Ultraviolet Astronomy

A wavelength, or frequency, of light that is more energetic than visible light, but less energetic than x-ray radiation. Ultraviolet, or UV, radiation ranges in wavelength between 10^-8 and 10^-7 meters and in frequency between 10^15 and 10^17 Hz. UV rays can be very harmful to life because they are strong enough to ionize atoms and destroy cells. Fortunately, the Earth's atmosphere shields us from most UV radiation. Astronomers who want to study UV light from celestial sources must do so from space-borne telescopes, such as the Hubble Space Telescope.

Featured Images

Composite image of the Sun
Hot Sun Wednesday, December 24, 2014
The star Gamma Cas blows away gas from a nearby nebula
Star Blaster Sunday, August 18, 2013
An ultraviolet camera gazes skyward from the Moon during the Apollo 16 mission
Looking Up Monday, April 23, 2012
Ultraviolet image of the region around the Ghost of Jupiter Nebula
Astronomical Ghost Sunday, October 31, 2010
High Lights Sunday, January 17, 2010

Radio Programs

Adhara A different view of a hot star Thursday, January 30, 2014
Moon and Company An effective type of sun block Sunday, October 27, 2013
Gamma Cassiopeia Pointing out a celestial letter Sunday, August 18, 2013
GALEX Keeping an eye on the galactic action Sunday, April 28, 2013
Adhara Another impressive “dog” star Saturday, March 2, 2013
Venus and Spica A star that’s more than meets the eye Saturday, November 17, 2012
EUVE Opening a new “window” on the universe Thursday, June 7, 2012
Moon and Taurus Snapping the universe -- from the Moon Monday, April 23, 2012
More Moon and Companions Fine-tuning the view of the heavens Monday, February 21, 2011
Moon and Spica Looking at a star in a whole new light Tuesday, December 28, 2010
Ghosts Hunting astronomical ghosts Sunday, October 31, 2010
Moon and Jupiter Piecing together a picture of a giant Saturday, May 8, 2010
Zeta Puppis Heating up a giant star Saturday, February 20, 2010
Rigel Getting away from a brilliant star Thursday, February 11, 2010


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