@vicgrinberg As a professional chemist and amateur astronomer, I have always loved this version of the periodic table. I love the idea that only about 2% of the initial big-bang hydrogen has been converted into anything else, and to hold a piece of iron-nickel meteorite, and think:
a) it is the oldest thing I will ever touch
b) the generations of stars that lived and died to produce it!

#astronomy #chemistry #periodictable