The direction, distance and motion of the comet through the sky during its closest approach could have made it seem like it was hovering over Bethlehem when Jesus was said to have been born.

Interstellar object 3I/ATLAS has grown a colossal, sunward anti-tail larger than the distance to the moon. Is this an unprecedented comet, or is Harvard's Avi Loeb right about a technological origin?

Astronomers detect "wobbling high-latitude jet" in comet 3I/ATLAS, according to a preprint paper. A new mutation of flu strain A (H3N2) is driving an increase in influenza cases and hospitalizations. Bears in central Italy are evolving to become smaller and less aggressive after interacting with humans, study finds.

Interloper 3I/ATLAS makes a color shift as it leaves the sun.

Comet 3I/ATLAS, an interstellar visitor, reaches its closest approach to Earth on Dec 19 at about 167 million miles - visible only with a strong telescope. Newsround speaks to an astrophysicist to find out all about it.

Interstellar comet 3I/ATLAS has once again baffled scientists and astronomers with its increasing brightness and striking green hue as it nears Earth. Comet 3I/ATLAS will reach its closest point to Earth on December 19 and astronomers expect it to shine even more at that time.