[Phys-L] stardust

[Anthony Lapinski <alapinski@pds.org>]

I tell my astronomy students every year that "there's a little stardust in
all of us." The reasons why. We're all part of the universe. etc. So I was
wondering the other day - just *what percent of our body is actually
stardust* (from supernova)? I figured it must be small -- "little
stardust." But realized there are many heavy elements in our body. And we
have to factor in the H and He from the Big Bang. Does anyone know how to
calculate an approximate (actual) percent of stardust?

I did a search and found this:

https://www.physicscentral.com/explore/poster-stardust.cfm#:~:text=The%20human%20body%20is%20about,in%20our%20body%20is%20stardust
.

which states in the end that 93% of our body mass is stardust. Wow! If so,
I'll have to rephrase what I tell my students!

-- 


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