I know that stars can age. That they grow into red giants, or become supernovas. They they have a lifespan.

I know this information, the evidence seems reasonable. It's all very logical.

But at a deeper level something in me resists this being true. Stars seem eternal, the sun seems eternal. I wonder if I can ever really let this idea sink in?

I think if it did? My skin would go cold.

Is this something that you feel like you really *know* ?