Polaris is our North star, but thousands of years ago it was Vega. Astrophotographer Miguel Claro took these photos to show what it's like now, and what it was like with Vega as our North star.
First, let's start with why our North star changes. The Earth's axis isn't perfect. It "wobbles" while the Earth rotates, and essentially changes every 26,000 years. The "wobble" is called axial precession, and it's mostly caused by the gravitational pull of both the Moon and Sun.