Explaining on Instagram: "When you look up at the night sky, you are actually looking into the past 👀 Because light takes time to travel, many stars you see are thousands or even millions of years away. That means the light reaching your eyes left those stars long ago. Some of them may have already exploded or burned out, but their light is still traveling through space toward Earth. It is a humbling thought that the sky is a cosmic time machine, showing us what the universe looked like long be