Astrophotographer Andrew McCarthy waited for several hours to capture Comet Leonard from his home in Arizona after it made its closest approach to Earth on December 12.
Comet Leonard getting brighter as expected, according to Quanzhi Ye, an astronomer at the University of Maryland in College Park, but he is not entirely certain why.
Comet Bernardinelli-Bernstein has been vaporizing carbon monoxide as it gets warmer during its approach of the sun, experts at University of Maryland report.