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Short Answer:

The Sun, Moon and planets, including Earth and Mars, were formed at the same time. The entire solar system was formed about 4.5 years ago.

Even the rare Martian meteorites found on Earth have been dated to around 4.5 billion years old.

More Information:

Scientist have direct measurements that show there is material on Earth at least 4.4 billion years old. The oldest material found on Earth is in the form of small crystals of a material called zircon (zirconium silicate ZrSiO4) and in Australia these were measured to be 4.4 billion years old. They even suggest that water was present when they were formed.

Analysis of the isotope concentrations of lead in the oldest known samples of the mineral galena on Earth indicate that the lead is 4.5 to 4.6 billion years old.

The material on Earth was formed from a cloud of gas and dust that formed the entire Solar system. The age of Earth can not be older than everything else in the solar system. That is why many meteorites have been tested as well as material returned from the Moon missions.

Meteorites show a spread of ages between 4.53 and 4.58 billion years, so that is taken to mean the initial formation of the solar system covered a similar period of time.

Moon samples show dates with a maximum of around 4.4 and 4.5 billion years.

Even the rare Martian meteorites have been dated to around 4.5 billion years old.

The final check is the age of the Sun. That is harder, but some information is known by looking at all the stars of a similar character and comparing age with luminosity and mass. These studies put the age of the Sun in the same time frame of 4.5 billion years, but with less accuracy.

Conclusion:

From all data available, the Earth and Sun and planets all formed about 4.5 to 4.6 billion years ago.

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12y ago

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Related Questions

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