Astronomers Discover a Giant New Dwarf Planet Candidate Hiding Beyond Pluto (sciencealert.com)

From Rubin Observatory - the discoverers (34 points) https://news.ycombinator.com/item?id=50266046

So, this is a final resolution to the Planet X mystery? The one which Batygin predicts?

A giant "dwarf" planet? So...just a regular-sized planet, then?