I heard from a friend that he heard this thing on the news claiming that planet Mars is now rotating the opposite way now (so now the sun rises from the west instead). This shocked me pretty seriously so I am here to check on the validity of this piece of news.
Thanks from one of the teeming millions.
It’s not the rotation of Mars that has reversed. It’s the apparent direction of Mars as it moves acros the sky. It’s called retrograde motion, and it’s an illusion caused by the Earth having a higher angular velocity.
Venus rotates on its axis in the opposite direction of us. But, all the planets revolve around (orbit) the Sun in the same direction.
Our position relative to them and the Sun causes some odd APPARENT movements at times.
Mars did reverse its course across the sky, if that is what your friend heard;
this happens every two years, and is called a ‘retrograde loop’.
http://www.spaceweather.com/delights/mars2003_Loop.html
However it is just an illusion; the planet does not really reverse its course, it just seems to as the Earth sppeds by in its faster orbit.
And the spin of Mars itself is unaffected.
SF worldbuilding at
http://www.orionsarm.com/main.html
Thanks for the replies… What I meant is not the direction across the sky, but rather its orbit around its own axis. So no such phenomena took place, I deduce?
No.
A planet ROTATES (spins) on its axis.
It REVOLVES (orbits) around the Sun.
If a planet stopped rotating and then reversed direction, I believe it would rip itself to shreds. And what force could cause that to happen in the first place?!
Like this? ;j