In Honor of Stephen - 3/16/18

I didn't have to look too far in my search for a puzzle to honor the memory of Stephen Hawking, who passed away on Wednesday.  It has been noted that the date of Hawking's death coincided with Einstein's birthday (March 14), and that the date of his own birth (1/8/42) coincided with the 300th anniversary of Galileo's death. Today's cental New York puzzle was created back in 2011 to say:

Happy Birthday, Stephen

Tomorrow we'll ...