by : Astrophysics in the Glorious Quran
Time is Relative - Age of Universe:
Moslems believe that Paradise and Hell are both much bigger and much more massive than Earth (but still much smaller than God's Throne). The theory of general relativity says that time passes slower near an object more massive than Earth (clocks run slower in stronger gravitational fields). So according to general relativity, time should pass in Paradise/Hell much slower than on Earth. Moslems say that this is what Allah says. It is stated in the Quran that 1 day in Paradise/Hell measures a 1000 years on Earth:
[Quran 22.47] They challenge you to bring forth that torture [in Hell] and Allah will not break His promise; a day of your Lord [Paradise/Hell promise] is like a thousand years of what you count.
Here God promises those who do not believe in Hell and punishment that each day of their torture in Hell will measure a thousand years on Earth. So according to the Quran, time passes faster on Earth than in Paradise/Hell. But this agrees with the theory of general relativity which says that time passes slower near bigger mass. Paradise and Hell are much more massive than Earth and time should pass there much slower than on Earth.
Christians believe that God created the universe in 6 earthly days and rested on the 7th. Moslems believe that 6 days passed at God's Throne but we experienced 13.7 billion years on Earth: Moslems believe that God is not bound to His Throne; rather He created it and set it as a reference. The Quran says that God's Throne is even wider than the whole universe; so how about the mass of God's Throne? God's Throne is much more massive than Earth. Time should pass there much slower than on Earth:
Our solar system is 4.567 billion years old. Earth started accreting concurrently with the sun and our neighbouring planets 4.56 bln years ago. However the universe is 13.7 ± 0.2 bln years old. This places the age of Earth at one third the age of the universe (4.567 bln/13.7 bln = 1/3). Moslems say that this is what Allah says. The Quran says that in God's Throne time Earth is 2 days old while the Heavens, Earth and everything in between are 6 days old (2/6 = 1/3):
[Quran 50.38] We [Allah] created the heavens and the Earth and all what's between them in six days, and We were not touched by fatigue.
[Quran 41.9] Say: "Is it that you deny Him [Allah] who created the Earth in two days? And you claim others to be equal to Him? He is the Lord of (all) the Worlds."
When God says that He created the Heavens, the Earth and EVERYTHING IN BETWEEN (including you and me) in six days this means that He is referring to the period of existence. Earth has been in existence for 2 days (out of 6).
In God's Throne time, Earth is 2 days old while the Heavens, Earth and everything in between are 6 days old. This makes the age of Earth to be one third the age of the universe (2/6 = 1/3). Similarly in Earth time, the age of Earth is 4.567 billion years while the age of the universe is 13.7 billion years; this is also one third (4.567 bln/13.7 bln = 1/3). So it is the same ratio in Earth time or in God's Throne time. The theory of general relativity explains why time at God's Throne passes slower than on Earth. General relativity explains why 6 days passed at God's Throne but we measured it as 13.7 billion years (that is each day at God's Throne measures around 2.28 billion years on Earth). So according to the Quran:
God's Throne > Paradise/Hell > Earth
The smaller the mass, the faster the time.
We are sure that time is relative, that is, the age of the universe is different for observers with clocks running at different rates. For example, there exists an observer who measures the age of the universe to be 3 billion years, however he also measures the age of Earth to be 1 billion years. But the Quran presented it as a ratio (1/3) and this ratio turned out to be correct for any observer (whatever the clock rate). If the Quran presented it in any other form other than a ratio it would have been wrong for different observers.
(The Christian Bible puts the creation of Earth on day one; making the age of Earth equal to the age of the universe)