The astrolabe was in use until the last half of the 17th century. The invention of the pendulum clock made clocks much more reliable, and more specialized and accurate scientific devices ...

The Foucault pendulum which was displayed for many years in the Smithsonian's National Museum of American History was removed in late 1998 to make room for the Star-Spangled Banner Preservation ...

And watching someone recreate the feat, such as by building an astrolabe by hand, can be very appealing too. The astrolabe is an ancient astronomical tool of incredible versatility, allowing the ...

The identification of an eleventh-century Islamic astrolabe bearing both Arabic and Hebrew inscriptions makes it one of the oldest examples ever discovered and one of only a handful known in the ...