X-Ray Astronomy

A very energetic wavelength, or frequency, of light. X-rays are more energetic than ultraviolet light, but less energetic than gamma-ray. They range in wavelength from 10^-8 meters to 10^-12 meters, and in frequency from 10^17 to 10^20 Hz. X-rays can be quite harmful to life because they are strong enough to ionize atoms and thus destroy cells. The Earth's atmosphere shields us from all astronomical x-ray radiation. X-rays produced by people do have useful applications, however; for example, they are used to help identify broken bones and to treat certain types of cancer.

Radio Programs

Too Close Getting too close to a dark monster Sunday, May 18, 2014
Andromeda Galaxy II Black holes in a neighboring galaxy Friday, November 8, 2013
Slowing Down A dead star slows down Friday, September 20, 2013
Black Hole Beacon A black hole announces its presence Thursday, July 25, 2013
On Station II Brilliant targets for the space station Tuesday, June 25, 2013
Moon and Spica Neighbors that stir things up Wednesday, April 24, 2013
Guitar Nebula Strumming a few astronomical notes Saturday, March 16, 2013
Nowhere to Hide Hiding in plain sight Thursday, January 31, 2013
Bright Black Hole Brightness from the ultimate darkness Wednesday, January 30, 2013
Tiny Black Hole A record-setting black hole Friday, October 26, 2012
Star Destroyer A star loses a life-and-death struggle Thursday, October 25, 2012
Cygnus X-1 A giant star vanishes from view Wednesday, August 1, 2012
Double Heart Twin black holes in a nearby galaxy Wednesday, May 30, 2012
Star in a Bottle Making a bottleful of starstuff Friday, April 13, 2012
Black Hole Bullets Bullets of hot gas from a black hole Wednesday, March 28, 2012
NuSTAR Dead stars tell some important tales Wednesday, March 14, 2012
Geminga Giving birth to a “dead” star Sunday, February 12, 2012
Milky Way’s Heart IV The flashy heart of the Milky Way Thursday, September 29, 2011
Too Close Getting too close to a black hole Tuesday, September 20, 2011
Brightest X-Ray Burst The brilliant death of a distant star Monday, June 20, 2011
Uhuru Opening a new view of the universe Saturday, December 11, 2010
Black Hole Flare-Up A black hole gets brighter Tuesday, August 3, 2010
Moon and Jupiter Lighting up alien skies Sunday, January 17, 2010
Speedy Star Speeding up a young star Sunday, October 18, 2009
Superstorm! Part 2 The Sun goes haywire Tuesday, September 1, 2009
Axions Looking for darkness from the Sun Thursday, May 21, 2009
Proxima Centauri A faint but busy stellar neighbor Thursday, April 16, 2009
Alpha Centauri B A familiar-looking neighbor Wednesday, April 15, 2009
Magnetars Energizing the solar system Thursday, March 5, 2009

Featured Images

Artist's concept of black hole binary star system in the galaxy M101
Brilliant Darkness Thursday, January 16, 2014
X-ray view of a gamma-ray burst
Zapping Earth Tuesday, March 26, 2013
Combined optical and X-ray view of two possible black holes in the galaxy IC 342
On the Job Tuesday, January 8, 2013
Artist's concept of Cygnus X-1, with X-ray image shown in inset
Powerhouse Wednesday, August 1, 2012
A flare on the surface of the star HD 189733 blasts away the atmosphere of an or
Zapped! Friday, June 29, 2012
Simulation of a supermassive black hole disrupting a star
Messy Meal Friday, May 4, 2012
Combined X-ray, optical, and radio view of the galaxy Centaurus A
Busy Galaxy Sunday, April 29, 2012
Artist's concept of stars and a gas cloud near the Milky Way's central black hol
Snack Time Thursday, March 29, 2012
Optical and X-ray image of the galaxy cluster Abell 383
Brilliant Darkness Friday, March 16, 2012
Galactic Swirl Wednesday, December 14, 2011
NGC 3758, a system of two merging galaxies
Double Trouble Saturday, June 11, 2011
X-ray view of the Carina Nebula, a stellar nursery 7,500 light-years from Earth
Star Factory Thursday, May 26, 2011
X-ray and radio image of galaxy M87
Close to the Monster Thursday, March 10, 2011
Visible and X-ray image of a supernova remnant in the Large Magellanic Cloud
Holiday Decoration Thursday, December 16, 2010
A multi-spectral view of a supernova remnant in the Small Magellanic Cloud
Life from Death Friday, September 17, 2010
This giant cluster of galaxies and hot gas provides evidence of dark matter.
Cosmic Bullets Tuesday, July 20, 2010
The remains of a supernova explosion form complex loops and filaments in this co
Colorful Aftermath Thursday, May 27, 2010
A "family" of young stars shows off in this combined infrared and X-ray view of
Big Family Friday, May 14, 2010
Hotter Galaxy Wednesday, September 23, 2009
Big Hand for a Little Star Monday, April 6, 2009
Hot Bubble Saturday, December 6, 2008
Jetting Away Thursday, November 20, 2008
Battle of the Clusters Monday, October 13, 2008
Catty Star Thursday, July 31, 2008
Big Blast Tuesday, May 20, 2008
Glowing Galaxies Tuesday, May 6, 2008
Bright Blast Monday, March 24, 2008
Galactic Glow Friday, February 8, 2008
Turn on the Lights Tuesday, January 29, 2008
Crowning Glory Tuesday, September 18, 2007
Stellar Cyclops Monday, July 16, 2007
Kepler's Odd Supernova Friday, March 9, 2007
An X-ray image of Kepler's supernova of 1604.
New Twist on an Old Star Thursday, January 11, 2007
Cosmic Bauble Wednesday, December 6, 2006
Jetting Away from a Black Hole Thursday, November 9, 2006
Psychedelic Gas Friday, June 16, 2006
Bright Reminder Monday, May 1, 2006


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