abstract:The galactic year, also known as a cosmic year, is the duration of time required for the Solar System to orbit once around the center of the Milky Way Galaxy.Cosmic Year, Fact Guru, University of Ottawa Estimates of the length of one orbit range from 225 to 250 million "terrestrial" years.
In typical outsize Branson fashion, the 61-year-old rappelled from the ceiling of the hangar now called the "Virgin Galactic Gateway to Space" and, while dangling in midair, chugged from a bottle of champagne in front of a large crowd to celebrate.