This week, anticipation builds as astronomers await what the closest approach of the interstellar comet 3I/ATLAS might reveal.| The Debrief
The comet 2I/Borisov is the second interstellar object we've ever spotted entering the solar system from deep space. It could tell us more about how comets form or what it's like in other planetary systems.| www.abc.net.au
Astronomers have discovered a new object that originated outside of our Solar System — only the third to be found.| www.abc.net.au