One of the oldest observatories in South America is the Quito Astronomical Observatory. In settings near astronomical telescopes and observatories, low pressure sodium lamps may be used. Furthermore, linked to it were also astronomical observatories and other major experimental endeavors. They used their constructions as astronomical observatories and places of ritual celebration. Mauna Kea is the site of some of the world's most important ground-based astronomical observatories. Changes that predate magnetic observatories are recorded in archaeological and geological materials. TRW built many spacecraft, including Pioneer 1, Pioneer 10, and several space-based observatories. This was accomplished by using the satellite in conjunction with ground-based observatories and interferometry techniques. Besides LIGO, many other gravitational-wave observatories (detectors) are under construction. Menzies claimed that the tower closely matches designs used in Chinese observatories and lighthouses elsewhere. There has been substantial opposition to the Mauna Kea observatories that continues to grow. Zij star catalogues were produced at these observatories. CGRO was the second of NASA's four Great Observatories. It is ranked fourth on the list of old observatories by NASA. In 1979, NASA named the third of its four "Great Observatories" after Chandrasekhar.