The inner planets, Mercury, Venus, Earth, and Mars, are mostly rock and iron. The outer planets, Jupiter, Saturn, Uranus, and Neptune, are much larger and are mostly hydrogen, helium, and ice.
How does the universe differ from what? We only know of the one, so it's hard to imagine what we could compare it to.
If you mean how do these things differ from each other... pretty much completely.
A planet is a celestial body that isn't a star, is large enough to have its own weight pull it into hydrostatic equilibrium (you can basically think of this as "being round"), and has "cleared its orbit", which is a little complicated but basically means that it's the biggest thing anywhere near its own orbit by a large margin (some exceptions could be made for "double planets", where two similarly-sized objects share the same orbit and also orbit each other).
A solar system consists of at least one star and at least one other object, which could be another star or a planet or even just gravitationally bound debris (like asteroids or comets).
The universe is everything. Which is why we only know of the one, there's only one set of "everything". It's possible to quibble about this and talk about parallel universes or alternate universes which are separate from ours in some way, but we don't know of any and probably can't know of any.
The distance between planets are measured in millions of kilometers while the distance between solar systems are measured in light years while the galxies and the universe are measured in AU (astronautical units)
Planets that are not part of our solar system and in other solace systems are called exo-solar planets or exoplanets.
We do not know. Although we have detected planets in other solar systems, we do not know what colors they are.
the rest of the universe and other solar systems
They are in all three. Planets are in solar systems. There are lots of solar systems in a galaxy. There are lots of galaxies in the universe. So any planet is in a solar system, a galaxy and the universe.
Solar System is our Sun and the eight planets (Plus all the other stuff that revolves around our Sun). The Universe is everything - I mean everything. Trillions of stars, billions of galaxies and more than likely trillions of other solar systems.
There are eight planets, including Earth, in our solar system, there are many solar systems in our galaxy, and there are countless galaxies in the universe.
The distance between planets are measured in millions of kilometers while the distance between solar systems are measured in light years while the galxies and the universe are measured in AU (astronautical units)
Most planets orbit stars forming stellar systems. Stars are not part of the solar system which is simply the stellar system for our star - otherwise known as the sun. Stellar systems together form galaxies and these form a part of the universe.
Maybe because if it's not, all the planets or many of the planets/solar systems/parts/the universe will be in jumble/disarray
Yes. There are many other solar systems in the universe. In fact thereis the probability for some 200 billion solar systems inour ownMilky Way galaxy alone, because our sun is one of 200 billion stars in the Milky Way.
Planets that are not part of our solar system and in other solace systems are called exo-solar planets or exoplanets.
http://exoplanet.eu/ There are 263 known solar systems (stars with planets) to date (December 2008), though more are found each month. It is likely that a substantial fraction of the 200 billion stars in our galaxy are orbited by planets. That's just our galaxy--there are about 100 billion galaxies in the universe. You do the math.
solar systems