The Most Precious Metals Are Created in Outer Space

The core of our planet is mainly made up of metals such as iron. From there, it spreads to Earth's crust, mixes with magma, comes into contact with oxygen, and combines with other elements. But how did they get into the core? One theory suggests that powerful supernova explosions far from our Universe formed a lot of metals from the periodic table. But does it mean there are some rare and expensive metals in space?