According to our understanding so far, we thought that Uranus once was struck by a large object from space and that this collision caused its strange rotation. However, Uranus’ inner (regular) moons are all moving in the planet’s equator plan.

If Uranus really was struck, then how would it be possible for Uranus’ (inner) moons to have followed suit? According to this theory, the inner moons orbit around Uranus’ equator plan because they are being affected by the space wind which is tied to Uranus – the strongest in the equator plan – which is why the inner moons follow the equator plan. Also the cause of the circulation of the rings of the gasplanets, is due to the space wind.

 
 

Moon Name

Moon Diameter (km)

Inclination(°)
(to equator)

Semi major
axis (km)

Eccentricity

Cordelia

40,2

0,147°

49 752

0,00047

Ophelia

42,8

0,093°

53 764

0,0101

Bianca

51,4

0,162°

59 165

0,00088

Cressida

79,6

0,038°

61 767

0,00023

Desdemona

64,0

0,164°

62 659

0,00023

Juliet

93,6

0,056°

64 358

0,00059

Portia

135

0,087°

66 097

0,0001

Rosalind

72,0

0,285°

69 927

0,00009

S/2003 U 2

12,0

0°

74 800

0

Belinda

80,6

0,031°

75 255

0,00011

S/1986U 10

80,0

0°

76 416

0

Puck

162

0,318°

86 004

0,00005

S/2003 U 1

16,0

0°

97 734

0

Miranda

466

4,232°

129 872

0,0013

Ariel

1155

0,26°

190 900

0,012

Umbriel

1169

0,205°

266 000

0,0039

Titania

1578

0,34°

436 300

0,0077

Oberon

1523

0,058

583 519

0,0014

S/2001 U 3

12,0

135,14°

4 276 000

0,1459

Caliban R

98,0

120,28°

7 231 000

0,1588

Stephano

20,0

123,26°

8 004 000

0,2295

Trinculo

10,0

147,83°

8 578 000

0,2079

Sycorax R

190

146,84°

12 179 000

0,5224

S/2003 U 3

11,0

76,26°

14 345 000

0,6608

Prospero

30,0

164,04°

16 243 000

0,4431

Setebos

30,0

140,11°

17 501 000

0,5843

S/2001 U 2

12,0

151,7°

20 901 000

0,3682
 

As you can tell from the above schedule, Uranus’ 9 outer moons are irregular, i.e. they are not following the planet’s equator plan (as the 16 inner moons) – 2 of the irregular moons are retrograde. 

Many scientists are confused when it comes to the cause for the many retrograde moons in our solar system. The thesis is: (as is often the case) It is coincidental.

Jupiter, Saturn, Uranus and Neptune all have many irregular moons, including many retrograde moons.

The very large eccentricity of the outer moons is not strange and is (in most cases) not due to the so-called captured moons but are natural orbits. They arise because the space winds of the Sun and the mother planet accelerate the outer moons even more than what is caused by the acceleration due to gravity.

All moons are affected both by the space wind (SW) from the Sun as well as from the planets.

 

The SW from the Sun (red trajectory) will force the moon orbiting around the Sun.

The SW from the Earth (blue trajectory) will force the the moon orbiting around the Earth.

 

The Moon will be affected of the SW from the Sun, and slowly forced away from its naturally orbit.

 

But the Sun can't wind this battle. The Blue errors illustrate the SW of the planets.

The rotation of the planet, will force the moon back to its orbit around the planet.

 

Hence the moons orbit will begin rotate around the equator,

whereby the moons in the end will end up retrograde.

 

Exactly the same way planets become retrograde.

The space wind from the galaxy rotation disturbs the orbits of the planets.

 

The SW from the Sun will also force the Moon into deep elliptical orbit.

Read more in the next chapter "The Pioneer Anomaly"

See the calculations here