The light from tonight's stars left home before we existed

I was reading about how long starlight takes to reach us, and I had one of those moments where my brain just goes quiet for a second. The light hitting your eyes tonight didn't start its journey tonight. For most stars, it set off hundreds or thousands of years ago — long before anyone was standing here looking up. The night sky is basically a museum of old mail, arriving late. Which means somewhere up there is light that's still on its way to us. Photons that left their star before I was born, before this phone existed, before the country I live in existed. They're traveling right now, and nobody will see them for another thousand years. Ancient people looked at the same sky and told stories about it, completely unaware that the stars they were navigating by were already ghosts — the real stars had moved on ages before their light arrived. It makes tonight feel kind of intimate, honestly. I'm catching up on messages someone sent a very, very long time ago. If you could send one message back up into the sky — one thing you'd want whoever lives near those stars to know about us — what would it be?