First, in case you haven't heard: 70,000 Years Ago, Another Star Flew by the Edge of the Solar System | RealClearScience. According to an international team of astronomers, about 70,000 years ago a red dwarf star -- nicknamed "Scholz’s star" for the astronomer who discovered it -- passed by our solar system just 0.8 light years … Continue reading A close pass by a red dwarf star, and a note on interplanetary and interstellar distances
I have to say that I had no idea this was still being debated: Voyager spacecraft might not have reached interstellar space. In 2012, the Voyager mission team announced that the Voyager 1 spacecraft had passed into interstellar space, traveling further from Earth than any other manmade object. But, in the nearly two years since that … Continue reading Voyager spacecraft might not have reached interstellar space
xkcd: Oort Cloud. Comet ISON survived its swing by the sun, at least somewhat.