Greater Density The size and composition of the planets is caused by the density of the elements that make up the planets. The elements in the Inner Planets are more closely packed together, causing them to be smaller and solid.
Smaller Density Despite being larger, the elements that make up the Outer Planets are less densely packed together causing them to be quite light for their size.
Varied atmospheres The contents of the atmospheres of the Inner Planets varies from planet to planet. Mercury has no atmosphere although Sodium and Helium can be detected above the surface. Venus' atmosphere is mostly Carbon Dioxide with a very small amount of Nitrogen. Earth's atmosphere is mostly Nitrogen with a smaller amount of Oxygen and even smaller amounts of other gases. Mars has a similar composition of carbon dioxide and nitrogen as Venus although has a much thinner atmosphere.
Similar atmospheres The atmospheres of the Outer Planets consist mostly of Hydrogen and Helium, with Methane also being present in the atmospheres of Uranus and Neptune. Other gases are present although in much smaller quantities. Known by the ancients The existence of the Inner Planets has been known about for thousands of years. The temperature of the early solar system explains why the inner planets are rocky and the outer ones are gaseous.
As the gases coalesced to form a protosun, the temperature in the solar system rose. What is Saturn made of? Saturn is not solid like Earth, but is instead a giant gas planet. Hydrogen and helium are what most stars are made of. It is thought that there might be a molten, rocky core about the size of Earth deep within Saturn. What are the inner planets made of? The inner planets Mercury, Venus, Earth, and Mars are relatively small rocky planets made up mostly of silicate minerals and iron and nickel metal.
Most of the earth is made up of only three elements: iron, silicon, and oxygen. Most of the iron is in the core of the earth. Which planet has the most rings? Earth has the most rings in our solar system. Before when Voyager 1 transmitted a single photograph of Jupiter's rings, Saturn was the only known planet with a ring system. Why are there two main types of planets? There are two types of planets in our solar system: rocky and gaseous.
The inner and outer planets are separated by the asteroid belt, which is a region of space where thousands of asteroids can be found. Now lets see similarities between Inner and Outer Planets.
The inner planets and outer planets are characterized by different features. The 4 inner planets are called terrestrial planets because they have a solid surface and are similar to Earth. These planets are composed of heavy metal, such as iron and nickel and have few or no moons. Mercury, the smallest planet, has no moons and is comprised mostly of iron and nickel.
It is one of the densest planets in the Solar System. Venus, known for its brightness, has a rocky surface similar to the Moon, which is hidden by its thick yellow atmosphere. Like Mercury, Venus has no moon. It rotates slowly 59 Earth days relative to the time it takes to rotate around the sun 88 days.
The planet has no moons, but has a tenuous atmosphere exosphere containing oxygen, sodium, hydrogen, helium and potassium. Venus: Venus was once considered a twin planet to Earth, until astronomers discovered its surface is at a lead-melting temperature of degrees Fahrenheit degrees Celsius. The planet is also a slow rotator, with a day long Venusian day and an orbit around the sun at days.
Its atmosphere is thick and contains carbon dioxide and nitrogen. Earth: Earth is the only planet with life as we know it, but astronomers have found some nearly Earth-sized planets outside of our solar system in what could be habitable regions of their respective stars. It contains an atmosphere of nitrogen and oxygen, and has one moon and no rings. Many spacecraft circle our planet to provide telecommunications, weather information and other services. Mars: Mars is a planet under intense study because it shows signs of liquid water flowing on its surface in the ancient past.
Today, however, its atmosphere is a wispy mix of carbon dioxide, nitrogen and argon.
0コメント