Stars cook up nearly all of the approximately 60 atomic elements in people’s bodies. But exactly how that works remains a mystery. Astrophysicists have developed cutting-edge computer simulations to grapple with an array of related puzzles:
• What were stars like when they first appeared in the universe over 13 billion years ago, starting the process of modern element production?
• What do we know about the nature of the death of massive stars — signaled by Type II supernovae — that fashion crucial elements such as calcium and oxygen?
• How might the burned-out stars called white dwarfs be brought to ruin by other stars in so-called Type Ia supernovae, inciting the fiery alchemy that yielded much of the iron in our blood and the potassium in our brains?
Scientists are still trying to figure out what triggers an individual Type Ia supernova and to determine the identity of the partner star to the exploding white dwarf. The Hubble Space Telescope’s recent discovery of the earliest known Type Ia supernova from more than 10 billion years ago, plus other results, favor a scenario in which two white dwarfs merge.
The results indicate that crucial elements in people formed later in the history of the universe than many had expected, says David Jones, the lead astronomer on the Hubble study. “It took (very roughly) about 750 million years longer to form the first 50 percent of the iron in the modern universe.”
Early Fireball Star
Join our list
Subscribe to our mailing list and get interesting stuff and updates to your email inbox.
More from Amazing Places
The World Wide Web is all abuzz with Google Earth images of Antarctica that appear to show pyramids in the …
Stonehenge is an emblematic monument for people from all over the world. Built about 5,000 years ago, it represents the mysteries and …
During the summer of 1950, physicist Enrico Fermi posed a question to his colleagues over lunch, "Don't you ever wonder …