Arecibo Observatory: Capturing Radio Waves

Communicate how technological devices use wave behavior to capture information from space (HS-PS4-5).

Telescope Controls

Adjust the receiver position and reflector shape to focus faint radio waves from deep space into a clear signal.

Receiver Height: 150 m Reflector Geometry (Curvature Radius): 300 m Incoming Signal (Frequency):

Signal Capture Efficiency 0%

The Arecibo Phenomenon

Nestled in a natural sinkhole in Puerto Rico, the Arecibo Observatory was once the world's largest single-aperture radio telescope.

It used a massive 305-meter spherical reflector dish. Because it was spherical rather than parabolic, radio waves reflecting off different parts of the dish didn't meet at a single point (spherical aberration). The complex receiver suspended above had to be precisely shaped and positioned to capture these "messy" reflections and resolve them into clear astronomical data!