Guillermo haro which became the letter "O" in google doodle.

Location of Guillermo Haro Observatory. HTTPS://en.m.wikipedia.org/wiki/Guillermo_Haro_Observatory Google's page today, Wednesday (21/3/2018) is adorned by the appearance of the night sky with a constellation that forms the face of a man with glasses and a mustache. His face is right in the third letter or the letter "O" on the words "Google".

Who is he? He is Gillermo Haro, who today celebrates his 105th birthday. Haro is an astronomer born in Mexico in 1913 and grew up in Mexico's revolution.