Everything you need to know about Planet X: The mysterious 9th planet - Interesting Engineering

Planet X has been given many names... Nibiru, Tycho, etc., but we'll just go with Planet 9.

Research has long suggested that stars like our Sun rarely occur individually. Usually, there are one or more sibling stars scattered nearby. The fact that the Sun doesn't have an established twin is… [+10174 chars]

full article...