Skip to main content


Where Your Elements Came From

Image Credit & License: Wikipedia: Cmglee; Data: Jennifer Johnson (OSU)

https://apod.nasa.gov/apod/ap230108.html #APOD
#APOD
in reply to (moving) APOD

Tc, Po, At, Rn, Fr, Ra, Pm, Ac, Pa & Np are generally produced synthetically in a nuclear reaction
in reply to (moving) APOD

Another aspect of the universe that holds endless fascination for me. I always wanted a wall hanging of this, but was put off by the interior decor police.
in reply to (moving) APOD

aren't many of them produced by more than one process?
in reply to (moving) APOD

Finally... I have seen this image so many times... glad it's getting the recognition it deserves
in reply to (moving) APOD

My first thought was: how do elements created from merging neutron stars escape? I know they're insanely dense with gravity some 2 billion times stronger than the Earth.

So I googled it and discovered that material is still ejected in an event called a "kilonova". So named because its peak brightness is about 1000 times that of a typical nova.

It's impossible to imagine the energy involved in events like that.

#elements #nova #gravity #kilonova #neutronstars #periodictable
in reply to (moving) APOD

i guess:
Carl Sagan 👉 we all are made of stardust

i think this is even more exciting than any religious myth of creation
in reply to (moving) APOD

@sellathechemist While we’ve got the astronomers looking at this we should remind them that not everything after helium is a metal 🤣
in reply to (moving) APOD

What about the "gray elements". Why are they not accounted for?
in reply to (moving) APOD

For anyone in or going to Copenhagen, the Tycho Brahe Planetarium does a wonderful job of visualizing the connections between the elements in our bodies and cosmological events in their Cosmos interactive exhibit: https://en.planetarium.dk/exhibitions/ #planetariumcph
in reply to (moving) APOD

@minkorrekt davon hattet ihr es doch kürzlich am Beispiel Gold .. vielleicht mögt ihr das nochmals beleuchten 🙂
in reply to (moving) APOD

This always blows my mind. Earth is very element-rich. This table means at least one star system went through its entire birth-life-death cycle before our solar system even formed. And our solar system is pretty frickin’ old. Amazing.
in reply to (moving) APOD

This is cool, but it should cover more trans-uranic elements, and colour them in another hue for those only observed when humans have created them in reactors.
in reply to (moving) APOD

What's interesting / ironic is that helium on Earth is almost all ... of neutron-star origin.

That is, it's formed within the Earth's crust and core through decay of radioactive elements --- heavy stuff such as uranium, thorium, and plutonium naturally occurring. These give off beta particles --- a pair of protons and neutrons, which capture electrons and emerge as helium gas, a/k/a helium-4. Most of what humans capture is trapped in natural gas deposits and is recovered as part of the processing of gas wells.

So we get the second-most-abundant element in the Universe which is normally created from the Big Bang directly or stellar fusion through the long round-trip of neutron-star collisions and geological processes.
in reply to (moving) APOD

.@APoD One minor punch up would be a metric for elements that are the result of decay of other elements. IE Radon is present from uranium decay.

Lo, thar be cookies on this site to keep track of your login. By clicking 'okay', you are CONSENTING to this.