We don’t understand how a freakishly heavy exoplanet could have formed

Neptune-sized planet has a density similar to pure silver.

https://arstechnica.com/science/2023/08/we-dont-understand-how-a-freakishly-heavy-exoplanet-could-have-formed/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social