Yes, six planets will be visible in the January night sky. And yes, they'll be in a line. But because planets always appear in a line from our Earth-bound vantage, the alignment isn't anything out ...

However, using the gravitational pull of a well-placed planet, such as Jupiter, to slingshot a spacecraft outwards can reduce the travel time dramatically, something no spacecraft has done better ...

(Imagine scattering marbles on your kitchen table; no matter where they are on the table, they will all look lined up if you look eye level with the table.) “Planets always appear along a line i ...