The universe has been expanding ever since the Big Bang.
Astronomers just confirmed the existence of “Dark Energy”, a mysterious repulsive force that acts in opposite to gravity. As the distance increases, the attractive gravitational force decreases but this mysterious repulsive force increases. This repulsive force is pushing galaxies apart; the greater the distance the greater the repulsion. Scientists today do not know what this “Dark Energy” is, but they know that it is causing the entire universe to expand at an increasing rate.
[Quran 51.47] And the heaven, We built it with craftsmanship and We are still expanding.
(The Bible says that the sky is “hard as a mirror of cast bronze” Job 37:18. So the Bible insists on a static universe. Actually Albert Einstein’s famous blunder, the cosmological constant, was to explain the static universe. Although at that time no scientific evidence existed to support that claim, Einstein gave the Bible the benefit of the doubt and went for a static universe, non-expanding non-contracting. Later, when Edwin Hubble discovered the expansion of the universe, Einstein retracted this cosmological constant and called it the biggest blunder of his career. By trusting the Bible Einstein got it wrong by the order of 10120).