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Moon's mass



 
 
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  #1  
Old March 4th 12, 11:01 PM posted to uk.sci.astronomy
OG
external usenet poster
 
Posts: 780
Default Moon's mass

On 05/03/2012 16:53, Szczepan Bialek wrote:
"Abdul napisal w wiadomosci
...
On Feb 3, 8:55 am, "Szczepan wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".

I have also read that in Newton's time the mass was almost the twice
more.

Who and when calculated the new value?

S*



The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu

http://rimg.geoscienceworld.org/content/60/1/221


" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the groundwork for
the Apollo program and provided a basic understanding of the surface, its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*


A quick search of Google Books shows that it was known to be of that
order of magnitute at least 150 years ago
http://books.google.co.uk/books?id=1...20MOON&f=false

  #2  
Old March 5th 12, 09:31 AM posted to uk.sci.astronomy
Abdul Ahad
external usenet poster
 
Posts: 15
Default Moon's mass

On Feb 3, 8:55 am, "Szczepan Bialek" wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than Earth's".

I have also read that in Newton's time the mass was almost the twice more.

Who and when calculated the new value?

S*



The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu

http://rimg.geoscienceworld.org/content/60/1/221

Abdul Ahad
The two questions: "Is there an afterlife?" and "Why is the universe
silent?"are both opposite sides of the same coin.
  #3  
Old March 5th 12, 05:53 PM posted to uk.sci.astronomy
Szczepan Bialek
external usenet poster
 
Posts: 51
Default Moon's mass


"Abdul Ahad" napisal w wiadomosci
...
On Feb 3, 8:55 am, "Szczepan Bialek" wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".

I have also read that in Newton's time the mass was almost the twice
more.

Who and when calculated the new value?

S*



The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu

http://rimg.geoscienceworld.org/content/60/1/221


" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the groundwork for
the Apollo program and provided a basic understanding of the surface, its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*



  #4  
Old March 5th 12, 08:42 PM posted to uk.sci.astronomy
Abdul Ahad
external usenet poster
 
Posts: 15
Default Moon's mass

On Mar 5, 4:53*pm, "Szczepan Bialek" wrote:
*"Abdul Ahad" napisal w ...





On Feb 3, 8:55 am, "Szczepan Bialek" wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".


I have also read that in Newton's time the mass was almost the twice
more.


Who and when calculated the new value?


S*


The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu


http://rimg.geoscienceworld.org/content/60/1/221


" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the groundwork for
the Apollo program and provided a basic understanding of the surface, its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*



The IAU (1964) System of Astronomical Constants lists the Mass ratio :
Earth/Moon as 81.30. So, yes, this figure of 81.30 has been in use at
least since 1964. Before that, an old system of constants used in
planetary theory had the mass ratio as 81.45

  #5  
Old March 6th 12, 09:31 AM posted to uk.sci.astronomy
Szczepan Bialek
external usenet poster
 
Posts: 51
Default Moon's mass


"Abdul Ahad" napisal w wiadomosci
...
On Mar 5, 4:53 pm, "Szczepan Bialek" wrote:
"Abdul Ahad" napisal w
...





On Feb 3, 8:55 am, "Szczepan Bialek" wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".


I have also read that in Newton's time the mass was almost the twice
more.


Who and when calculated the new value?


S*


The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu


http://rimg.geoscienceworld.org/content/60/1/221


" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the groundwork
for
the Apollo program and provided a basic understanding of the surface, its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*



The IAU (1964) System of Astronomical Constants lists the Mass ratio :
Earth/Moon as 81.30. So, yes, this figure of 81.30 has been in use at
least since 1964.

Before the Apollo misions.

Before that, an old system of constants used in
planetary theory had the mass ratio as 81.45.

It seems to me that the Apollo missions data are still analised.
S*


  #6  
Old March 6th 12, 09:32 AM posted to uk.sci.astronomy
Szczepan Bialek
external usenet poster
 
Posts: 51
Default Moon's mass


Uzytkownik "OG" napisal w wiadomosci
...
On 05/03/2012 16:53, Szczepan Bialek wrote:
"Abdul napisal w wiadomosci
...
On Feb 3, 8:55 am, "Szczepan wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".

I have also read that in Newton's time the mass was almost the twice
more.

Who and when calculated the new value?

S*



The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu

http://rimg.geoscienceworld.org/content/60/1/221


" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the groundwork
for
the Apollo program and provided a basic understanding of the surface, its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*


A quick search of Google Books shows that it was known to be of that order
of magnitute at least 150 years ago
http://books.google.co.uk/books?id=1...20MOON&f=false


"Jarrold & sons, 1853"

So the " Missions of the 1960s" did not change it.
The same like with the "G" measured by Cavendish.
S*





  #7  
Old March 8th 12, 09:16 PM posted to uk.sci.astronomy
OG
external usenet poster
 
Posts: 780
Default Moon's mass

On 06/03/2012 08:32, Szczepan Bialek wrote:
Uzytkownik napisal w wiadomosci
...
On 05/03/2012 16:53, Szczepan Bialek wrote:
"Abdul napisal w wiadomosci
...
On Feb 3, 8:55 am, "Szczepan wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".

I have also read that in Newton's time the mass was almost the twice
more.

Who and when calculated the new value?

S*



The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu

http://rimg.geoscienceworld.org/content/60/1/221

" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the groundwork
for
the Apollo program and provided a basic understanding of the surface, its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*


A quick search of Google Books shows that it was known to be of that order
of magnitute at least 150 years ago
http://books.google.co.uk/books?id=1...20MOON&f=false


"Jarrold& sons, 1853"

So the " Missions of the 1960s" did not change it.
The same like with the "G" measured by Cavendish.
S*


I'm sure the space missions of the 60s would have allowed a
significantly more accurate calculation of the mass of the Moon.


