https://www.theregister.co.uk/2019/01/15/wonky_protoplanetary_disk/ > Astronomers have found the first example of a protoplanetary disk forming at a right angle to its parent stars, according to a paper published in Nature Astronomy this week. > The HD 98800 system, located about 150 light years away, has been known for while. For years, its most distinguishing feature to Earth-based boffins was its quadruple star system, consisting of two sets of twin stars that are separated by a distance 54 times of that between the Earth and the Sun.