through
the pull on the sun's mantle, energy, huge amounts of it, is given
off. *If all stars are suns, you could say each star has planet
pulling on each sun's mantle.


Google Tidal Forces Io and lots come up from NASA.


You fail to notice, that the energy from tidal heating can be anything
from considerable (like Jupiter's effect on Io), over negligible (Moon's
effect on Earth) to ridiculous (*any* other body's effect on our Sun).


You fail to notice that the energy from tidal heating can be anything
from considerable (like Jupiter's effect on Io), to VERY
CONSIDERABLE (Moon's effect on Earth, causing vulcanism
and earthquakes). Just because the water moves doesn't mean the
crust does not. This is EXACTLY the same process as Jupiter's
effect on Io.


That's 100% correct.

Our Selene/moon is by far the most considerable influence upon its
planet Earth, than any other planet/moon ratio. 2e20 N/sec of
interactive tidal force has been directly heating Earth to its core
for quite some time (at least for the past 12,600 some odd years).

~ BG
 




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