At this point of the very early universe, the universe is thought to have expanded by a factor of at least 10 in volume. This is equivalent to a linear increase of at least 10 times in every spatial dimension—equivalent to an object 1 nanometre (10 m, about half the width of a molecule of DNA) in length, expanding to one approximately 10.6 light-years (100 trillion kilometres) long in a tiny fraction of a second. This phase of the cosmic expansion history is known as inflation.