Radio telescopes can see the invisible and hidden activities across the Universe and are the tools for solving some of the greatest mysteries of our Cosmos. Explore what radio telescopes have taught us so far.
Connect With Us
NRAO fosters outreach programs and interactive online features that aim to help the public learn more about Radio Astronomy.
You can interact with a real astronomer at NRAO. Search for your question and if you can’t find, ask a new one. It might even be featured on our site!
New to radio astronomy? Get started by reading about the fundamentals.
Astronomers around the world use radio telescopes to observe the naturally occurring radiowaves that come from stars, planets, galaxies,…
How Do Radio Telescopes Work? Think of a radio telescope as a very specialized antenna outfitted with . In…
Stars and Exoworlds
Learn what radio astronomy reveals to us about stars and exoworlds.
Different star types “live” and “die” in different ways based on how much matter they started with and if they were born with siblings nearby.
As soon as it came online, ALMA began providing valuable information about extrasolar planetary systems at all stages of their evolution.
Neither a hole nor really black, a stellar black hole is actually the superdense remains of a very big star that imploded, violently collapsing in on itself, during a supernova.
Our Solar System
Learn what radio astronomy reveals to us about our own solar system.
What are the current mysteries that radio astronomers are working to uncover?
Dark Energy has become the largest factor in the equations that may govern the Universe.
Learn what radio astronomy reveals to us about galaxies.
A galaxy is an island of stars floating on a plate of dark matter, or so the theory goes.
Explore the Milky Way Galaxy
The Milky Way Explorer a guided trip through our spiral Galaxy and its neighborhood. You choose where to explore, and a radio astronomer talks to you about each stop.
Explore the Very Large Array
See footage from central New Mexico where the National Radio Astronomy Observatory operates the world's most versatile radio telescope, the Karl G. Jansky Very Large Array. Here, we have put together a collection of exclusive video tours we call the VLA Explorer.