sundial

Cross the orbit of 6446 Lomberg, the asteroid named in honor of his contributions to science, and sail by Mars, where the Spirit, Opportunity and Curiosity rovers bear sundials he helped design.

He kept track of time through a sundial during the day and stars at night, though he says he was given a watch near the end of his detention.

The largest of the group by far, “Point of Infinity,” is also a sundial in a sense, though without hour markings.

The ancient Egyptians invented the first water clocks and sundials more than 3,500 years ago.

They riff on the ancient Greek advancements of the sundial, making natural light part of their deal, allowing ‌their surfaces to shift and dance as a viewer moves around them.