At least 4,600,000,000 years. You'll need a lot of candles if you want to make it a birthday cake.
How the solar system made
The number of solar systems in a galaxy can vary greatly, but on average, there are billions of solar systems in a galaxy. The total number of solar systems within a galaxy is determined by factors such as the size of the galaxy, the amount of gas and dust available for star formation, and the rate of star formation within the galaxy.
Age of our solar system (~4.6bya)
The approximate age of the solar system based on the oldest rocks that have been analyzed is 4.56 billion years.
That's the age of our Solar System, so you can expect all the planets in our Solar System to have approximately that age.
The Solar System is about 4.6 billion years old.
It's your solar system too. Well we can use maths to work out how long it would take certain things in our and other solar systems to form, and by using models and simulations coupled with the laws of physics.
They tell us the age of the moon, which indicates when the Solar System itself was being formed.
That's the age of our Solar System, so you can expect all the planets in our Solar System to have approximately that age.
The Earth is part of the Solar System, so they are of the same age.
They don't. Do some reading on the Solar System (for example, in Wikipedia); the current estimate for the age of the Solar System is between 4-5 billion years.They don't. Do some reading on the Solar System (for example, in Wikipedia); the current estimate for the age of the Solar System is between 4-5 billion years.They don't. Do some reading on the Solar System (for example, in Wikipedia); the current estimate for the age of the Solar System is between 4-5 billion years.They don't. Do some reading on the Solar System (for example, in Wikipedia); the current estimate for the age of the Solar System is between 4-5 billion years.
About 4.6 billion years.