Ryugu samples reveal traces of rock from before the Sun existed

Small bits of material in the asteroid contain isotopes made in specific stars.

https://arstechnica.com/science/2023/08/ryugu-samples-reveal-traces-of-rock-from-before-the-sun-existed/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social