'Because
the planets travel round the Sun in different orbits, the inner
planet periodically gets the inner turn and overtakes an outer
planet.
This is the cause of the planets apparent backwards or retrograde
motion in the Sky' |
|
Average per
year |
Stationary |
Retrograde
motion |
Mercury |
6
times |
72 days |
Venus |
< 2 |
25 days |
Mars |
< 2 |
27.5
days |
Jupiter |
2 |
103
days |
Saturn |
2 |
106
days |
Uranus |
2 |
151
days |
Neptune |
2 |
160
days |
Pluto |
2 |
162
days |
|
'Mercuy
was stationary and went retrograde on Friday 16. October 1987.
This coincided with beginning of one of the most dramatic
drops and crashes to financial markets in history' |
|