1. Scientists think they have found the speed at witch the universe is expanding.

  2.This is important for estimating the age ,science and the future os the universe .

  3.70 years ago,Hubble provided evidence that the universe is not peaceful and unchanging but developing.

  4.He said that galaxies in space were moving away from each other at speeds which increase with distance.

  5.The earlier estimates differ widely:Some say the universe is 10,000million years old .others say it could be as much as 20,000million years old .

  6.27 scientists used the hubble space telescope to observe 18 galaxies as far as 65 million light years from earth,they discovered 800 very bright stars in those galaxies and used them to compare several other methods of measuring distances in space,they say that the universe has been expanding for at least 12,000 million years.

  7.But depending on other measurements ,the universe could be as much as 1,500 million years older depending on other measurements,some experts say the findings support the idea that the expasion of the universe is speeding up and will continue ,and this means that the universe will not slow down and break up,but Allan Sandage's group say that the universe is closer to 15,000million years old ,or possibly even older.