Imagine that we are able to drift effortlessly throughout the vast universe. Our travels unveil many wonders. Bright stars dazzle us with their brilliance and smaller clusters sit like jewels upon a cloak of soft black velvet. Splashes of translucent colour occasionally present themselves and everywhere around us is beauty and majesty upon an infinite scale. But this universe of ours, in all its scale and majesty, is not a static picture. There is life, death and rebirth in a cycle of wondrous activity stretched across dimensions of time and space which we may never fully comprehend. As we drift silently through this graceful vista, we pass through a galaxy where there is an inexorable tension building. A mass of swirling, hot gases have been caught in the vice-like grip of gravitational force, contracting them ever inwards upon themselves, increasing heat and tension again and again. The mighty gravitational force is unstoppable, the heat sears in intensity and the tension increases until the sphere of gases can no longer bear the burden of existence in their present form. As the temperature soars beyond 10 million degrees K, suddenly there is a blinding flash of light as our gaseous sphere, by now compressed into a highly massive entity, explodes defiantly into a nuclear fusion of hydrogen and helium, producing enough thermal energy to push back upon the suffocating force of gravity. A miracle of nature has occurred and a beautiful new-born star has been delivered into the universe.