What is the age of Earth: solar day, lunar day, or astronomical day?

[asmalik12]

Hi,

Age of Earth is equal to

1. A solar day
2. A lunar day
3. An astronomical day
4. None of these

Which is the correct one and how?

 

[phinds]

Do you have any idea how old the Earth is?

 

[asmalik12]

According to my book:

1.4 x 10⁷ s

 

[phinds]

and do you have any idea how long each of those other things is?

 

[asmalik12]

It's approximate value. nope, I don't have any idea about this.

That's why I asked it here !

 

[phinds]

perhaps you would find it informative to look them up.

 

[SammyS]

According to my book:

1.4 x 10⁷ s

I suggest getting a different book.

The age of the Earth is on the order of 4.5✕10⁹ years .