I was reading about the hypothectical companion star "Nemesis" and I came across an article in which Spanish astronomers claimed to have found it. Then I seen another article that said what they were looking at was a known young supernova. I believe the name of the star/nova was G1.9 Does anyone know if this is a confirmed dwarf star in our outer solar system? And is it a generally accepted theory that our sun has a smaller companion star? If not then what do we think is causing Sednas orbit to be so long and distant?