Apr 13, 2022
Largest comet ever seen has a heart 'blacker than coal,' and it's headed this way
Astronomers have measured the icy heart of one of the largest comets ever discovered — a gargantuan, 4 billion-year-old rock that's currently barreling toward Earth at 22,000 mph (35,000 km/h). Don't worry: The enormous, icy rock — named C/2014 UN271, or Bernardinelli-Bernstein (BB) after its discoverers — is on course...