Machado said:
The soil is rich in ferric oxides.
2.-couls jupiter be pulling earth towards it?
The orbits of the planets are fairly rigid. We've been sort of settled into these paths and that's where we'll most likely stay. Things
do happen, but we're talking on timescales of millions, or even billions of years.
That said, most of the planets in the solar system act on each other all the time (hell, the planets in our solar system cause a gravitational wobble in our very own Sun ... we've even used this effect to discover other planets orbiting other stars). They cause perturbations (wobbling, basically) in the orbits of the planets. In fact, these perturbations are what led to Neptune being discovered.
(warning: history lesson)
For a long time, the only planets that were known were the ones that had been knowing since ancient times. Mercury, Venus, Mars, Jupiter and Saturn. Early on, people didn't know
entirely what they were, but they knew that these bodies were different than the stars, because of their strange paths across the sky ("planet" is derived from the Greek word for "wanderer"). With the invention of the telescope, people began to really study these planets (and by this time, had a rough idea that they were similar to our own Earth), and began to accurately determine their orbits. They noticed that Saturn had this inexplicable wobble over a long period of time. The most they could do was chalk it up to instrument-related error.
In the spring of 1781, William Herschel, using some of his
excellent hand-crafted optics, noticed a fuzzy ball in his eyepiece. He changed magnifications and noted that it grew and shrunk in comparison to the stars around it (this happens because they're so distant). After further observation and comparisons with older observation logs led to the discovery of a new planet (the object had been seen and recorded, but had looked no different than any others star). This planet is what we now call (and joke about) ... Uranus.
Quickly, they realized that the gravitational effect of Uranus was causing the perturbations in the orbit of Saturn and everything began to make sense. But then, over years of observations, they noted that Uranus had a wobble! In Europe, two mathematicians independently realized that it would have to be another planet-sized object in order for it to cause those sizes of perturbations. They then set out (with no knowledge of what the other was doing) to determine where the object causing that wobble was. Amazingly, both mathematicians, Urbain Le Verrier and John Couch Adams, managed to accurately predict the location of the planet. Le Verrier was more proactive with his results and was initially credited with the discovery. The Royal Astronomical Society in England wanted to try and keep things quiet so they could make the discovery an English one. This led to a bunch of fighting, but eventually, both mathematicians and the German astronomer (Johann Galle) who used Le Verrier's coordinates were credited with the discovery of Neptune.
THEN, they found perturbations in the planet of Neptune! Unfortunately, these are caused by an area of frozen objects known as the Kuiper Belt. Interestingly enough, this did lead to the
purely accidental discovery of Pluto, but they realized that Pluto was much too small to be causing any sort of wobble in Neptune's orbit.
3.-why are all other moon called with a name while ours is just called moon?
The word "moon" is related to the Latin "mensis", which means month. The Moon has historically been a timekeeping device (many societies use a lunar calendar, as opposed to solar calendar), so that's how it got its name. As for why
ours is called that and others are "moons" with other names, that's a historical thing. Nobody knew that other things orbited other planets, so when they were first discovered, they had to call them something and I guess they went with what seemed natural.
Technically, the more scientific term is "natural satellite".