A bevy of comets, a "blood moon" total lunar eclipse and impressive northern lights were just three of the skywatching highlights in 2025. Here's how they unfolded.
In November 2025, the interstellar comet 3I/ATLAS emerged from behind the Sun and began making its way towards the outer Solar System. This was a momentous occasion, as the comet was experiencing increased activity following its closest approach to the Sun and was once again visible to our telescopes and robotic space missions. One such mission is the European Space Agency's (ESA) JUpiter Icy Moon Explorer (JUICE), which captured the above image of 3I/ATLAS using its Navigation Camera (NavCam).

