How to Turn An Old Satellite Dish Into a Working Radio Telescope

Radio telescopes, which you may remember Jodie Foster intently listening to for signs of alien life in Contact, pluck out radio waves from far away space. Ordinary communications satellite dishes also pick up radio waves, but of manmade origin. So hmm, how easily can you convert one into another? It's totally… »7/23/14 4:21pm7/23/14 4:21pm

22 Amazing Observatories Where Our Radio Eyes Watch the Universe

Humans can only see visible light—the portion of the electromagnetic spectrum that is visible to the human eye. That's why so hard to study celestial objects hidden behind cosmic dust. But radio astronomy reveals those parts of the Universe that can't be seen in visible light—and the secrets of dust-shrouded galaxies… »2/25/14 9:00am2/25/14 9:00am

Help Save the Arecibo Observatory: ET Is Counting on You

The Arecibo Observatory has been plagued with budget problems for years now, but it appears that the future of the world's largest radio telescope is looking bleaker than ever with cuts looming that could shut down the project for good. That grim reality has prompted the guys behind SETI@home to call out to the public… »7/07/08 4:40pm7/07/08 4:40pm