(NASA/JPL-Caltech) ================================================================================= Life isn't always easy for astrophysicists: just when they've figured out another aspect of the patterns of movement in our Solar System, along come two of the moons of Neptune to mess everything up. The two moons in question are Naiad and Thalassa, both around 100 kilometres or 62 miles wide, which race around their planet in what NASA researchers are calling a "dance of avoidance". Their strange orbit was first detected by NASA researchers in November 2019. Compared with Thalassa, Naiad's orbit is tilted by about five degrees – it spends half of its time above Thalassa...