Radio Astronomy

A very unenergetic wavelength, or frequency, of light. Radio waves are the least energetic form of radiation known. They have wavelengths longer than 10^-3 meters and frequencies less than 10^11 Hz. Radio waves are not harmful to life because they are not strong enough to ionize atoms or destroy cells. While the Earth's atmosphere shields us from some radio radiation, it does allow radio waves in the vicinity of VHF, UHF, and FM frequencies to pass through. Astronomers study waves that pass through this "radio window" with large radio telescopes or antennas, which resemble giant satellite dishes. Often, many radio antennas are coordinated together to synthesize even bigger telescopes, such as the Very Large Array in New Mexico. In addition to astronomy, radio waves have many useful applications on Earth, such as television and radio broadcasts and RADAR.

Featured Images

View of a newly forming planetary system around the young star HL Tauri
Planet Tracks Thursday, November 6, 2014
Jetting Across the Universe Tuesday, August 12, 2014
Lightning behind space shuttle Discovery
Just Whistle Thursday, September 19, 2013
Cassini monitors Saturn's magnetic field
Radio Story Tuesday, July 16, 2013
Planetary nebula R Leporis
Stellar Twister Thursday, October 11, 2012
Combined X-ray, optical, and radio view of the galaxy Centaurus A
Busy Galaxy Sunday, April 29, 2012
Optical and radio image of the Carina Nebula, a vast stellar nursery
Birthplace of the Stars Thursday, November 17, 2011
Radio image of the Antenna galaxies
Boundless Starbirth Wednesday, October 5, 2011
Stars and gas swirl around the black hole at the center of the Milky Way
Swirling Center Tuesday, September 27, 2011
X-ray and radio image of galaxy M87
Close to the Monster Thursday, March 10, 2011
A multi-spectral view of a supernova remnant in the Small Magellanic Cloud
Life from Death Friday, September 17, 2010
M87 black hole
Busy Black Hole Wednesday, August 11, 2010
The Milky Way galaxy and the afterglow of the Big Bang make up this all-sky imag
A Little of Everything Tuesday, July 6, 2010
Turning On, Tuning In Monday, April 12, 2010
Unexpected Nursery Monday, April 27, 2009
Jetting Away Thursday, November 20, 2008
Outback Spiders Monday, November 17, 2008
Quiet Skies Friday, August 17, 2007

Radio Programs

Fast Radio Bursts Mysterious outbursts of radio waves Wednesday, February 12, 2014
NGC 660 The glow of escaping table scraps Tuesday, December 17, 2013
Carbon Monoxide Tracing the birth of stars Thursday, October 17, 2013
Bernard Lovell Pioneering a new way to see the universe Thursday, August 29, 2013
Unseen Saturn Unseen visions of a bright planet Wednesday, August 21, 2013
Desert Astronomy Astronomy in a desert wasteland Monday, August 19, 2013
Galactic Bubbles Keeping food from a black hole Wednesday, July 24, 2013
Moon and Saturn A radio story from a giant planet Tuesday, July 16, 2013
ALMA Cranking up a giant new telescope Wednesday, March 13, 2013
Pulsar Planets Reborn from a violent demise Tuesday, March 12, 2013
Milky Way Matters The Milky Way bulks up Saturday, February 9, 2013
Quasars IV An astronomical navigation system Friday, February 8, 2013
Molecule Factory Whipping up some complex molecules Tuesday, November 13, 2012
Double Heart Twin black holes in a nearby galaxy Wednesday, May 30, 2012
Wobbly Clocks Listening for cosmic “ripples” Friday, May 11, 2012
Centaurus A A galaxy with a loud voice Sunday, April 29, 2012
Moon and Venus Resetting the clocks on Venus Tuesday, April 24, 2012
Planetary Flashes Lighting up the clouds of Venus Tuesday, February 7, 2012
Grote Reber A new way to study the universe Thursday, December 22, 2011
Moon, Saturn, and Spica A planet sings out of tune Monday, November 21, 2011
Another Encounter Keeping tabs on a rocky visitor Monday, November 7, 2011
More Moon and Jupiter Reflections on an icy moon Friday, September 16, 2011
Morning Mercury A confusing planet in the morning sky Friday, September 2, 2011
Smith's Cloud A future stellar nursery Sunday, July 17, 2011
More Moon and Mercury Looking into the heart of a planet Sunday, July 3, 2011
Moon and Mercury Getting to know a hard-to-see planet Saturday, July 2, 2011
More Moon and Companions Fine-tuning the view of the heavens Monday, February 21, 2011
Counting Clouds Counting up stellar nurseries Monday, August 9, 2010
Galactic Search Searching the bright lights of downtown Wednesday, August 4, 2010
Moon and Jupiter Piecing together a picture of a giant Saturday, May 8, 2010
Galactic Bridge Building a bridge between galaxies Monday, March 15, 2010
Loud Jupiter A planet that's bright -- and loud Thursday, July 2, 2009
Tough Neighborhood Growing up in a tough neighborhood Monday, April 27, 2009
Sweet Discovery How sweet it is Wednesday, February 25, 2009
Largest Void A giant "hole" in the universe Wednesday, February 18, 2009
Mercury in the Evening Getting to know an elusive planet Saturday, January 3, 2009

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