One synonym for astronomical observatories is "space observatories."
Satellite observatories such as NASA's Fermi Gamma-ray Space Telescope and the European Space Agency's INTEGRAL have been used to study the collision of neutron stars. These observatories detect the gamma-ray bursts and electromagnetic radiation produced during such collisions, providing valuable insights into the events.
I take that you are asking 'astronomical observatories'. 'Observatory' is a noun, observatories is the plural form. Astronomical is simple a modifier (adjective, in this case.)
Siegfried Marx has written: 'Sternwarten der Welt' -- subject(s): Astronomical observatories 'Observatories of the world' -- subject(s): Astronomical observatories
Alt-azimuth is the mount ussually found in professional observatories.
There are thousands of observatories in the world, ranging from small amateur setups to large professional facilities. The exact number can vary as new observatories are built and existing ones are decommissioned.
yes
observatories
mountains
Roger Hutchins has written: 'British university observatories, 1772-1939' -- subject(s): Astronomical observatories, History
stone like buildings an observatories
The were the first people to build observatories