Using spectroscopy we can determine much about a planet's atmosphere.
Mercury
The two most prevalent elements on Jovian or gas planets like Jupiter and Saturn are hydrogen and helium. These elements make up the bulk of their composition, with hydrogen being the most abundant element in their atmospheres.
the outer planets are gaseous and the inner planets are not
Mercury, Venus, Mars, and the gas giants Jupiter, Saturn, Uranus, and Neptune do not have oxygen in their atmospheres. These planets have atmospheres composed of different elements and compounds, but oxygen is not a significant component.
Planets near the sun likely lost lighter elements like hydrogen and helium due to the sun's high temperature and solar wind. These elements were blown away, leaving behind the heavier elements that make up the terrestrial planets closer to the sun.
They look like that because they are all at different distances and have different elements in their atmospheres. Mars looks red because we see the rocky red surface, while on the other planets (except Mercury) we only see the top of a very thick layer of clouds.
Planets are made up of many different particles. Such as iron, rock, metal, lighter rock elements.
Light Spectrum Analysis. Different elements reflect different wavelengths of light. Simply put if you look at th different colors of light that is reflected from something you can determine the basic elements it is composed of.
The heavier elements gathered at the centre of the gravity well of the solar system, near the sun; this includes elements like iron, silicon and nickel, and their various compounds with oxygen and carbon. However, much of the lighter elements - carbon, oxygen, nitrogen - are flung out to the extremes by displacement and by centrifugal force. Thus, the closer planets consist mainly of the heavier elements while the outer planets are mostly 'gases', because they were primarily the elements available and near enough to accrete at those points.
Mercury
By, Looking at the rocks and its different patterns to see where the stars or planets are located and you can probably use its different patterns as a compass.
The symbols of the elements named after planets are: Lead (Pb) named after the planet Saturn Mercury (Hg) named after the planet Mercury Platinum (Pt) named after the dwarf planet Pluto Uranium (U) named after the planet Uranus Other elements also have symbols that may resemble planet symbols, but these are specifically named after planets.
Hydrogen and helium are the primary elements on those planets.
Because the planets are closer to us so when we look at the planets we can see them move so the closer an object is to you the easier it is to follow its motion. Hope you could use my answer
its not different at all they are just outer planets
Mars and Earth are very different planets when it comes to temperature, size, and atmosphere, but geologic processes on the two planets are surprisingly similar. On Mars, we see volcanoes, canyons, and impact basins much like the ones we see on Earth.
Heavy elements.