Comets 252P/LINEAR (right) and 2016 BA14 as they flew past Earth on March 21 and March 22, 2016, respectively. (Photo Credit Slooh Community Observatory)

This past week was an exciting one for astronomy fans. That's because two comets — 252P and P/2016 BA14 — were scheduled to make their closest approach to Earth, back-to-back. The icy celestial bodies did not disappoint.