Sources and further reading: https://sites.google.com/view/sources-stellar-engines Get your Stellar Engine Infographic Poster here: https://shop.kurzgesagt.org Nothing in the Universe is static. In the milky way, billions of stars orbit the galactic center. Some, like our sun, are pretty consistent, keeping a distance of around 30,000 light years from the galactic center, completing an orbit every 230 million years.