The giant space rock dubbed Comet 21P/Giacobini-Zinner has been becoming increasingly easier to spot at night since around mid-August. Emitting a characteristic green-blueish glow, Comet 21P has ...

Miguel Claro is a professional photographer, author and science communicator based in Lisbon, Portugal, who creates spectacular images of the night sky. As a European Southern Observatory photo ...

Focus your telescopes on the night skies this September and you just might spot Comet 21P Giacobini–Zinner on its journey around the Sun. The unusual green comet was spotted rushing through deep space ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The comet known as 21P/Giacobini-Zinner (21P for short) is currently ...