Have any stars visible to human eyes already died?

When we look out across the Universe, we’re also peering back in time. <img alt="" src="https://miro.medium.com/v2/resize:fit:700/0*1H_5famrYIWz3F7W" style="height:700px; width:700px" /> In the early 21st-century, we’ve successfully mapped out practically all the stars in our neighborhood in three-dimensional space. The closest stars to us don’t always align with the stars we can see, as what’s visible is determined by a combination of distance and intrinsic brightness. (<a href="https://commons.wikimedia.org/wiki/File:3_Solar_Interstellar_Neighborhood_(ELitU).png" rel="noopener ugc nofollow" target="_blank">Credit</a>: Andrew Z. Colvin) <a href="https://medium.com/starts-with-a-bang/have-any-stars-visible-to-human-eyes-already-died-2a673da4ee84">Learn More</a>