|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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
|
|||
|
|||
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* |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Yes, REAL suspected Black Holes can RiP you APART.!! But NOT in GR gtr Tivity.!! Because in GR Tivity you would be a POiNT ..and if you COULD have a mass, in GR, you would be a POiNT-mass. POiNT-mass CANNOT *STRETCH* with TOP & BOTTOM ROCKETs attache | brian a m stuckless | Astronomy Misc | 0 | October 15th 05 12:22 PM |
Causation - A problem with negative mass. Negastive mass implies imaginary mass | brian a m stuckless | Astronomy Misc | 0 | October 1st 05 08:36 PM |
Moon's Center of Mass | Mark McIntyre | UK Astronomy | 18 | July 24th 03 10:28 PM |
Moon's Center of Mass | AndyK | UK Astronomy | 6 | July 23rd 03 06:31 PM |
Moon's center of mass | vvega | Misc | 3 | July 22nd 03 05:10 PM |