Dipole Moments of the Planets and the sun

In summary, the conversation discusses the source of the magnitude of dipole moments for all planets and the sun, with a specific focus on the average values. The units for planetary magnetic dipole moments are also mentioned, along with a table of the current values for each planet. The conversation also mentions the fluctuation of these values due to solar activity and planetary topography. A link to NASA's website is provided, but it is noted that some planets are missing from their data. The conversation ends with the mention of a comparison between Ceres, Earth, and the Moon and a reference for further information.
  • #1
Philosophaie
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I am wondering if there is a source of the magniude of the Dipole moments of all the planets and the sun, m.

m(earth) is 8*10^22 A*m^2.

The Magnetic Field and the Electric Field such that:

Br = Mu0/4/pi*2*m*cos(Theta)/r^3
Btheta = Mu0/4/pi*m*sin(Theta)/r^3
Mphi = 0
Er = 1/4/pi/Epsilon*2*m*cos(Theta)/r^3
Etheta = 1/4/pi/Epsilon*m*sin(Theta)/r^3
Ephi = 0

I know that they actually fluctuate due to changing solar activities,ie solar flares and planetary topograpy but I want the average magnitudes just the same. Does anyone have this data or website?
 
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  • #2
Found this link on the Nasa website. Anybody know why Sun, Venus and Mars are missing?

http://lepmfi.gsfc.nasa.gov/mfi/lepedu/planets.htm [Broken]
 
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  • #3
planetary magnetic dipole moments...



The Systeme International (S.I.) units for planetary magnetic dipole moments is:
[tex]\mu = \frac{\text{N} \cdot \text{m}}{\text{T}}[/tex]
Newton-meters per Tesla.

All the currently available planetary magnetic dipole moments are available at creationwiki.org.

Planetary magnetic dipole moments (at present):
0 3.5 * 10^29 N-m/T Sol
1 3.8 * 10^19 N-m/T Mercury
2 8.0 * 10^17 N-m/T Venus
3 7.98 * 10^22 N-m/T Earth
4 2.1 * 10^18 N-m/T Mars
5 N/A Ceres
6 1.55 * 10^27 N-m/T Jupiter
7 4.6 * 10^25 N-m/T Saturn
8 3.0 * 10^24 N-m/T Uranus
9 1.5 * 10^24 N-m/T Neptune
10 N/A Pluto

In Terra units:
0 4385965
1 4.761905E-04
2 1.002506E-05
3 1
4 2.631579E-05
5 N/A
6 19423.56
7 576.4411
8 37.59398
9 18.79699
10 N/A

Interesting to note that the planetary magnetic moments decay with time.

Lunar: 1.3 * 10^15 N-m/T

Reference:
Sun - Creationwiki
Solar System - scale image - Wikipedia
Solar system moons - scale image - Creationwiki
Ceres-Earth-Moon comparison - Wikipedia
Table of the planets - NASA
 
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1. What is a dipole moment?

A dipole moment is a measure of the separation of positive and negative charges within a system. In the case of planets and the sun, it refers to the distribution of electric charge within their respective magnetic fields.

2. How are dipole moments measured?

Dipole moments can be measured by observing the strength and direction of a magnetic field. This can be done using instruments such as magnetometers or by analyzing data from spacecraft flybys.

3. What do dipole moments tell us about planets and the sun?

The dipole moments of planets and the sun provide insight into their internal structure and magnetic fields. They can also help us understand the interactions between these bodies and their surrounding space environment.

4. How do the dipole moments of the planets and the sun compare?

The dipole moments of the planets and the sun vary greatly. For example, the sun has a much larger dipole moment than any of the planets, while the gas giants like Jupiter and Saturn have stronger dipole moments than the smaller rocky planets like Earth and Mars.

5. Can dipole moments change over time?

Yes, dipole moments can change over time due to a variety of factors such as changes in the internal structure of a planet or shifts in its magnetic field. The sun's dipole moment, for example, has been found to vary on an 11-year cycle due to changes in its magnetic activity.

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