How do you form Mercury, Venus, Earth AND Mars? The answer may surprise you! (or not ¯\_(ツ)_/¯)
Planet 9. Everyone’s favorite yet to be discovered planet; famously predicted to exist due to the aligned orbits of TNOs. Today’s paper explores the question, is a Planet 9 really the most likely scenario to explain these orbits?
We see that many stars have a buddy star or two i.e. they are a binary or multi-star system. This paper addresses the question: How in the heck does that happen?
Today’s astrobite explores a newly detected triple AGN system.
*just to be clear, the aliens I am talking about are rocks and not alive nor intelligent. But there may be many of them!