PICTURE SHOWS: The planet Mercury is seen in silhouette, center, as it transits across the face of the Sun, behind the Washington Monument, Monday, Nov. 11, 2019, in Washington. Mercury???s last transit was in 2016. The next won???t happen again until 2032. Photo Credit: (NASA/Bill Ingalls) ... STORY COPY: NASA have taken the opportunity to highlight that they are not just about leaving the Earth???s atmosphere with a look back at 100 images documenting the 2019 work of the NASA Headquarters photo team. Here are some highlights of their pictorial choices. Where: Washington, District Of Columbia, United States When: 11 Nov 2019 Credit: NASA/Cover Images **Editorial use only**