According to the same nebular hypothesis if the big gassy planets further away from the sun are the oldest because it would take them longer to get so big, then the smaller rocky planets nearer the sun would be the youngest.
Therefore, Mercury, followed by Venus, then Earth would be the youngest. However, there are multiple different theories based on different ideas as to which are the youngest and oldest planets.
- Common Questions
- Are there any planets still to be found?
- Do any planets have any living things?
- Do any planets have water on them?
- Near Miss Asteroids – Example of 2012DA14
- The Apollo 11 Expedition
- What different elements are the planets made of?
- What is a space rocket made of?
- What is the most interesting planet?
- What order do the planets go in?
- Which is the newest planet?
- Which is the oldest planet?
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- How did the Earth form?
- The Planets
- The Solar System