Astronomers have used the NASA/ESA Hubble Space Telescope to track the two components of Luhman 16AB, the third closest system to the Solar System. This series of dots with varying distances between them shows the slow dance of two members of the brown-dwarf binary system Luhman 16AB. The image is a stack of 12 images made over the course of three years with Hubble. Image credit: NASA / ESA / Hubble / L. Bedin et al. Luhman 16AB, also known as WISE...