Recently, the National Aeronautics and Space Administration’s (NASA) Hubble Space Telescope has confirmed that the huge Bernardinelli-Bernstein comet is indeed the largest icy comet nucleus ever seen by astronomers.
The nucleus is called the C/2014 UN271 which has an estimated diameter of almost 129 kilometers.
The nucleus is around 50 times larger than that of most known comets, and its mass is estimated to be around 500 trillion tonnes.
The comet was discovered by astronomers Pedro Bernardinelli and Gary Bernstein in archival images from the Dark Energy Survey at an astronomical observatory in Chile.
It was discovered in November 2010 and has been intensively studied since.