  #8  
Old March 9th 12, 10:07 AM posted to uk.sci.astronomy
Szczepan Bialek
external usenet poster
 
Posts: 51
Default Moon's mass


"OG" napisal w wiadomosci
...
On 06/03/2012 08:32, Szczepan Bialek wrote:
Uzytkownik napisal w wiadomosci
...
On 05/03/2012 16:53, Szczepan Bialek wrote:
"Abdul napisal w wiadomosci
...
On Feb 3, 8:55 am, "Szczepan wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".

I have also read that in Newton's time the mass was almost the twice
more.

Who and when calculated the new value?

S*



The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu

http://rimg.geoscienceworld.org/content/60/1/221

" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the
groundwork
for
the Apollo program and provided a basic understanding of the surface,
its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*

A quick search of Google Books shows that it was known to be of that
order
of magnitute at least 150 years ago
http://books.google.co.uk/books?id=1...20MOON&f=false


"Jarrold& sons, 1853"

So the " Missions of the 1960s" did not change it.
The same like with the "G" measured by Cavendish.
S*


I'm sure the space missions of the 60s would have allowed a significantly
more accurate calculation of the mass of the Moon.


I am too.
But the mass of the Moon is not important.
The "G" (gravity constant) is very important. The "G" measured by Cavendish
is wrong because the balls had the excess of electrons.
The direct measurement on the Moon is free from that error.

But the result is still a secret.
S*


  #9  
Old March 11th 12, 06:50 PM posted to uk.sci.astronomy
OG
external usenet poster
 
Posts: 780
Default Moon's mass

On 09/03/2012 09:07, Szczepan Bialek wrote:
napisal w wiadomosci
...
On 06/03/2012 08:32, Szczepan Bialek wrote:
Uzytkownik napisal w wiadomosci
...
On 05/03/2012 16:53, Szczepan Bialek wrote:
"Abdul napisal w wiadomosci
...
On Feb 3, 8:55 am, "Szczepan wrote:
Everywhere is wrote: "The moon's mass is 81.3 times smaller than
Earth's".

I have also read that in Newton's time the mass was almost the twice
more.

Who and when calculated the new value?

S*



The Moon's mass expressed as a fraction of the Earth's, as you say, is
1/81.3. It is based upon parameters of the orbit of the Moon around
the Earth and also upon assumptions about the structure and
composition of the lunar interior. There's much more in the scientific
literatu

http://rimg.geoscienceworld.org/content/60/1/221

" Missions of the 1960s including the Rangers, Surveyors, and Lunar
Orbiters, as well as Earth-based telescopic studies, laid the
groundwork
for
the Apollo program and provided a basic understanding of the surface,
its
stratigraphy, and chronology."

Is the " 1/81.3 " calculated before 1960s or after?
S*

A quick search of Google Books shows that it was known to be of that
order
of magnitute at least 150 years ago
http://books.google.co.uk/books?id=1...20MOON&f=false

"Jarrold& sons, 1853"

So the " Missions of the 1960s" did not change it.
The same like with the "G" measured by Cavendish.
S*


I'm sure the space missions of the 60s would have allowed a significantly
more accurate calculation of the mass of the Moon.


I am too.
But the mass of the Moon is not important.
The "G" (gravity constant) is very important. The "G" measured by Cavendish
is wrong because the balls had the excess of electrons.
The direct measurement on the Moon is free from that error.

But the result is still a secret.
S*


In fact, Cavendish didn't measure G, as Newton's equation wasn't
expressed in that form until much later.
Cavendish's intention was to measure the density of the Earth. Using his
results it is possible to calculate a value for G.

I've no idea what you are talking about as regards to the error, but his
results are within 1% of the currently accepted value.
  #10  
Old March 11th 12, 07:07 PM posted to uk.sci.astronomy
Szczepan Bialek
external usenet poster
 
Posts: 51
Default Moon's mass


"OG" napisal w wiadomosci
...
On 09/03/2012 09:07, Szczepan Bialek wrote:

Is the " 1/81.3 " calculated before 1960s or after?
S*

A quick search of Google Books shows that it was known to be of that
order
of magnitute at least 150 years ago
http://books.google.co.uk/books?id=1...20MOON&f=false

"Jarrold& sons, 1853"

So the " Missions of the 1960s" did not change it.
The same like with the "G" measured by Cavendish.
S*


I'm sure the space missions of the 60s would have allowed a
significantly
more accurate calculation of the mass of the Moon.


I am too.
But the mass of the Moon is not important.
The "G" (gravity constant) is very important. The "G" measured by
Cavendish
is wrong because the balls had the excess of electrons.
The direct measurement on the Moon is free from that error.

But the result is still a secret.
S*


In fact, Cavendish didn't measure G, as Newton's equation wasn't expressed
in that form until much later.
Cavendish's intention was to measure the density of the Earth. Using his
results it is possible to calculate a value for G.

I've no idea what you are talking about as regards to the error, but his
results are within 1% of the currently accepted value.


The Earth has the excess of electrons. So the Cavendish balls were
electrically charged.
The effect is size dependent. The Moon dust levitate because the Moon has
also the excess of electrons.
What will be G if you use the Moon and the small particle?

To measure the G it should be used the very large balls. For example the
Moon and the astronaut.
Do you agree?
S*


 




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