Interstellar comet 3I/ATLAS is now barreling away from the sun, never to return to the solar system. There's one more chance ...
Alien-hunters are focusing their telescopes on 'pulsar' stars to time their twinkles, giving them a new tool to sift through ...
In the bigger picture, "down" could be defined as being below the plane of the solar system, which is known as the ecliptic.