4 ms·

I've always heard that if you see a star, you're seeing the light from a star that is long dead. Could not the light completely reach us and fade away? What ma

I've always heard that if you see a star, you're seeing the light from a star that is long dead. Could not the light completely reach us and fade away? What makes a star permanent?

thombat 3y ago
Certainly not true for almost all stars visible to the naked eye. Consider Alpha Centauri, well known to all southern hemisphere inhabitants and just four light years away.