The estimate for gold in the universe is 50B tons.
There's 550B tons of organic matter on earth - I'm assuming most of that being plant mass.
And that's if you're certain Earth is the only planet in the entire universe that has organic life.
50B tons seems like a suspiciously low number even just within our own galaxy.
That is a wild underestimate. Our galaxy alone has around 100 million Earths worth of gold [1].
[1] https://www.discovermagazine.com/the-sciences/astronomers-ta...
But I see there's an estimate that there's more gold than that just in our Sun.
> It is estimated that the amount of gold present in the entire universe is about 50 billion tons, with about one ounce for every 150 billion tons of Earth.
According to Alexander Budianto on quora[2] the earth is ~6.58310^21 tons ~ 710^21
710^21/(15010^9) / 10^9 = 46 billion
So that is ~46 billion ounces of gold on earth, rounded up 50 billion. Maybe that is where they obtained 50 billion from?
[1] https://www.zmescience.com/feature-post/natural-sciences/che...
[2] https://www.quora.com/How-much-is-the-mass-of-the-earth-in-t...
https://www.quantamagazine.org/did-neutron-stars-or-supernov...
...one supernova can produce 7.4e22 kg of gold (the moon's mass), while a neutron star to neutron star collision can produce 1.9e27 kg of gold (a Jupiter's mass worth). 50e9 tons is 4.6e13 kg.
This estimate is off by many orders of magnitude.
The issue of course is that most of that gold is at the center of the Earth, not accessible to us.
So that's not 50B tons per universe, but rather, per rocky Earth-type planet.
My layman understanding of Astrophysics is that we understand things up to Iron pretty well. Beyond that there is a lot of conjecture.
I've never heard it explained very well, the best I can find is a 40 year old PBS show. Thanks to Virginia Trimble.
That's the claim in the linked article.