If eternity future is possible.. why not eternity past?..
You are describing God.
DeJa Vu all over again
What about eternity now?
Like when you are waiting for the microwave oven to 'ding'.
Or during a really passionate kiss?
I'll tell you why. Because if the universe were eternally old (infinite past) it would already have to have burned out and gone through the cold dark death. We wouldn't be here.
Sauron
Or eternity present?
There are no "actual infinites". Look at this. Today is the last day of all days. But tomorrow will be the last day of all days. Therefore infiite past has changed from infinite days to infinite days + one more day. Ergo there cannot be an infinite past. This is Kalams argument of the cosmological argument for a beginning of the universe (very simplified form). The general theory of relativity asserts that time, space, matter, and energy had a beginning. This was confirmed and supported by Wilson and Penzias in finding the bacground ratiation from the beginnning of the universe, as well as COBE, WMAP, the Red Shift, the second thermal law.