Arecibo Obervatory

The World's Largest Single Aperture Telescope!

General Information

-The Arecibo Telescope is located in Arecibo, Puerto Rico.


- Used in 3 Major areas of research, Radio Astronomy, Eronomy, and Radar Astronomy.

- The Telescope is a spherical reflector which bounces radio waves.

- One single dish. (1,000 ft in diameter, and 790,000 square feet.)

Pictures of The Arecibo Obervatory

Major Discoveries

- In 1964 the telescope determined the rotation of Venus was just 59 days, as opposed to 89 days.


- The discovery of the periodicity of the Crab Pulsar (33 milliseconds) by Covalence and others provided the first solid evidence that neutron stars exist.

- In August 1989, the Observatory directly imaged an asteroid for the first time in history. (4769 Castalia.)

The Observatory

- The Arecibo observatory is located in the karst terrain at high elevation. It is also located close to the equator, so more of the sky can be seen.


-the waves are concentrated into the receiver then transmitted into the CCD

-the observatory was completed in 1963 by Cornell University