The web content discusses the age and movement of constellations, specifically focusing on the Orion constellation. It mentions that constellations are the patterns that stars form in the night sky, and that stars within a constellation can be gravitationally bound together or simply passing through. The author highlights that the stars in Orion are part of a stellar association and are relatively young, with some stars being millions of years old. They also mention that Betelgeuse, a star in Orion, will go supernova within the next 100,000 years. The content explains that constellations change on a timescale of tens or hundreds of thousands of years, while continents change on a much slower scale. The author concludes by discussing the movement of stars in spiral galaxies and how collisions can change the galaxy’s shape from spiral to elliptical.
https://www.lesswrong.com/posts/YMakfmwZsoLdXAZhb/constellations-are-younger-than-continents