<h3>Ages of planets and others in our Solar System and the Milky Way:</h3>
Planet Earth:
Earth is billion years old
Other Planets:
Venus is 4.503 billion years old
Mars is 4.603 billion years old
Neptune us 4.503 billion years old
Saturn is 4.503 billion years old
Uranus us 4.503 billion years old
Mercury is 4.503 billion years old
Jupiter is 4.503 billion years old
other:
Milky Way is 13.51 billion years old
Solar System is 4.571 billion years old
Moon is 4.53 billion years old
Sun is 4.603 billion years old
Pluto (dwarf planet) is 4.46-4.6 billion years old
Asteroid Belt is about 4.6 billions years old