Lost Planets of the Universe

Lost Planets of the Universe

When we look at the planets in the solar system, a distinct order is noticeable. Mercury, Venus, Earth, and Mars, located in the inner part, are small, rocky planets. Jupiter, Uranus, Saturn, and Neptune, located in the outer part, are large and largely composed of gases. One explanation for this order is that the solar system is largely composed of volatile gases such as hydrogen and helium. The amount of elements such as iron, nickel, carbon, and silicon is much smaller. In regions closer to the Sun, where the temperature is higher, volatile gases such as hydrogen and helium move at high speeds. It is difficult for these volatile gases to combine and form the structure of the planets.

 Therefore, planets that have formed in regions close to the Sun are largely composed of heavier elements such as iron and nickel and have a rocky structure. The reason these planets are relatively small is, naturally, that heavy metals, which are found in their composition, are scarce in the solar system. In regions further from the Sun where the temperature is lower, hydrogen and helium move at lower speeds. It is easier for these volatile gases to combine and form the planets. Therefore, the planets in the outer regions of the solar system are largely composed of gases. These planets The reason they are much larger compared to the planets in the inner region of the solar system is, naturally, that hydrogen and helium, which are in their structure, are abundant in the solar system. Until about thirty years ago, the known planets were limited to those in the solar system.

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