Revealing the Invisible Universe

Radio waves are simply another band -- or range of color -- of light. While stars shine most brightly at optical wavelengths, they also shine across the spectrum, including radio waves. Other objects, like star-forming clouds, emit little to any visible light, though they shine brightly in radio light.


In the News!

Our cutting-edge telescopes are used to make new, radio discoveries every day, by penetrating through the dust and clouds of galaxies that obscures visible light.



Interactively learn about our Universe, our telescopes, and the people who make it all possible.

Image of the Week:

Radar Image of Mercury

This image of Mercury was the result of a radar experiment using the NASA JPL/DSN 70-m antenna in Goldstone, CA, as the transmitter, and the Very Large Array (VLA) as the receiver. Red areas are areas of high radar reflectivity, which can either be a result of surface and near-surface composition, or surface roughness. The north pole is the brightest region, an indication of the presence of significant amounts of water ice. A similar region has been detected at the south polar regions. The two other large reflective regions have never been photographed, so the cause of the high reflections remains a mystery.
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